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Message-ID: <20121002071354.GA7571@hposo>
Date: Tue, 2 Oct 2012 09:14:11 +0200
From: Olivier Sobrie <olivier@...rie.be>
To: Wolfgang Grandegger <wg@...ndegger.com>
Cc: Marc Kleine-Budde <mkl@...gutronix.de>, linux-can@...r.kernel.org,
Kvaser Support <support@...ser.com>, netdev@...r.kernel.org,
linux-usb@...r.kernel.org
Subject: Re: [PATCH v4] can: kvaser_usb: Add support for Kvaser CAN/USB
devices
Hi Marc and Wolfgang,
On Sat, Sep 22, 2012 at 06:02:14PM +0200, Wolfgang Grandegger wrote:
> On 09/21/2012 11:54 AM, Marc Kleine-Budde wrote:
> > On 09/20/2012 07:06 AM, Olivier Sobrie wrote:
> >> This driver provides support for several Kvaser CAN/USB devices.
> >> Such kind of devices supports up to three CAN network interfaces.
> >>
> >> It has been tested with a Kvaser USB Leaf Light (one network interface)
> >> connected to a pch_can interface.
> >> The firmware version of the Kvaser device was 2.5.205.
> >
> > I don't remember, have the USB people already had a look on your driver
> > and gave some comments?
>
> IIRC, Oliver Neukum commented on v2. Actually we ignored v3 :(, sorry!
No problem. Thanks for the review.
>
> > From the CAN and network point of view looks good, some comments inline.
> > Would be fine, if Wolfgang can give comments or Ack about the error
> > frame generation.
>
> Olivier already sent candump traces for no cable connected and
> short-circuiting CAN high and low. The error handling looked good, IIRC,
> at least as good as the firmware can do... more comments inline...
>
> >> List of Kvaser devices supported by the driver:
> >> - Kvaser Leaf prototype (P010v2 and v3)
> >> - Kvaser Leaf Light (P010v3)
> >> - Kvaser Leaf Professional HS
> >> - Kvaser Leaf SemiPro HS
> >> - Kvaser Leaf Professional LS
> >> - Kvaser Leaf Professional SWC
> >> - Kvaser Leaf Professional LIN
> >> - Kvaser Leaf SemiPro LS
> >> - Kvaser Leaf SemiPro SWC
> >> - Kvaser Memorator II, Prototype
> >> - Kvaser Memorator II HS/HS
> >> - Kvaser USBcan Professional HS/HS
> >> - Kvaser Leaf Light GI
> >> - Kvaser Leaf Professional HS (OBD-II connector)
> >> - Kvaser Memorator Professional HS/LS
> >> - Kvaser Leaf Light "China"
> >> - Kvaser BlackBird SemiPro
> >> - Kvaser OEM Mercury
> >> - Kvaser OEM Leaf
> >> - Kvaser USBcan R
> >>
> >> Signed-off-by: Olivier Sobrie <olivier@...rie.be>
> >> ---
> >> Changes since v3:
> >> - add support for CMD_LOG_MESSAGE
> >>
> >> drivers/net/can/usb/Kconfig | 33 +
> >> drivers/net/can/usb/Makefile | 1 +
> >> drivers/net/can/usb/kvaser_usb.c | 1555 ++++++++++++++++++++++++++++++++++++++
> >> 3 files changed, 1589 insertions(+)
> >> create mode 100644 drivers/net/can/usb/kvaser_usb.c
> >>
> >> diff --git a/drivers/net/can/usb/Kconfig b/drivers/net/can/usb/Kconfig
> >> index 0a68768..578955f 100644
> >> --- a/drivers/net/can/usb/Kconfig
> >> +++ b/drivers/net/can/usb/Kconfig
> >> @@ -13,6 +13,39 @@ config CAN_ESD_USB2
> >> This driver supports the CAN-USB/2 interface
> >> from esd electronic system design gmbh (http://www.esd.eu).
> >>
> >> +config CAN_KVASER_USB
> >> + tristate "Kvaser CAN/USB interface"
> >> + ---help---
> >> + This driver adds support for Kvaser CAN/USB devices like Kvaser
> >> + Leaf Light.
> >> +
> >> + The driver gives support for the following devices:
> >> + - Kvaser Leaf prototype (P010v2 and v3)
> >> + - Kvaser Leaf Light (P010v3)
> >> + - Kvaser Leaf Professional HS
> >> + - Kvaser Leaf SemiPro HS
> >> + - Kvaser Leaf Professional LS
> >> + - Kvaser Leaf Professional SWC
> >> + - Kvaser Leaf Professional LIN
> >> + - Kvaser Leaf SemiPro LS
> >> + - Kvaser Leaf SemiPro SWC
> >> + - Kvaser Memorator II, Prototype
> >> + - Kvaser Memorator II HS/HS
> >> + - Kvaser USBcan Professional HS/HS
> >> + - Kvaser Leaf Light GI
> >> + - Kvaser Leaf Professional HS (OBD-II connector)
> >> + - Kvaser Memorator Professional HS/LS
> >> + - Kvaser Leaf Light "China"
> >> + - Kvaser BlackBird SemiPro
> >> + - Kvaser OEM Mercury
> >> + - Kvaser OEM Leaf
> >> + - Kvaser USBcan R
> >> +
> >> + If unsure, say N.
> >> +
> >> + To compile this driver as a module, choose M here: the
> >> + module will be called kvaser_usb.
> >> +
> >> config CAN_PEAK_USB
> >> tristate "PEAK PCAN-USB/USB Pro interfaces"
> >> ---help---
> >> diff --git a/drivers/net/can/usb/Makefile b/drivers/net/can/usb/Makefile
> >> index da6d1d3..80a2ee4 100644
> >> --- a/drivers/net/can/usb/Makefile
> >> +++ b/drivers/net/can/usb/Makefile
> >> @@ -4,6 +4,7 @@
> >>
> >> obj-$(CONFIG_CAN_EMS_USB) += ems_usb.o
> >> obj-$(CONFIG_CAN_ESD_USB2) += esd_usb2.o
> >> +obj-$(CONFIG_CAN_KVASER_USB) += kvaser_usb.o
> >> obj-$(CONFIG_CAN_PEAK_USB) += peak_usb/
> >>
> >> ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG
> >> diff --git a/drivers/net/can/usb/kvaser_usb.c b/drivers/net/can/usb/kvaser_usb.c
> >> new file mode 100644
> >> index 0000000..3509ca5
> >> --- /dev/null
> >> +++ b/drivers/net/can/usb/kvaser_usb.c
> >> @@ -0,0 +1,1555 @@
> >> +/*
> >> + * This program is free software; you can redistribute it and/or
> >> + * modify it under the terms of the GNU General Public License as
> >> + * published by the Free Software Foundation version 2.
> >> + *
> >> + * Parts of this driver are based on the following:
> >> + * - Kvaser linux leaf driver (version 4.78)
> >> + * - CAN driver for esd CAN-USB/2
> >> + *
> >> + * Copyright (C) 2002-2006 KVASER AB, Sweden. All rights reserved.
> >> + * Copyright (C) 2010 Matthias Fuchs <matthias.fuchs@....eu>, esd gmbh
> >> + * Copyright (C) 2012 Olivier Sobrie <olivier@...rie.be>
> >> + */
> >> +
> >> +#include <linux/init.h>
> >> +#include <linux/completion.h>
> >> +#include <linux/module.h>
> >> +#include <linux/netdevice.h>
> >> +#include <linux/usb.h>
> >> +
> >> +#include <linux/can.h>
> >> +#include <linux/can/dev.h>
> >> +#include <linux/can/error.h>
> >> +
> >> +#define MAX_TX_URBS 16
> >> +#define MAX_RX_URBS 4
> >> +#define START_TIMEOUT 1000 /* msecs */
> >> +#define STOP_TIMEOUT 1000 /* msecs */
> >> +#define USB_SEND_TIMEOUT 1000 /* msecs */
> >> +#define USB_RECV_TIMEOUT 1000 /* msecs */
> >> +#define RX_BUFFER_SIZE 3072
> >> +#define CAN_USB_CLOCK 8000000
> >> +#define MAX_NET_DEVICES 3
> >> +
> >> +/* Kvaser USB devices */
> >> +#define KVASER_VENDOR_ID 0x0bfd
> >> +#define USB_LEAF_DEVEL_PRODUCT_ID 10
> >> +#define USB_LEAF_LITE_PRODUCT_ID 11
> >> +#define USB_LEAF_PRO_PRODUCT_ID 12
> >> +#define USB_LEAF_SPRO_PRODUCT_ID 14
> >> +#define USB_LEAF_PRO_LS_PRODUCT_ID 15
> >> +#define USB_LEAF_PRO_SWC_PRODUCT_ID 16
> >> +#define USB_LEAF_PRO_LIN_PRODUCT_ID 17
> >> +#define USB_LEAF_SPRO_LS_PRODUCT_ID 18
> >> +#define USB_LEAF_SPRO_SWC_PRODUCT_ID 19
> >> +#define USB_MEMO2_DEVEL_PRODUCT_ID 22
> >> +#define USB_MEMO2_HSHS_PRODUCT_ID 23
> >> +#define USB_UPRO_HSHS_PRODUCT_ID 24
> >> +#define USB_LEAF_LITE_GI_PRODUCT_ID 25
> >> +#define USB_LEAF_PRO_OBDII_PRODUCT_ID 26
> >> +#define USB_MEMO2_HSLS_PRODUCT_ID 27
> >> +#define USB_LEAF_LITE_CH_PRODUCT_ID 28
> >> +#define USB_BLACKBIRD_SPRO_PRODUCT_ID 29
> >> +#define USB_OEM_MERCURY_PRODUCT_ID 34
> >> +#define USB_OEM_LEAF_PRODUCT_ID 35
> >> +#define USB_CAN_R_PRODUCT_ID 39
> >> +
> >> +/* USB devices features */
> >> +#define KVASER_HAS_SILENT_MODE BIT(0)
> >> +#define KVASER_HAS_TXRX_ERRORS BIT(1)
> >> +
> >> +/* Message header size */
> >> +#define MSG_HEADER_LEN 2
> >> +
> >> +/* Can message flags */
> >> +#define MSG_FLAG_ERROR_FRAME BIT(0)
> >> +#define MSG_FLAG_OVERRUN BIT(1)
> >> +#define MSG_FLAG_NERR BIT(2)
> >> +#define MSG_FLAG_WAKEUP BIT(3)
> >> +#define MSG_FLAG_REMOTE_FRAME BIT(4)
> >> +#define MSG_FLAG_RESERVED BIT(5)
> >> +#define MSG_FLAG_TX_ACK BIT(6)
> >> +#define MSG_FLAG_TX_REQUEST BIT(7)
> >> +
> >> +/* Can states */
> >> +#define M16C_STATE_BUS_RESET BIT(0)
> >> +#define M16C_STATE_BUS_ERROR BIT(4)
> >> +#define M16C_STATE_BUS_PASSIVE BIT(5)
> >> +#define M16C_STATE_BUS_OFF BIT(6)
> >> +
> >> +/* Can msg ids */
> >> +#define CMD_RX_STD_MESSAGE 12
> >> +#define CMD_TX_STD_MESSAGE 13
> >> +#define CMD_RX_EXT_MESSAGE 14
> >> +#define CMD_TX_EXT_MESSAGE 15
> >> +#define CMD_SET_BUS_PARAMS 16
> >> +#define CMD_GET_BUS_PARAMS 17
> >> +#define CMD_GET_BUS_PARAMS_REPLY 18
> >> +#define CMD_GET_CHIP_STATE 19
> >> +#define CMD_CHIP_STATE_EVENT 20
> >> +#define CMD_SET_CTRL_MODE 21
> >> +#define CMD_GET_CTRL_MODE 22
> >> +#define CMD_GET_CTRL_MODE_REPLY 23
> >> +#define CMD_RESET_CHIP 24
> >> +#define CMD_RESET_CARD 25
> >> +#define CMD_START_CHIP 26
> >> +#define CMD_START_CHIP_REPLY 27
> >> +#define CMD_STOP_CHIP 28
> >> +#define CMD_STOP_CHIP_REPLY 29
> >> +#define CMD_GET_CARD_INFO2 32
> >> +#define CMD_GET_CARD_INFO 34
> >> +#define CMD_GET_CARD_INFO_REPLY 35
> >> +#define CMD_GET_SOFTWARE_INFO 38
> >> +#define CMD_GET_SOFTWARE_INFO_REPLY 39
> >> +#define CMD_ERROR_EVENT 45
> >> +#define CMD_FLUSH_QUEUE 48
> >> +#define CMD_RESET_ERROR_COUNTER 49
> >> +#define CMD_TX_ACKNOWLEDGE 50
> >> +#define CMD_CAN_ERROR_EVENT 51
> >> +#define CMD_USB_THROTTLE 77
> >> +#define CMD_LOG_MESSAGE 106
> >> +
> >> +/* error factors */
> >> +#define M16C_EF_ACKE BIT(0)
> >> +#define M16C_EF_CRCE BIT(1)
> >> +#define M16C_EF_FORME BIT(2)
> >> +#define M16C_EF_STFE BIT(3)
> >> +#define M16C_EF_BITE0 BIT(4)
> >> +#define M16C_EF_BITE1 BIT(5)
> >> +#define M16C_EF_RCVE BIT(6)
> >> +#define M16C_EF_TRE BIT(7)
> >> +
> >> +/* bittiming parameters */
> >> +#define KVASER_USB_TSEG1_MIN 1
> >> +#define KVASER_USB_TSEG1_MAX 16
> >> +#define KVASER_USB_TSEG2_MIN 1
> >> +#define KVASER_USB_TSEG2_MAX 8
> >> +#define KVASER_USB_SJW_MAX 4
> >> +#define KVASER_USB_BRP_MIN 1
> >> +#define KVASER_USB_BRP_MAX 64
> >> +#define KVASER_USB_BRP_INC 1
> >> +
> >> +/* ctrl modes */
> >> +#define KVASER_CTRL_MODE_NORMAL 1
> >> +#define KVASER_CTRL_MODE_SILENT 2
> >> +#define KVASER_CTRL_MODE_SELFRECEPTION 3
> >> +#define KVASER_CTRL_MODE_OFF 4
> >> +
> >> +struct kvaser_msg_simple {
> >> + u8 tid;
> >> + u8 channel;
> >> +} __packed;
> >> +
> >> +struct kvaser_msg_cardinfo {
> >> + u8 tid;
> >> + u8 nchannels;
> >> + __le32 serial_number;
> >> + __le32 padding;
> >> + __le32 clock_resolution;
> >> + __le32 mfgdate;
> >> + u8 ean[8];
> >> + u8 hw_revision;
> >> + u8 usb_hs_mode;
> >> + __le16 padding2;
> >> +} __packed;
> >> +
> >> +struct kvaser_msg_cardinfo2 {
> >> + u8 tid;
> >> + u8 channel;
> >> + u8 pcb_id[24];
> >> + __le32 oem_unlock_code;
> >> +} __packed;
> >> +
> >> +struct kvaser_msg_softinfo {
> >> + u8 tid;
> >> + u8 channel;
> >> + __le32 sw_options;
> >> + __le32 fw_version;
> >> + __le16 max_outstanding_tx;
> >> + __le16 padding[9];
> >> +} __packed;
> >> +
> >> +struct kvaser_msg_busparams {
> >> + u8 tid;
> >> + u8 channel;
> >> + __le32 bitrate;
> >> + u8 tseg1;
> >> + u8 tseg2;
> >> + u8 sjw;
> >> + u8 no_samp;
> >> +} __packed;
> >> +
> >> +struct kvaser_msg_tx_can {
> >> + u8 channel;
> >> + u8 tid;
> >> + u8 msg[14];
> >> + u8 padding;
> >> + u8 flags;
> >> +} __packed;
> >> +
> >> +struct kvaser_msg_rx_can {
> >> + u8 channel;
> >> + u8 flag;
> >> + __le16 time[3];
> >> + u8 msg[14];
> >> +} __packed;
> >> +
> >> +struct kvaser_msg_chip_state_event {
> >> + u8 tid;
> >> + u8 channel;
> >> + __le16 time[3];
> >> + u8 tx_errors_count;
> >> + u8 rx_errors_count;
> >> + u8 status;
> >> + u8 padding[3];
> >> +} __packed;
> >> +
> >> +struct kvaser_msg_tx_acknowledge {
> >> + u8 channel;
> >> + u8 tid;
> >> + __le16 time[3];
> >> + u8 flags;
> >> + u8 time_offset;
> >> +} __packed;
> >> +
> >> +struct kvaser_msg_error_event {
> >> + u8 tid;
> >> + u8 flags;
> >> + __le16 time[3];
> >> + u8 channel;
> >> + u8 padding;
> >> + u8 tx_errors_count;
> >> + u8 rx_errors_count;
> >> + u8 status;
> >> + u8 error_factor;
> >> +} __packed;
> >> +
> >> +struct kvaser_msg_ctrl_mode {
> >> + u8 tid;
> >> + u8 channel;
> >> + u8 ctrl_mode;
> >> + u8 padding[3];
> >> +} __packed;
> >> +
> >> +struct kvaser_msg_flush_queue {
> >> + u8 tid;
> >> + u8 channel;
> >> + u8 flags;
> >> + u8 padding[3];
> >> +} __packed;
> >> +
> >> +struct kvaser_msg_log_message {
> >> + u8 channel;
> >> + u8 flags;
> >> + __le16 time[3];
> >> + u8 dlc;
> >> + u8 time_offset;
> >> + __le32 id;
> >> + u8 data[8];
> >> +} __packed;
> >> +
> >> +struct kvaser_msg {
> >> + u8 len;
> >> + u8 id;
> >> + union {
> >> + struct kvaser_msg_simple simple;
> >> + struct kvaser_msg_cardinfo cardinfo;
> >> + struct kvaser_msg_cardinfo2 cardinfo2;
> >> + struct kvaser_msg_softinfo softinfo;
> >> + struct kvaser_msg_busparams busparams;
> >> + struct kvaser_msg_tx_can tx_can;
> >> + struct kvaser_msg_rx_can rx_can;
> >> + struct kvaser_msg_chip_state_event chip_state_event;
> >> + struct kvaser_msg_tx_acknowledge tx_acknowledge;
> >> + struct kvaser_msg_error_event error_event;
> >> + struct kvaser_msg_ctrl_mode ctrl_mode;
> >> + struct kvaser_msg_flush_queue flush_queue;
> >> + struct kvaser_msg_log_message log_message;
> >> + } u;
> >> +} __packed;
> >> +
> >> +struct kvaser_usb_tx_urb_context {
> >> + struct kvaser_usb_net_priv *priv;
> >> + u32 echo_index;
> >> + int dlc;
> >> +};
> >> +
> >> +struct kvaser_usb {
> >> + struct usb_device *udev;
> >> + struct kvaser_usb_net_priv *nets[MAX_NET_DEVICES];
> >> +
> >> + struct usb_endpoint_descriptor *bulk_in, *bulk_out;
> >> + struct usb_anchor rx_submitted;
> >> +
> >> + u32 fw_version;
> >> + unsigned int nchannels;
> >> +
> >> + bool rxinitdone;
> >> + void *rxbuf[MAX_RX_URBS];
> >> + dma_addr_t rxbuf_dma[MAX_RX_URBS];
> >> +};
> >> +
> >> +struct kvaser_usb_net_priv {
> >> + struct can_priv can;
> >> +
> >> + atomic_t active_tx_urbs;
> >> + struct usb_anchor tx_submitted;
> >> + struct kvaser_usb_tx_urb_context tx_contexts[MAX_TX_URBS];
> >> +
> >> + struct completion start_comp, stop_comp;
> >> +
> >> + struct kvaser_usb *dev;
> >> + struct net_device *netdev;
> >> + int channel;
> >> +
> >> + struct can_berr_counter bec;
> >> +};
> >> +
> >> +static struct usb_device_id kvaser_usb_table[] = {
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_DEVEL_PRODUCT_ID) },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_PRODUCT_ID) },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS |
> >> + KVASER_HAS_SILENT_MODE },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS |
> >> + KVASER_HAS_SILENT_MODE },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LS_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS |
> >> + KVASER_HAS_SILENT_MODE },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_SWC_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS |
> >> + KVASER_HAS_SILENT_MODE },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_LIN_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS |
> >> + KVASER_HAS_SILENT_MODE },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_LS_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS |
> >> + KVASER_HAS_SILENT_MODE },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_SPRO_SWC_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS |
> >> + KVASER_HAS_SILENT_MODE },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_DEVEL_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS |
> >> + KVASER_HAS_SILENT_MODE },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSHS_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS |
> >> + KVASER_HAS_SILENT_MODE },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_UPRO_HSHS_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_GI_PRODUCT_ID) },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_PRO_OBDII_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS |
> >> + KVASER_HAS_SILENT_MODE },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_MEMO2_HSLS_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_LITE_CH_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_BLACKBIRD_SPRO_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_MERCURY_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_OEM_LEAF_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS },
> >> + { USB_DEVICE(KVASER_VENDOR_ID, USB_CAN_R_PRODUCT_ID),
> >> + .driver_info = KVASER_HAS_TXRX_ERRORS },
> >> + { }
> >> +};
> >> +MODULE_DEVICE_TABLE(usb, kvaser_usb_table);
> >> +
> >> +static inline int kvaser_usb_send_msg(const struct kvaser_usb *dev,
> >> + struct kvaser_msg *msg)
> >> +{
> >> + int actual_len;
> >> +
> >> + return usb_bulk_msg(dev->udev,
> >> + usb_sndbulkpipe(dev->udev,
> >> + dev->bulk_out->bEndpointAddress),
> >> + msg, msg->len, &actual_len,
> >> + USB_SEND_TIMEOUT);
> >> +}
> >> +
> >> +static int kvaser_usb_wait_msg(const struct kvaser_usb *dev, u8 id,
> >> + struct kvaser_msg *msg)
> >> +{
> >> + struct kvaser_msg *tmp;
> >> + void *buf;
> >> + int actual_len;
> >> + int err;
> >> + int pos = 0;
> >> +
> >> + buf = kzalloc(RX_BUFFER_SIZE, GFP_KERNEL);
> >> + if (!buf)
> >> + return -ENOMEM;
> >> +
> >> + err = usb_bulk_msg(dev->udev,
> >> + usb_rcvbulkpipe(dev->udev,
> >> + dev->bulk_in->bEndpointAddress),
> >> + buf, RX_BUFFER_SIZE, &actual_len,
> >> + USB_RECV_TIMEOUT);
> >> + if (err < 0)
> >> + goto end;
> >> +
> >> + while (pos <= actual_len - MSG_HEADER_LEN) {
> >> + tmp = buf + pos;
> >> +
> >> + if (!tmp->len)
> >> + break;
> >> +
> >> + if (pos + tmp->len > actual_len) {
> >> + dev_err(dev->udev->dev.parent, "Format error\n");
> >> + break;
> >> + }
> >> +
> >> + if (tmp->id == id) {
> >> + memcpy(msg, tmp, tmp->len);
> >> + goto end;
> >> + }
> >> +
> >> + pos += tmp->len;
> >> + }
> >> +
> >> + err = -EINVAL;
> >> +
> >> +end:
> >> + kfree(buf);
> >> +
> >> + return err;
> >> +}
> >> +
> >> +static int kvaser_usb_send_simple_msg(const struct kvaser_usb *dev,
> >> + u8 msg_id, int channel)
> >> +{
> >> + struct kvaser_msg msg = {
> >> + .len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_simple),
> >> + .id = msg_id,
> >> + .u.simple.channel = channel,
> >> + .u.simple.tid = 0xff,
> >> + };
> >> +
> >> + return kvaser_usb_send_msg(dev, &msg);
> >> +}
> >> +
> >> +static int kvaser_usb_get_software_info(struct kvaser_usb *dev)
> >> +{
> >> + struct kvaser_msg msg;
> >> + int err;
> >> +
> >> + err = kvaser_usb_send_simple_msg(dev, CMD_GET_SOFTWARE_INFO, 0);
> >> + if (err)
> >> + return err;
> >> +
> >> + err = kvaser_usb_wait_msg(dev, CMD_GET_SOFTWARE_INFO_REPLY, &msg);
> >> + if (err)
> >> + return err;
> >> +
> >> + dev->fw_version = le32_to_cpu(msg.u.softinfo.fw_version);
> >> +
> >> + return 0;
> >> +}
> >> +
> >> +static int kvaser_usb_get_card_info(struct kvaser_usb *dev)
> >> +{
> >> + struct kvaser_msg msg;
> >> + int err;
> >> +
> >> + err = kvaser_usb_send_simple_msg(dev, CMD_GET_CARD_INFO, 0);
> >> + if (err)
> >> + return err;
> >> +
> >> + err = kvaser_usb_wait_msg(dev, CMD_GET_CARD_INFO_REPLY, &msg);
> >> + if (err)
> >> + return err;
> >> +
> >> + dev->nchannels = msg.u.cardinfo.nchannels;
> >> +
> >> + return 0;
> >> +}
> >> +
> >> +static void kvaser_usb_tx_acknowledge(const struct kvaser_usb *dev,
> >> + const struct kvaser_msg *msg)
> >> +{
> >> + struct net_device_stats *stats;
> >> + struct kvaser_usb_tx_urb_context *context;
> >> + struct kvaser_usb_net_priv *priv;
> >> + struct sk_buff *skb;
> >> + struct can_frame *cf;
> >> + u8 channel = msg->u.tx_acknowledge.channel;
> >> + u8 tid = msg->u.tx_acknowledge.tid;
> >> +
> >> + if (channel >= dev->nchannels) {
> >> + dev_err(dev->udev->dev.parent,
> >> + "Invalid channel number (%d)\n", channel);
> >> + return;
> >> + }
> >> +
> >> + priv = dev->nets[channel];
> >> +
> >> + if (!netif_device_present(priv->netdev))
> >> + return;
> >> +
> >> + stats = &priv->netdev->stats;
> >> +
> >> + context = &priv->tx_contexts[tid % MAX_TX_URBS];
> >> +
> >> + /* Sometimes the state change doesn't come after a bus-off event */
> >> + if (priv->can.restart_ms &&
> >> + (priv->can.state >= CAN_STATE_BUS_OFF)) {
> >> + skb = alloc_can_err_skb(priv->netdev, &cf);
> >> + if (skb) {
> >> + cf->can_id |= CAN_ERR_RESTARTED;
> >> + netif_rx(skb);
> >> +
> >> + stats->rx_packets++;
> >> + stats->rx_bytes += cf->can_dlc;
> >> + } else {
> >> + netdev_err(priv->netdev,
> >> + "No memory left for err_skb\n");
> >> + }
> >> +
> >> + priv->can.can_stats.restarts++;
> >> + netif_carrier_on(priv->netdev);
> >> +
> >> + priv->can.state = CAN_STATE_ERROR_ACTIVE;
> >> + }
> >> +
> >> + stats->tx_packets++;
> >> + stats->tx_bytes += context->dlc;
> >> + can_get_echo_skb(priv->netdev, context->echo_index);
> >> +
> >> + context->echo_index = MAX_TX_URBS;
> >> + atomic_dec(&priv->active_tx_urbs);
> >> +
> >> + netif_wake_queue(priv->netdev);
> >> +}
> >> +
> >> +static void kvaser_usb_simple_msg_callback(struct urb *urb)
> >> +{
> >> + struct net_device *netdev = urb->context;
> >> +
> >> + kfree(urb->transfer_buffer);
> >> +
> >> + if (urb->status)
> >> + netdev_warn(netdev, "urb status received: %d\n",
> >> + urb->status);
> >> +}
> >> +
> >> +static int kvaser_usb_simple_msg_async(struct kvaser_usb_net_priv *priv,
> >> + u8 msg_id)
> >> +{
> >> + struct kvaser_usb *dev = priv->dev;
> >> + struct net_device *netdev = priv->netdev;
> >> + struct kvaser_msg *msg;
> >> + struct urb *urb;
> >> + void *buf;
> >> + int err;
> >> +
> >> + urb = usb_alloc_urb(0, GFP_ATOMIC);
> >> + if (!urb) {
> >> + netdev_err(netdev, "No memory left for URBs\n");
> >> + return -ENOMEM;
> >> + }
> >> +
> >> + buf = kmalloc(sizeof(struct kvaser_msg), GFP_ATOMIC);
> >> + if (!buf) {
> >
> > Do you have to free the usb you just allocated?
Yes it's missing.
> >
> >> + netdev_err(netdev, "No memory left for USB buffer\n");
> >> + return -ENOMEM;
> >> + }
> >> +
> >> + msg = (struct kvaser_msg *)buf;
> >> + msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_simple);
> >> + msg->id = msg_id;
> >> + msg->u.simple.channel = priv->channel;
> >> +
> >> + usb_fill_bulk_urb(urb, dev->udev,
> >> + usb_sndbulkpipe(dev->udev,
> >> + dev->bulk_out->bEndpointAddress),
> >> + buf, msg->len,
> >> + kvaser_usb_simple_msg_callback, priv);
> >> + usb_anchor_urb(urb, &priv->tx_submitted);
> >> +
> >> + err = usb_submit_urb(urb, GFP_ATOMIC);
> >> + if (err) {
> >> + netdev_err(netdev, "Error transmitting URB\n");
> >> + usb_unanchor_urb(urb);
> >> + kfree(buf);
> >> + return err;
> >
> > and here?
missing too.
> >
> >> + }
> >> +
> >> + usb_free_urb(urb);
> >> +
> >> + return 0;
> >> +}
> >> +
> >> +static void kvaser_usb_unlink_tx_urbs(struct kvaser_usb_net_priv *priv)
> >> +{
> >> + int i;
> >> +
> >> + usb_kill_anchored_urbs(&priv->tx_submitted);
> >> + atomic_set(&priv->active_tx_urbs, 0);
> >> +
> >> + for (i = 0; i < MAX_TX_URBS; i++)
> >> + priv->tx_contexts[i].echo_index = MAX_TX_URBS;
> >> +}
> >> +
> >> +static void kvaser_usb_rx_error(const struct kvaser_usb *dev,
> >> + const struct kvaser_msg *msg)
> >> +{
> >> + struct can_frame *cf;
> >> + struct sk_buff *skb;
> >> + struct net_device_stats *stats;
> >> + struct kvaser_usb_net_priv *priv;
> >> + unsigned int new_state;
> >> + u8 channel, status, txerr, rxerr, error_factor;
> >> +
> >> + switch (msg->id) {
> >> + case CMD_CAN_ERROR_EVENT:
> >> + channel = msg->u.error_event.channel;
> >> + status = msg->u.error_event.status;
> >> + txerr = msg->u.error_event.tx_errors_count;
> >> + rxerr = msg->u.error_event.rx_errors_count;
> >> + error_factor = msg->u.error_event.error_factor;
> >> + break;
> >> + case CMD_LOG_MESSAGE:
> >> + channel = msg->u.log_message.channel;
> >> + status = msg->u.log_message.data[0];
> >> + txerr = msg->u.log_message.data[2];
> >> + rxerr = msg->u.log_message.data[3];
> >> + error_factor = msg->u.log_message.data[1];
> >> + break;
> >> + case CMD_CHIP_STATE_EVENT:
> >> + channel = msg->u.chip_state_event.channel;
> >> + status = msg->u.chip_state_event.status;
> >> + txerr = msg->u.chip_state_event.tx_errors_count;
> >> + rxerr = msg->u.chip_state_event.rx_errors_count;
> >> + error_factor = 0;
> >> + break;
> >> + default:
> >> + dev_err(dev->udev->dev.parent, "Invalid msg id (%d)\n",
> >> + msg->id);
> >> + return;
> >> + }
> >> +
> >> + if (channel >= dev->nchannels) {
> >> + dev_err(dev->udev->dev.parent,
> >> + "Invalid channel number (%d)\n", channel);
> >> + return;
> >> + }
> >> +
> >> + priv = dev->nets[channel];
> >> + stats = &priv->netdev->stats;
> >> +
> >> + if (status & M16C_STATE_BUS_RESET) {
> >> + kvaser_usb_unlink_tx_urbs(priv);
> >> + return;
> >> + }
> >> +
> >> + skb = alloc_can_err_skb(priv->netdev, &cf);
> >> + if (!skb) {
> >> + stats->rx_dropped++;
> >> + return;
> >> + }
> >> +
> >> + cf->can_id |= CAN_ERR_BUSERROR;
>
> At state change is *not* a bus error. The line above should e moved into
> the "if (error_factor)" block below.
ok
>
> >> +
> >> + new_state = priv->can.state;
> >> +
> >> + netdev_dbg(priv->netdev, "Error status: 0x%02x\n", status);
> >> +
> >> + if (status & M16C_STATE_BUS_OFF) {
> >> + cf->can_id |= CAN_ERR_BUSOFF;
> >> +
> >> + priv->can.can_stats.bus_off++;
> >> + if (!priv->can.restart_ms)
> >> + kvaser_usb_simple_msg_async(priv, CMD_STOP_CHIP);
> >> +
> >> + netif_carrier_off(priv->netdev);
> >> +
> >> + new_state = CAN_STATE_BUS_OFF;
> >> + }
> >> +
> >> + if (status & M16C_STATE_BUS_PASSIVE) {
> >
> > else if ()
> >
> > as bus passive and bus off is mutually exclusive.
ok
> >
> >> + if (priv->can.state != CAN_STATE_ERROR_PASSIVE) {
> >> + cf->can_id |= CAN_ERR_CRTL;
> >> +
> >> + if ((txerr > 0) || (rxerr > 0))
>
> if (txerr | rxerr) ?
ok
>
> >> + cf->data[1] = (txerr > rxerr)
> >> + ? CAN_ERR_CRTL_TX_PASSIVE
> >> + : CAN_ERR_CRTL_RX_PASSIVE;
> >> + else
> >> + cf->data[1] = CAN_ERR_CRTL_TX_PASSIVE |
> >> + CAN_ERR_CRTL_RX_PASSIVE;
> >> +
> >> + priv->can.can_stats.error_passive++;
> >> + }
> >> +
> >> + new_state = CAN_STATE_ERROR_PASSIVE;
> >> + }
> >> +
> >> + if (status == M16C_STATE_BUS_ERROR) {
> >> + if ((priv->can.state < CAN_STATE_ERROR_WARNING) &&
> >> + ((txerr > 96) || (rxerr > 96))) {
> >
> > Is is >= 96 ?
>
> Yep.
ok
>
> >> + cf->can_id |= CAN_ERR_CRTL;
> >> + cf->data[1] = (txerr > rxerr)
> >> + ? CAN_ERR_CRTL_TX_WARNING
> >> + : CAN_ERR_CRTL_RX_WARNING;
> >> +
> >> + priv->can.can_stats.error_warning++;
> >> + new_state = CAN_STATE_ERROR_WARNING;
> >> + } else if (priv->can.state > CAN_STATE_ERROR_ACTIVE) {
> >> + cf->can_id |= CAN_ERR_PROT;
> >> + cf->data[2] = CAN_ERR_PROT_ACTIVE;
> >> +
> >> + new_state = CAN_STATE_ERROR_ACTIVE;
> >> + }
> >> + }
> >> +
> >> + if (!status) {
> >> + cf->can_id |= CAN_ERR_PROT;
> >> + cf->data[2] = CAN_ERR_PROT_ACTIVE;
> >> +
> >> + new_state = CAN_STATE_ERROR_ACTIVE;
> >> + }
> >> +
> >> + if (priv->can.restart_ms &&
> >> + (priv->can.state >= CAN_STATE_BUS_OFF) &&
> >> + (new_state < CAN_STATE_BUS_OFF)) {
> >> + cf->can_id |= CAN_ERR_RESTARTED;
> >> + netif_carrier_on(priv->netdev);
> >> +
> >> + priv->can.can_stats.restarts++;
> >> + }
> >> +
> >> + if (error_factor) {
> >> + priv->can.can_stats.bus_error++;
> >> + stats->rx_errors++;
> >> +
> >> + cf->can_id |= CAN_ERR_PROT;
> >> +
> >> + if (error_factor & M16C_EF_ACKE)
> >> + cf->data[3] |= (CAN_ERR_PROT_LOC_ACK);
> >> + if (error_factor & M16C_EF_CRCE)
> >> + cf->data[3] |= (CAN_ERR_PROT_LOC_CRC_SEQ |
> >> + CAN_ERR_PROT_LOC_CRC_DEL);
> >> + if (error_factor & M16C_EF_FORME)
> >> + cf->data[2] |= CAN_ERR_PROT_FORM;
> >> + if (error_factor & M16C_EF_STFE)
> >> + cf->data[2] |= CAN_ERR_PROT_STUFF;
> >> + if (error_factor & M16C_EF_BITE0)
> >> + cf->data[2] |= CAN_ERR_PROT_BIT0;
> >> + if (error_factor & M16C_EF_BITE1)
> >> + cf->data[2] |= CAN_ERR_PROT_BIT1;
> >> + if (error_factor & M16C_EF_TRE)
> >> + cf->data[2] |= CAN_ERR_PROT_TX;
> >> + }
> >> +
> >> + cf->data[6] = txerr;
> >> + cf->data[7] = rxerr;
> >> +
> >> + priv->bec.txerr = txerr;
> >> + priv->bec.rxerr = rxerr;
> >> +
> >> + priv->can.state = new_state;
> >> +
> >> + netif_rx(skb);
> >> +
> >> + stats->rx_packets++;
> >> + stats->rx_bytes += cf->can_dlc;
> >> +}
> >> +
> >> +static void kvaser_usb_rx_can_msg(const struct kvaser_usb *dev,
> >> + const struct kvaser_msg *msg)
> >> +{
> >> + struct kvaser_usb_net_priv *priv;
> >> + struct can_frame *cf;
> >> + struct sk_buff *skb;
> >> + struct net_device_stats *stats;
> >> + u8 channel = msg->u.rx_can.channel;
> >> +
> >> + if (channel >= dev->nchannels) {
> >> + dev_err(dev->udev->dev.parent,
> >> + "Invalid channel number (%d)\n", channel);
> >> + return;
> >> + }
> >> +
> >> + priv = dev->nets[channel];
> >> + stats = &priv->netdev->stats;
> >> +
> >> + skb = alloc_can_skb(priv->netdev, &cf);
> >> + if (!skb) {
> >> + stats->tx_dropped++;
> >> + return;
> >> + }
> >> +
> >> + cf->can_id = ((msg->u.rx_can.msg[0] & 0x1f) << 6) |
> >> + (msg->u.rx_can.msg[1] & 0x3f);
> >> + cf->can_dlc = get_can_dlc(msg->u.rx_can.msg[5]);
> >> +
> >> + if (msg->id == CMD_RX_EXT_MESSAGE) {
> >> + cf->can_id <<= 18;
> >> + cf->can_id |= ((msg->u.rx_can.msg[2] & 0x0f) << 14) |
> >> + ((msg->u.rx_can.msg[3] & 0xff) << 6) |
> >> + (msg->u.rx_can.msg[4] & 0x3f);
> >> + cf->can_id |= CAN_EFF_FLAG;
> >> + }
> >> +
> >> + if (msg->u.rx_can.flag & MSG_FLAG_REMOTE_FRAME) {
> >> + cf->can_id |= CAN_RTR_FLAG;
> >> + } else if (msg->u.rx_can.flag & (MSG_FLAG_ERROR_FRAME |
> >> + MSG_FLAG_NERR)) {
> >> + cf->can_id |= CAN_ERR_FLAG;
> >> + cf->can_dlc = CAN_ERR_DLC;
>
> > Please move the error skb creation handling into a subfunction, use
> > can_alloc_err_skb() in that function. Please move the:
> >
> > if (msg->u.rx_can.flag & ...)
> >
> > up in this function, before the alloc_can_skb().
> >
> >> +
> >> + netdev_err(priv->netdev, "Unknow error (flags: 0x%02x)\n",
> >> + msg->u.rx_can.flag);
> >> +
> >> + stats->rx_errors++;
>
> This an *error* which does normally not happen, IIRC. Therefore I do not
> see a need to pass it to the user as error message.
ok I do not pass an error frame for such kind of message.
>
> >> + } else if (msg->u.rx_can.flag & MSG_FLAG_OVERRUN) {
> >> + cf->can_id = CAN_ERR_FLAG | CAN_ERR_CRTL;
> >> + cf->can_dlc = CAN_ERR_DLC;
> >> + cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
> >> +
> >> + stats->rx_over_errors++;
> >> + stats->rx_errors++;
> >
> > This should go into the error skb generation function, too.
> >
> >> + } else if (!msg->u.rx_can.flag) {
> >> + memcpy(cf->data, &msg->u.rx_can.msg[6], cf->can_dlc);
> >
> > Please don't copy the contents of RTR frames.
It's not copied. When it's a RTR frame, "msg->u.rx_can.flag" is set to
MSG_FLAG_REMOTE_FRAME.
> >
> >> + } else {
> >> + kfree_skb(skb);
> >
> > After you have moved the error skb generation into a seperate function,
> > you should get rid of the kfree(skb), too. The function should look like
> > this (pseude code):
> >
> > static void kvaser_usb_rx_can_msg(const struct kvaser_usb *dev,
> > const struct kvaser_msg *msg)
> > {
> > if (channel_invalid())
> > return;
> >
> > if (msg->u.rx_can.flag & ERROR) {
> > kvaser_usb_rx_can_err_msg();
> > return;
> > } else if (msg->u.rx_can.flag & INVALID_FRAME) {
> > return;
> > }
> >
> > skb = alloc_can_skb();
> >
> > /* existing dlc, rtr and data handling code */
> > ...
> > }
ok
> >
> >
> >> + return;
> >> + }
> >> +
> >> + netif_rx(skb);
> >> +
> >> + stats->rx_packets++;
> >> + stats->rx_bytes += cf->can_dlc;
> >> +}
> >> +
> >> +static void kvaser_usb_start_chip_reply(const struct kvaser_usb *dev,
> >> + const struct kvaser_msg *msg)
> >> +{
> >> + struct kvaser_usb_net_priv *priv;
> >> + u8 channel = msg->u.simple.channel;
> >> +
> >> + if (channel >= dev->nchannels) {
> >> + dev_err(dev->udev->dev.parent,
> >> + "Invalid channel number (%d)\n", channel);
> >> + return;
> >> + }
> >> +
> >> + priv = dev->nets[channel];
> >> +
> >> + if (completion_done(&priv->start_comp) &&
> >> + netif_queue_stopped(priv->netdev)) {
> >> + netif_wake_queue(priv->netdev);
> >> + } else {
> >> + netif_start_queue(priv->netdev);
> >> + complete(&priv->start_comp);
> >> + }
> >> +}
> >> +
> >> +static void kvaser_usb_stop_chip_reply(const struct kvaser_usb *dev,
> >> + const struct kvaser_msg *msg)
> >> +{
> >> + struct kvaser_usb_net_priv *priv;
> >> + u8 channel = msg->u.simple.channel;
> >> +
> >> + if (channel >= dev->nchannels) {
> >> + dev_err(dev->udev->dev.parent,
> >> + "Invalid channel number (%d)\n", channel);
> >> + return;
> >> + }
> >> +
> >> + priv = dev->nets[channel];
> >> +
> >> + complete(&priv->stop_comp);
> >> +}
> >> +
> >> +static void kvaser_usb_handle_message(const struct kvaser_usb *dev,
> >> + const struct kvaser_msg *msg)
> >> +{
> >> + switch (msg->id) {
> >> + case CMD_START_CHIP_REPLY:
> >> + kvaser_usb_start_chip_reply(dev, msg);
> >> + break;
> >> +
> >> + case CMD_STOP_CHIP_REPLY:
> >> + kvaser_usb_stop_chip_reply(dev, msg);
> >> + break;
> >> +
> >> + case CMD_RX_STD_MESSAGE:
> >> + case CMD_RX_EXT_MESSAGE:
> >> + kvaser_usb_rx_can_msg(dev, msg);
> >> + break;
> >> +
> >> + case CMD_CHIP_STATE_EVENT:
> >> + case CMD_CAN_ERROR_EVENT:
> >> + kvaser_usb_rx_error(dev, msg);
> >> + break;
> >> +
> >> + case CMD_LOG_MESSAGE:
> >> + if (msg->u.log_message.flags & MSG_FLAG_ERROR_FRAME)
> >> + kvaser_usb_rx_error(dev, msg);
> >> + break;
> >> +
> >> + case CMD_TX_ACKNOWLEDGE:
> >> + kvaser_usb_tx_acknowledge(dev, msg);
> >> + break;
> >> +
> >> + default:
> >> + dev_warn(dev->udev->dev.parent,
> >> + "Unhandled message (%d)\n", msg->id);
> >> + break;
> >> + }
> >> +}
> >> +
> >> +static void kvaser_usb_read_bulk_callback(struct urb *urb)
> >> +{
> >> + struct kvaser_usb *dev = urb->context;
> >> + struct kvaser_msg *msg;
> >> + int pos = 0;
> >> + int err, i;
> >> +
> >> + switch (urb->status) {
> >> + case 0:
> >> + break;
> >> + case -ENOENT:
> >> + case -ESHUTDOWN:
> >> + return;
> >> + default:
> >> + dev_info(dev->udev->dev.parent, "Rx URB aborted (%d)\n",
> >> + urb->status);
> >> + goto resubmit_urb;
> >> + }
> >> +
> >> + while (pos <= urb->actual_length - MSG_HEADER_LEN) {
> >> + msg = urb->transfer_buffer + pos;
> >> +
> >> + if (!msg->len)
> >> + break;
> >> +
> >> + if (pos + msg->len > urb->actual_length) {
> >> + dev_err(dev->udev->dev.parent, "Format error\n");
> >> + break;
> >> + }
> >> +
> >> + kvaser_usb_handle_message(dev, msg);
> >> +
> >> + pos += msg->len;
> >> + }
> >> +
> >> +resubmit_urb:
> >> + usb_fill_bulk_urb(urb, dev->udev,
> >> + usb_rcvbulkpipe(dev->udev,
> >> + dev->bulk_in->bEndpointAddress),
> >> + urb->transfer_buffer, RX_BUFFER_SIZE,
> >> + kvaser_usb_read_bulk_callback, dev);
> >> +
> >> + err = usb_submit_urb(urb, GFP_ATOMIC);
> >> + if (err == -ENODEV) {
> >> + for (i = 0; i < dev->nchannels; i++) {
> >> + if (!dev->nets[i])
> >> + continue;
> >> +
> >> + netif_device_detach(dev->nets[i]->netdev);
> >> + }
> >> + } else if (err) {
> >> + dev_err(dev->udev->dev.parent,
> >> + "Failed resubmitting read bulk urb: %d\n", err);
> >> + }
> >> +
> >> + return;
> >> +}
> >> +
> >> +static int kvaser_usb_setup_rx_urbs(struct kvaser_usb *dev)
> >> +{
> >> + int i, err = 0;
> >> +
> >> + if (dev->rxinitdone)
> >> + return 0;
> >> +
> >> + for (i = 0; i < MAX_RX_URBS; i++) {
> >> + struct urb *urb = NULL;
> >> + u8 *buf = NULL;
> >> + dma_addr_t buf_dma;
> >> +
> >> + urb = usb_alloc_urb(0, GFP_KERNEL);
> >> + if (!urb) {
> >> + dev_warn(dev->udev->dev.parent,
> >> + "No memory left for URBs\n");
> >> + err = -ENOMEM;
> >> + break;
> >> + }
> >> +
> >> + buf = usb_alloc_coherent(dev->udev, RX_BUFFER_SIZE,
> >> + GFP_KERNEL, &buf_dma);
> >> + if (!buf) {
> >> + dev_warn(dev->udev->dev.parent,
> >> + "No memory left for USB buffer\n");
> >> + usb_free_urb(urb);
> >> + err = -ENOMEM;
> >> + break;
> >> + }
> >> +
> >> + usb_fill_bulk_urb(urb, dev->udev,
> >> + usb_rcvbulkpipe(dev->udev,
> >> + dev->bulk_in->bEndpointAddress),
> >> + buf, RX_BUFFER_SIZE,
> >> + kvaser_usb_read_bulk_callback,
> >> + dev);
> >> + urb->transfer_dma = buf_dma;
> >> + urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
> >> + usb_anchor_urb(urb, &dev->rx_submitted);
> >> +
> >> + err = usb_submit_urb(urb, GFP_KERNEL);
> >> + if (err) {
> >> + usb_unanchor_urb(urb);
> >> + usb_free_coherent(dev->udev, RX_BUFFER_SIZE, buf,
> >> + buf_dma);
> >
> > Do you have to call usb_free_usb() here, or does the usb frame work take
> > care of this?
It's missing. Sorry.
> >
> >> + break;
> >> + }
> >> +
> >> + dev->rxbuf[i] = buf;
> >> + dev->rxbuf_dma[i] = buf_dma;
> >> +
> >> + usb_free_urb(urb);
> >> + }
> >> +
> >> + if (i == 0) {
> >> + dev_warn(dev->udev->dev.parent,
> >> + "Cannot setup read URBs, error %d\n", err);
> >> + return err;
> >> + } else if (i < MAX_RX_URBS) {
> >> + dev_warn(dev->udev->dev.parent,
> >> + "RX performances may be slow\n");
> >> + }
> >> +
> >> + dev->rxinitdone = true;
> >> +
> >> + return 0;
> >> +}
> >> +
> >> +static int kvaser_usb_set_opt_mode(const struct kvaser_usb_net_priv *priv)
> >> +{
> >> + struct kvaser_msg msg = {
> >> + .id = CMD_SET_CTRL_MODE,
> >> + .len = MSG_HEADER_LEN +
> >> + sizeof(struct kvaser_msg_ctrl_mode),
> >> + .u.ctrl_mode.tid = 0xff,
> >> + .u.ctrl_mode.channel = priv->channel,
> >> + };
> >> +
> >> + if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
> >> + msg.u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_SILENT;
> >> + else
> >> + msg.u.ctrl_mode.ctrl_mode = KVASER_CTRL_MODE_NORMAL;
> >> +
> >> + return kvaser_usb_send_msg(priv->dev, &msg);
> >> +}
> >> +
> >> +static int kvaser_usb_start_chip(struct kvaser_usb_net_priv *priv)
> >> +{
> >> + int err;
> >> +
> >> + init_completion(&priv->start_comp);
> >> +
> >> + err = kvaser_usb_send_simple_msg(priv->dev, CMD_START_CHIP,
> >> + priv->channel);
> >> + if (err)
> >> + return err;
> >> +
> >> + if (!wait_for_completion_timeout(&priv->start_comp,
> >> + msecs_to_jiffies(START_TIMEOUT)))
> >> + return -ETIMEDOUT;
> >> +
> >> + return 0;
> >> +}
> >> +
> >> +static int kvaser_usb_open(struct net_device *netdev)
> >> +{
> >> + struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
> >> + struct kvaser_usb *dev = priv->dev;
> >> + int err;
> >> +
> >> + err = open_candev(netdev);
> >> + if (err)
> >> + return err;
> >> +
> >> + err = kvaser_usb_setup_rx_urbs(dev);
> >> + if (err)
> >> + goto error;
> >> +
> >> + err = kvaser_usb_set_opt_mode(priv);
> >> + if (err)
> >> + goto error;
> >> +
> >> + err = kvaser_usb_start_chip(priv);
> >> + if (err) {
> >> + netdev_warn(netdev, "Cannot start device, error %d\n", err);
> >> + goto error;
> >> + }
> >> +
> >> + priv->can.state = CAN_STATE_ERROR_ACTIVE;
> >> +
> >> + return 0;
> >> +
> >> +error:
> >> + close_candev(netdev);
> >> + return err;
> >> +}
> >> +
> >> +static void kvaser_usb_unlink_all_urbs(struct kvaser_usb *dev)
> >> +{
> >> + int i;
> >> +
> >> + usb_kill_anchored_urbs(&dev->rx_submitted);
> >> +
> >> + for (i = 0; i < MAX_RX_URBS; i++)
> >> + usb_free_coherent(dev->udev, RX_BUFFER_SIZE,
> >> + dev->rxbuf[i],
> >> + dev->rxbuf_dma[i]);
> >> +
> >> + for (i = 0; i < MAX_NET_DEVICES; i++) {
> >> + struct kvaser_usb_net_priv *priv = dev->nets[i];
> >> +
> >> + if (priv)
> >> + kvaser_usb_unlink_tx_urbs(priv);
> >> + }
> >> +}
> >> +
> >> +static int kvaser_usb_stop_chip(struct kvaser_usb_net_priv *priv)
> >> +{
> >> + int err;
> >> +
> >> + init_completion(&priv->stop_comp);
> >> +
> >> + err = kvaser_usb_send_simple_msg(priv->dev, CMD_STOP_CHIP,
> >> + priv->channel);
> >> + if (err)
> >> + return err;
> >> +
> >> + if (!wait_for_completion_timeout(&priv->stop_comp,
> >> + msecs_to_jiffies(STOP_TIMEOUT)))
> >> + return -ETIMEDOUT;
> >> +
> >> + return 0;
> >> +}
> >> +
> >> +static int kvaser_usb_flush_queue(struct kvaser_usb_net_priv *priv)
> >> +{
> >> + struct kvaser_msg msg = {
> >> + .id = CMD_FLUSH_QUEUE,
> >> + .len = MSG_HEADER_LEN +
> >> + sizeof(struct kvaser_msg_flush_queue),
> >> + .u.flush_queue.channel = priv->channel,
> >> + .u.flush_queue.flags = 0x00,
> >> + };
> >> +
> >> + return kvaser_usb_send_msg(priv->dev, &msg);
> >> +}
> >> +
> >> +static int kvaser_usb_close(struct net_device *netdev)
> >> +{
> >> + struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
> >> + struct kvaser_usb *dev = priv->dev;
> >> + int err;
> >> +
> >> + netif_stop_queue(netdev);
> >> +
> >> + err = kvaser_usb_flush_queue(priv);
> >> + if (err)
> >> + netdev_warn(netdev, "Cannot flush queue, error %d\n", err);
> >> +
> >> + if (kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, priv->channel))
> >> + netdev_warn(netdev, "Cannot reset card, error %d\n", err);
> >> +
> >> + err = kvaser_usb_stop_chip(priv);
> >> + if (err)
> >> + netdev_warn(netdev, "Cannot stop device, error %d\n", err);
> >> +
> >> + priv->can.state = CAN_STATE_STOPPED;
> >> + close_candev(priv->netdev);
> >> +
> >> + return 0;
> >> +}
> >> +
> >> +static void kvaser_usb_write_bulk_callback(struct urb *urb)
> >> +{
> >> + struct kvaser_usb_tx_urb_context *context = urb->context;
> >> + struct kvaser_usb_net_priv *priv;
> >> + struct net_device *netdev;
> >> +
> >> + if (WARN_ON(!context))
> >> + return;
> >> +
> >> + priv = context->priv;
> >> + netdev = priv->netdev;
> >> +
> >> + kfree(urb->transfer_buffer);
> >> +
> >> + if (!netif_device_present(netdev))
> >> + return;
> >> +
> >> + if (urb->status)
> >> + netdev_info(netdev, "Tx URB aborted (%d)\n", urb->status);
> >> +}
> >> +
> >> +static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb,
> >> + struct net_device *netdev)
> >> +{
> >> + struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
> >> + struct kvaser_usb *dev = priv->dev;
> >> + struct net_device_stats *stats = &netdev->stats;
> >> + struct can_frame *cf = (struct can_frame *)skb->data;
> >> + struct kvaser_usb_tx_urb_context *context = NULL;
> >> + struct urb *urb;
> >> + void *buf;
> >> + struct kvaser_msg *msg;
> >> + int i, err;
> >> + int ret = NETDEV_TX_OK;
> >> +
> >> + if (can_dropped_invalid_skb(netdev, skb))
> >> + return NETDEV_TX_OK;
> >> +
> >> + urb = usb_alloc_urb(0, GFP_ATOMIC);
> >> + if (!urb) {
> >> + netdev_err(netdev, "No memory left for URBs\n");
> >> + stats->tx_dropped++;
> >> + dev_kfree_skb(skb);
> >> + return NETDEV_TX_OK;
> >> + }
> >> +
> >> + buf = kmalloc(sizeof(struct kvaser_msg), GFP_ATOMIC);
> >> + if (!buf) {
> >> + netdev_err(netdev, "No memory left for USB buffer\n");
> >> + stats->tx_dropped++;
> >> + dev_kfree_skb(skb);
> > What about the urb?
Same as above.
> >> + goto nobufmem;
> >> + }
> >> +
> >> + msg = (struct kvaser_msg *)buf;
> >
> > nitpick: cast is not needed, as buf is void *
Indeed.
> >
> >> + msg->len = MSG_HEADER_LEN + sizeof(struct kvaser_msg_tx_can);
> >> + msg->u.tx_can.flags = 0;
> >> + msg->u.tx_can.channel = priv->channel;
> >> +
> >> + if (cf->can_id & CAN_EFF_FLAG) {
> >> + msg->id = CMD_TX_EXT_MESSAGE;
> >> + msg->u.tx_can.msg[0] = (cf->can_id >> 24) & 0x1f;
> >> + msg->u.tx_can.msg[1] = (cf->can_id >> 18) & 0x3f;
> >> + msg->u.tx_can.msg[2] = (cf->can_id >> 14) & 0x0f;
> >> + msg->u.tx_can.msg[3] = (cf->can_id >> 6) & 0xff;
> >> + msg->u.tx_can.msg[4] = cf->can_id & 0x3f;
> >> + } else {
> >> + msg->id = CMD_TX_STD_MESSAGE;
> >> + msg->u.tx_can.msg[0] = (cf->can_id >> 6) & 0x1f;
> >> + msg->u.tx_can.msg[1] = cf->can_id & 0x3f;
> >> + }
> >> +
> >> + msg->u.tx_can.msg[5] = cf->can_dlc;
> >> + memcpy(&msg->u.tx_can.msg[6], cf->data, cf->can_dlc);
> >> +
> >> + if (cf->can_id & CAN_RTR_FLAG)
> >> + msg->u.tx_can.flags |= MSG_FLAG_REMOTE_FRAME;
> >> +
> >> + for (i = 0; i < ARRAY_SIZE(priv->tx_contexts); i++) {
> >> + if (priv->tx_contexts[i].echo_index == MAX_TX_URBS) {
> >> + context = &priv->tx_contexts[i];
> >> + break;
> >> + }
> >> + }
> >> +
> >> + if (!context) {
> >> + netdev_warn(netdev, "cannot find free context\n");
> >> + ret = NETDEV_TX_BUSY;
> >> + goto releasebuf;
> >> + }
> >> +
> >> + context->priv = priv;
> >> + context->echo_index = i;
> >> + context->dlc = cf->can_dlc;
> >> +
> >> + msg->u.tx_can.tid = context->echo_index;
> >> +
> >> + usb_fill_bulk_urb(urb, dev->udev,
> >> + usb_sndbulkpipe(dev->udev,
> >> + dev->bulk_out->bEndpointAddress),
> >> + buf, msg->len,
> >> + kvaser_usb_write_bulk_callback, context);
> >> + usb_anchor_urb(urb, &priv->tx_submitted);
> >> +
> >> + can_put_echo_skb(skb, netdev, context->echo_index);
> >> +
> >> + atomic_inc(&priv->active_tx_urbs);
> >> +
> >> + if (atomic_read(&priv->active_tx_urbs) >= MAX_TX_URBS)
> >> + netif_stop_queue(netdev);
> >> +
> >> + err = usb_submit_urb(urb, GFP_ATOMIC);
> >> + if (unlikely(err)) {
> >> + can_free_echo_skb(netdev, context->echo_index);
> >> +
> >> + atomic_dec(&priv->active_tx_urbs);
> >> + usb_unanchor_urb(urb);
> >> +
> >> + stats->tx_dropped++;
> >> +
> >> + if (err == -ENODEV)
> >> + netif_device_detach(netdev);
> >> + else
> >> + netdev_warn(netdev, "Failed tx_urb %d\n", err);
> >> +
> >> + goto releasebuf;
> >> + }
> >> +
> >> + netdev->trans_start = jiffies;
> >
> > Is this still needed?
No.
> >
> >> +
> >> + usb_free_urb(urb);
> >> +
> >> + return NETDEV_TX_OK;
> >> +
> >> +releasebuf:
> >> + kfree(buf);
> >> +nobufmem:
> >> + usb_free_urb(urb);
> >> + return ret;
> >> +}
> >> +
> >> +static const struct net_device_ops kvaser_usb_netdev_ops = {
> >> + .ndo_open = kvaser_usb_open,
> >> + .ndo_stop = kvaser_usb_close,
> >> + .ndo_start_xmit = kvaser_usb_start_xmit,
> >> +};
> >> +
> >> +static struct can_bittiming_const kvaser_usb_bittiming_const = {
> >> + .name = "kvaser_usb",
> >> + .tseg1_min = KVASER_USB_TSEG1_MIN,
> >> + .tseg1_max = KVASER_USB_TSEG1_MAX,
> >> + .tseg2_min = KVASER_USB_TSEG2_MIN,
> >> + .tseg2_max = KVASER_USB_TSEG2_MAX,
> >> + .sjw_max = KVASER_USB_SJW_MAX,
> >> + .brp_min = KVASER_USB_BRP_MIN,
> >> + .brp_max = KVASER_USB_BRP_MAX,
> >> + .brp_inc = KVASER_USB_BRP_INC,
> >> +};
> >> +
> >> +static int kvaser_usb_set_bittiming(struct net_device *netdev)
> >> +{
> >> + struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
> >> + struct can_bittiming *bt = &priv->can.bittiming;
> >> + struct kvaser_usb *dev = priv->dev;
> >> + struct kvaser_msg msg = {
> >> + .id = CMD_SET_BUS_PARAMS,
> >> + .len = MSG_HEADER_LEN +
> >> + sizeof(struct kvaser_msg_busparams),
> >> + .u.busparams.channel = priv->channel,
> >> + .u.busparams.tid = 0xff,
> >> + .u.busparams.bitrate = cpu_to_le32(bt->bitrate),
> >> + .u.busparams.sjw = bt->sjw,
> >> + .u.busparams.tseg1 = bt->prop_seg + bt->phase_seg1,
> >> + .u.busparams.tseg2 = bt->phase_seg2,
> >> + };
> >> +
> >> + if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
> >> + msg.u.busparams.no_samp = 3;
> >> + else
> >> + msg.u.busparams.no_samp = 1;
> >> +
> >> + return kvaser_usb_send_msg(dev, &msg);
> >> +}
> >> +
> >> +static int kvaser_usb_set_mode(struct net_device *netdev,
> >> + enum can_mode mode)
> >> +{
> >> + struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
> >> + int err;
> >> +
> >> + switch (mode) {
> >> + case CAN_MODE_START:
> >> + err = kvaser_usb_simple_msg_async(priv, CMD_START_CHIP);
> >> + if (err)
> >> + return err;
> >> + break;
> >> + default:
> >> + return -EOPNOTSUPP;
> >> + }
> >> +
> >> + return 0;
> >> +}
> >> +
> >> +static int kvaser_usb_get_berr_counter(const struct net_device *netdev,
> >> + struct can_berr_counter *bec)
> >> +{
> >> + struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
> >> +
> >> + *bec = priv->bec;
> >> +
> >> + return 0;
> >> +}
> >> +
> >> +static int kvaser_usb_init_one(struct usb_interface *intf,
> >> + const struct usb_device_id *id, int channel)
> >> +{
> >> + struct kvaser_usb *dev = usb_get_intfdata(intf);
> >> + struct net_device *netdev;
> >> + struct kvaser_usb_net_priv *priv;
> >> + int i, err;
> >> +
> >> + netdev = alloc_candev(sizeof(*priv), MAX_TX_URBS);
> >> + if (!netdev) {
> >> + dev_err(&intf->dev, "Cannot alloc candev\n");
> >> + return -ENOMEM;
> >> + }
> >> +
> >> + priv = netdev_priv(netdev);
> >> +
> >> + init_completion(&priv->start_comp);
> >> + init_completion(&priv->stop_comp);
> >> +
> >> + init_usb_anchor(&priv->tx_submitted);
> >> + atomic_set(&priv->active_tx_urbs, 0);
> >> +
> >> + for (i = 0; i < ARRAY_SIZE(priv->tx_contexts); i++)
> >> + priv->tx_contexts[i].echo_index = MAX_TX_URBS;
> >> +
> >> + priv->dev = dev;
> >> + priv->netdev = netdev;
> >> + priv->channel = channel;
> >> +
> >> + priv->can.state = CAN_STATE_STOPPED;
> >> + priv->can.clock.freq = CAN_USB_CLOCK;
> >> + priv->can.bittiming_const = &kvaser_usb_bittiming_const;
> >> + priv->can.do_set_bittiming = kvaser_usb_set_bittiming;
> >> + priv->can.do_set_mode = kvaser_usb_set_mode;
> >> + if (id->driver_info & KVASER_HAS_TXRX_ERRORS)
> >> + priv->can.do_get_berr_counter = kvaser_usb_get_berr_counter;
> >> + priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
> >> + if (id->driver_info & KVASER_HAS_SILENT_MODE)
> >> + priv->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
> >> +
> >> + netdev->flags |= IFF_ECHO;
> >> +
> >> + netdev->netdev_ops = &kvaser_usb_netdev_ops;
> >> +
> >> + SET_NETDEV_DEV(netdev, &intf->dev);
> >> +
> >> + dev->nets[channel] = priv;
> >> +
> >> + err = register_candev(netdev);
> >> + if (err) {
> >> + dev_err(&intf->dev, "Failed to register can device\n");
> >> + free_candev(netdev);
> >> + return err;
> >> + }
> >> +
> >> + netdev_dbg(netdev, "device registered\n");
> >> +
> >> + return 0;
> >> +}
> >> +
> >> +static void kvaser_usb_get_endpoints(const struct usb_interface *intf,
> >> + struct usb_endpoint_descriptor **in,
> >> + struct usb_endpoint_descriptor **out)
> >> +{
> >> + const struct usb_host_interface *iface_desc;
> >> + struct usb_endpoint_descriptor *endpoint;
> >> + int i;
> >> +
> >> + iface_desc = &intf->altsetting[0];
> >> +
> >> + for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
> >> + endpoint = &iface_desc->endpoint[i].desc;
> >> +
> >> + if (usb_endpoint_is_bulk_in(endpoint))
> >> + *in = endpoint;
> >> +
> >> + if (usb_endpoint_is_bulk_out(endpoint))
> >> + *out = endpoint;
> >> + }
> >> +}
> >> +
> >> +static int kvaser_usb_probe(struct usb_interface *intf,
> >> + const struct usb_device_id *id)
> >> +{
> >> + struct kvaser_usb *dev;
> >> + int err = -ENOMEM;
> >> + int i;
> >> +
> >> + dev = devm_kzalloc(&intf->dev, sizeof(*dev), GFP_KERNEL);
> >> + if (!dev)
> >> + return -ENOMEM;
> >> +
> >> + kvaser_usb_get_endpoints(intf, &dev->bulk_in, &dev->bulk_out);
> >> + if (!dev->bulk_in || !dev->bulk_out) {
> >> + dev_err(&intf->dev, "Cannot get usb endpoint(s)");
> >> + return err;
> >> + }
> >> +
> >> + dev->udev = interface_to_usbdev(intf);
> >> +
> >> + init_usb_anchor(&dev->rx_submitted);
> >> +
> >> + usb_set_intfdata(intf, dev);
> >> +
> >> + for (i = 0; i < MAX_NET_DEVICES; i++)
> >> + kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, i);
> >> +
> >> + err = kvaser_usb_get_software_info(dev);
> >> + if (err) {
> >> + dev_err(&intf->dev,
> >> + "Cannot get software infos, error %d\n", err);
> >> + return err;
> >> + }
> >> +
> >> + err = kvaser_usb_get_card_info(dev);
> >> + if (err) {
> >> + dev_err(&intf->dev,
> >> + "Cannot get card infos, error %d\n", err);
> >> + return err;
> >> + }
> >> +
> >> + dev_dbg(&intf->dev, "Firmware version: %d.%d.%d\n",
> >> + ((dev->fw_version >> 24) & 0xff),
> >> + ((dev->fw_version >> 16) & 0xff),
> >> + (dev->fw_version & 0xffff));
> >> +
> >> + for (i = 0; i < dev->nchannels; i++)
> >> + kvaser_usb_init_one(intf, id, i);
>
> Error checking is not needed?
Yes it is better to check that, I added it in the new version.
If I cannot initialize one of the "dev->nchannels" net interfaces, I
return an error in the probing function.
>
> >> +
> >> + return 0;
> >> +}
> >> +
> >> +static void kvaser_usb_disconnect(struct usb_interface *intf)
> >> +{
> >> + struct kvaser_usb *dev = usb_get_intfdata(intf);
> >> + int i;
> >> +
> >> + usb_set_intfdata(intf, NULL);
> >> +
> >> + if (!dev)
> >> + return;
> >> +
> >> + for (i = 0; i < dev->nchannels; i++) {
> >> + if (!dev->nets[i])
> >> + continue;
> >> +
> >> + unregister_netdev(dev->nets[i]->netdev);
> >> + }
> >> +
> >> + kvaser_usb_unlink_all_urbs(dev);
> >> +
> >> + for (i = 0; i < dev->nchannels; i++)
> >> + free_candev(dev->nets[i]->netdev);
> >> +}
> >> +
> >> +static struct usb_driver kvaser_usb_driver = {
> >> + .name = "kvaser_usb",
> >> + .probe = kvaser_usb_probe,
> >> + .disconnect = kvaser_usb_disconnect,
> >> + .id_table = kvaser_usb_table
> >> +};
> >> +
> >> +module_usb_driver(kvaser_usb_driver);
> >> +
> >> +MODULE_AUTHOR("Olivier Sobrie <olivier@...rie.be>");
> >> +MODULE_DESCRIPTION("CAN driver for Kvaser CAN/USB devices");
> >> +MODULE_LICENSE("GPL v2");
>
> Wolfgang.
>
Sorry for the delay... I was quite busy these last days.
I did the changes and fixes you proposed and will post right now a new
version of the driver. I hope I didn't forget anything.
Thank you,
--
Olivier
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