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Date: Fri, 1 Nov 2013 11:16:45 +0100
From: Bjørn Mork <bjorn@...k.no>
To: netdev@...r.kernel.org
Cc: linux-usb@...r.kernel.org,
Alexey Orishko <alexey.orishko@...il.com>,
Bjørn Mork <bjorn@...k.no>
Subject: [PATCH net-next 08/24] net: cdc_ncm: remove ncm_parm field
Moving the call to cdc_ncm_setup() after the endpoint
setup removes the last remaining reference to ncm_parm
outside cdc_ncm_setup.
Collecting all the ncm_parm based calculations in
cdc_ncm_setup improves readability.
Cc: Alexey Orishko <alexey.orishko@...il.com>
Signed-off-by: Bjørn Mork <bjorn@...k.no>
---
drivers/net/usb/cdc_ncm.c | 46 +++++++++++++++++++++----------------------
include/linux/usb/cdc_ncm.h | 1 -
2 files changed, 23 insertions(+), 24 deletions(-)
diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c
index fc36a99..4de3a542 100644
--- a/drivers/net/usb/cdc_ncm.c
+++ b/drivers/net/usb/cdc_ncm.c
@@ -83,6 +83,7 @@ cdc_ncm_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
static u8 cdc_ncm_setup(struct usbnet *dev)
{
struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
+ struct usb_cdc_ncm_ntb_parameters ncm_parm;
u32 val;
u8 flags;
u8 iface_no;
@@ -97,22 +98,22 @@ static u8 cdc_ncm_setup(struct usbnet *dev)
err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS,
USB_TYPE_CLASS | USB_DIR_IN
|USB_RECIP_INTERFACE,
- 0, iface_no, &ctx->ncm_parm,
- sizeof(ctx->ncm_parm));
+ 0, iface_no, &ncm_parm,
+ sizeof(ncm_parm));
if (err < 0) {
pr_debug("failed GET_NTB_PARAMETERS\n");
return 1;
}
/* read correct set of parameters according to device mode */
- ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize);
- ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize);
- ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder);
- ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor);
- ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment);
+ ctx->rx_max = le32_to_cpu(ncm_parm.dwNtbInMaxSize);
+ ctx->tx_max = le32_to_cpu(ncm_parm.dwNtbOutMaxSize);
+ ctx->tx_remainder = le16_to_cpu(ncm_parm.wNdpOutPayloadRemainder);
+ ctx->tx_modulus = le16_to_cpu(ncm_parm.wNdpOutDivisor);
+ ctx->tx_ndp_modulus = le16_to_cpu(ncm_parm.wNdpOutAlignment);
/* devices prior to NCM Errata shall set this field to zero */
- ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams);
- ntb_fmt_supported = le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported);
+ ctx->tx_max_datagrams = le16_to_cpu(ncm_parm.wNtbOutMaxDatagrams);
+ ntb_fmt_supported = le16_to_cpu(ncm_parm.bmNtbFormatsSupported);
eth_hlen = ETH_HLEN;
min_dgram_size = CDC_NCM_MIN_DATAGRAM_SIZE;
@@ -153,7 +154,7 @@ static u8 cdc_ncm_setup(struct usbnet *dev)
}
/* inform device about NTB input size changes */
- if (ctx->rx_max != le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)) {
+ if (ctx->rx_max != le32_to_cpu(ncm_parm.dwNtbInMaxSize)) {
__le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max);
err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE,
@@ -171,6 +172,14 @@ static u8 cdc_ncm_setup(struct usbnet *dev)
pr_debug("Using default maximum transmit length=%d\n",
CDC_NCM_NTB_MAX_SIZE_TX);
ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX;
+
+ /* Adding a pad byte here simplifies the handling in
+ * cdc_ncm_fill_tx_frame, by making tx_max always
+ * represent the real skb max size.
+ */
+ if (ctx->tx_max % usb_maxpacket(dev->udev, dev->out, 1) == 0)
+ ctx->tx_max++;
+
}
/*
@@ -473,10 +482,6 @@ advance:
if (temp)
goto error2;
- /* initialize data interface */
- if (cdc_ncm_setup(dev))
- goto error2;
-
/* configure data interface */
temp = usb_set_interface(dev->udev, iface_no, data_altsetting);
if (temp)
@@ -487,6 +492,10 @@ advance:
if (!dev->in || !dev->out || !dev->status)
goto error2;
+ /* initialize data interface */
+ if (cdc_ncm_setup(dev))
+ goto error2;
+
dev->net->ethtool_ops = &cdc_ncm_ethtool_ops;
usb_set_intfdata(ctx->data, dev);
@@ -501,15 +510,6 @@ advance:
dev->rx_urb_size = ctx->rx_max;
- /* cdc_ncm_setup will override dwNtbOutMaxSize if it is
- * outside the sane range. Adding a pad byte here if necessary
- * simplifies the handling in cdc_ncm_fill_tx_frame, making
- * tx_max always represent the real skb max size.
- */
- if (ctx->tx_max != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) &&
- ctx->tx_max % usb_maxpacket(dev->udev, dev->out, 1) == 0)
- ctx->tx_max++;
-
return 0;
error2:
diff --git a/include/linux/usb/cdc_ncm.h b/include/linux/usb/cdc_ncm.h
index f14af3d..89b52a0 100644
--- a/include/linux/usb/cdc_ncm.h
+++ b/include/linux/usb/cdc_ncm.h
@@ -88,7 +88,6 @@
#define cdc_ncm_data_intf_is_mbim(x) ((x)->desc.bInterfaceProtocol == USB_CDC_MBIM_PROTO_NTB)
struct cdc_ncm_ctx {
- struct usb_cdc_ncm_ntb_parameters ncm_parm;
struct hrtimer tx_timer;
struct tasklet_struct bh;
--
1.7.10.4
--
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