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Message-Id: <20201104064703.15123-16-himadrispandya@gmail.com>
Date: Wed, 4 Nov 2020 12:17:03 +0530
From: Himadri Pandya <himadrispandya@...il.com>
To: johan@...nel.org, gregkh@...uxfoundation.org,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: linux-kernel-mentees@...ts.linuxfoundation.org,
Himadri Pandya <himadrispandya@...il.com>
Subject: [PATCH 15/15] usb: serial: kl5kusb105: use usb_control_msg_recv() and usb_control_msg_send()
The new usb_control_msg_recv() and usb_control_msg_send() nicely wraps
usb_control_msg() with proper error check. Hence use the wrappers
instead of calling usb_control_msg() directly
Signed-off-by: Himadri Pandya <himadrispandya@...il.com>
---
drivers/usb/serial/kl5kusb105.c | 94 +++++++++++++++------------------
1 file changed, 44 insertions(+), 50 deletions(-)
diff --git a/drivers/usb/serial/kl5kusb105.c b/drivers/usb/serial/kl5kusb105.c
index 5ee48b0650c4..75cfd1c907f3 100644
--- a/drivers/usb/serial/kl5kusb105.c
+++ b/drivers/usb/serial/kl5kusb105.c
@@ -124,16 +124,17 @@ static int klsi_105_chg_port_settings(struct usb_serial_port *port,
{
int rc;
- rc = usb_control_msg(port->serial->dev,
- usb_sndctrlpipe(port->serial->dev, 0),
- KL5KUSB105A_SIO_SET_DATA,
- USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE,
- 0, /* value */
- 0, /* index */
- settings,
- sizeof(struct klsi_105_port_settings),
- KLSI_TIMEOUT);
- if (rc < 0)
+ rc = usb_control_msg_send(port->serial->dev, 0,
+ KL5KUSB105A_SIO_SET_DATA,
+ USB_TYPE_VENDOR | USB_DIR_OUT |
+ USB_RECIP_INTERFACE,
+ 0, /* value */
+ 0, /* index */
+ settings,
+ sizeof(struct klsi_105_port_settings),
+ KLSI_TIMEOUT,
+ GFP_KERNEL);
+ if (rc)
dev_err(&port->dev,
"Change port settings failed (error = %d)\n", rc);
@@ -167,28 +168,21 @@ static int klsi_105_get_line_state(struct usb_serial_port *port,
unsigned long *line_state_p)
{
int rc;
- u8 *status_buf;
+ u8 status_buf[2];
__u16 status;
- status_buf = kmalloc(KLSI_STATUSBUF_LEN, GFP_KERNEL);
- if (!status_buf)
- return -ENOMEM;
-
status_buf[0] = 0xff;
status_buf[1] = 0xff;
- rc = usb_control_msg(port->serial->dev,
- usb_rcvctrlpipe(port->serial->dev, 0),
- KL5KUSB105A_SIO_POLL,
- USB_TYPE_VENDOR | USB_DIR_IN,
- 0, /* value */
- 0, /* index */
- status_buf, KLSI_STATUSBUF_LEN,
- 10000
- );
- if (rc != KLSI_STATUSBUF_LEN) {
+ rc = usb_control_msg_recv(port->serial->dev, 0,
+ KL5KUSB105A_SIO_POLL,
+ USB_TYPE_VENDOR | USB_DIR_IN,
+ 0, /* value */
+ 0, /* index */
+ &status_buf, KLSI_STATUSBUF_LEN,
+ 10000,
+ GFP_KERNEL);
+ if (rc) {
dev_err(&port->dev, "reading line status failed: %d\n", rc);
- if (rc >= 0)
- rc = -EIO;
} else {
status = get_unaligned_le16(status_buf);
@@ -198,7 +192,6 @@ static int klsi_105_get_line_state(struct usb_serial_port *port,
*line_state_p = klsi_105_status2linestate(status);
}
- kfree(status_buf);
return rc;
}
@@ -283,16 +276,17 @@ static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port)
goto err_free_cfg;
}
- rc = usb_control_msg(port->serial->dev,
- usb_sndctrlpipe(port->serial->dev, 0),
- KL5KUSB105A_SIO_CONFIGURE,
- USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE,
- KL5KUSB105A_SIO_CONFIGURE_READ_ON,
- 0, /* index */
- NULL,
- 0,
- KLSI_TIMEOUT);
- if (rc < 0) {
+ rc = usb_control_msg_send(port->serial->dev, 0,
+ KL5KUSB105A_SIO_CONFIGURE,
+ USB_TYPE_VENDOR | USB_DIR_OUT |
+ USB_RECIP_INTERFACE,
+ KL5KUSB105A_SIO_CONFIGURE_READ_ON,
+ 0, /* index */
+ NULL,
+ 0,
+ KLSI_TIMEOUT,
+ GFP_KERNEL);
+ if (rc) {
dev_err(&port->dev, "Enabling read failed (error = %d)\n", rc);
retval = rc;
goto err_generic_close;
@@ -314,14 +308,14 @@ static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port)
return 0;
err_disable_read:
- usb_control_msg(port->serial->dev,
- usb_sndctrlpipe(port->serial->dev, 0),
+ usb_control_msg_send(port->serial->dev, 0,
KL5KUSB105A_SIO_CONFIGURE,
USB_TYPE_VENDOR | USB_DIR_OUT,
KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
0, /* index */
NULL, 0,
- KLSI_TIMEOUT);
+ KLSI_TIMEOUT,
+ GFP_KERNEL);
err_generic_close:
usb_serial_generic_close(port);
err_free_cfg:
@@ -335,15 +329,15 @@ static void klsi_105_close(struct usb_serial_port *port)
int rc;
/* send READ_OFF */
- rc = usb_control_msg(port->serial->dev,
- usb_sndctrlpipe(port->serial->dev, 0),
- KL5KUSB105A_SIO_CONFIGURE,
- USB_TYPE_VENDOR | USB_DIR_OUT,
- KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
- 0, /* index */
- NULL, 0,
- KLSI_TIMEOUT);
- if (rc < 0)
+ rc = usb_control_msg_send(port->serial->dev, 0,
+ KL5KUSB105A_SIO_CONFIGURE,
+ USB_TYPE_VENDOR | USB_DIR_OUT,
+ KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
+ 0, /* index */
+ NULL, 0,
+ KLSI_TIMEOUT,
+ GFP_KERNEL);
+ if (rc)
dev_err(&port->dev, "failed to disable read: %d\n", rc);
/* shutdown our bulk reads and writes */
--
2.17.1
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