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Message-Id: <20201104064703.15123-7-himadrispandya@gmail.com>
Date: Wed, 4 Nov 2020 12:16:54 +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 06/15] usb: serial: f81232: 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/f81232.c | 88 ++++++++-----------------------------
1 file changed, 18 insertions(+), 70 deletions(-)
diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
index 0c7eacc630e0..78107feef8a8 100644
--- a/drivers/usb/serial/f81232.c
+++ b/drivers/usb/serial/f81232.c
@@ -139,71 +139,36 @@ static int calc_baud_divisor(speed_t baudrate, speed_t clockrate)
static int f81232_get_register(struct usb_serial_port *port, u16 reg, u8 *val)
{
int status;
- u8 *tmp;
struct usb_device *dev = port->serial->dev;
- tmp = kmalloc(sizeof(*val), GFP_KERNEL);
- if (!tmp)
- return -ENOMEM;
-
- status = usb_control_msg(dev,
- usb_rcvctrlpipe(dev, 0),
- F81232_REGISTER_REQUEST,
- F81232_GET_REGISTER,
- reg,
- 0,
- tmp,
- sizeof(*val),
- USB_CTRL_GET_TIMEOUT);
- if (status != sizeof(*val)) {
+ status = usb_control_msg_recv(dev, 0, F81232_REGISTER_REQUEST,
+ F81232_GET_REGISTER, reg, 0, val,
+ sizeof(*val), USB_CTRL_GET_TIMEOUT,
+ GFP_KERNEL);
+ if (status) {
dev_err(&port->dev, "%s failed status: %d\n", __func__, status);
- if (status < 0)
- status = usb_translate_errors(status);
- else
- status = -EIO;
- } else {
- status = 0;
- *val = *tmp;
+ status = usb_translate_errors(status);
}
- kfree(tmp);
return status;
}
static int f81232_set_register(struct usb_serial_port *port, u16 reg, u8 val)
{
int status;
- u8 *tmp;
struct usb_device *dev = port->serial->dev;
- tmp = kmalloc(sizeof(val), GFP_KERNEL);
- if (!tmp)
- return -ENOMEM;
-
- *tmp = val;
-
- status = usb_control_msg(dev,
- usb_sndctrlpipe(dev, 0),
- F81232_REGISTER_REQUEST,
- F81232_SET_REGISTER,
- reg,
- 0,
- tmp,
- sizeof(val),
- USB_CTRL_SET_TIMEOUT);
- if (status != sizeof(val)) {
+ status = usb_control_msg_send(dev, 0,
+ F81232_REGISTER_REQUEST,
+ F81232_SET_REGISTER, reg, 0,
+ &val, sizeof(val), USB_CTRL_SET_TIMEOUT,
+ GFP_KERNEL);
+ if (status) {
dev_err(&port->dev, "%s failed status: %d\n", __func__, status);
- if (status < 0)
- status = usb_translate_errors(status);
- else
- status = -EIO;
- } else {
- status = 0;
+ status = usb_translate_errors(status);
}
-
- kfree(tmp);
return status;
}
@@ -866,32 +831,16 @@ static int f81534a_ctrl_set_register(struct usb_interface *intf, u16 reg,
struct usb_device *dev = interface_to_usbdev(intf);
int retry = F81534A_ACCESS_REG_RETRY;
int status;
- u8 *tmp;
-
- tmp = kmemdup(val, size, GFP_KERNEL);
- if (!tmp)
- return -ENOMEM;
while (retry--) {
- status = usb_control_msg(dev,
- usb_sndctrlpipe(dev, 0),
- F81232_REGISTER_REQUEST,
- F81232_SET_REGISTER,
- reg,
- 0,
- tmp,
- size,
- USB_CTRL_SET_TIMEOUT);
- if (status < 0) {
+ status = usb_control_msg_send(dev, 0, F81232_REGISTER_REQUEST,
+ F81232_SET_REGISTER, reg, 0, val,
+ size, USB_CTRL_SET_TIMEOUT, GFP_KERNEL);
+ if (status) {
+ /* Retry on error or short transfers */
status = usb_translate_errors(status);
if (status == -EIO)
continue;
- } else if (status != size) {
- /* Retry on short transfers */
- status = -EIO;
- continue;
- } else {
- status = 0;
}
break;
@@ -902,7 +851,6 @@ static int f81534a_ctrl_set_register(struct usb_interface *intf, u16 reg,
reg, status);
}
- kfree(tmp);
return status;
}
--
2.17.1
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