* [PATCH -next] usb: serial: simplify the ark3116_write_reg()
@ 2020-12-09 9:29 Zheng Yongjun
2020-12-09 10:55 ` Johan Hovold
0 siblings, 1 reply; 2+ messages in thread
From: Zheng Yongjun @ 2020-12-09 9:29 UTC (permalink / raw)
To: johan, gregkh, linux-usb, linux-kernel; +Cc: Zheng Yongjun
Simplify the return expression.
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
---
drivers/usb/serial/ark3116.c | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)
diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c
index 71a9206ea1e2..0f9fa0e7c50e 100644
--- a/drivers/usb/serial/ark3116.c
+++ b/drivers/usb/serial/ark3116.c
@@ -77,16 +77,11 @@ struct ark3116_private {
static int ark3116_write_reg(struct usb_serial *serial,
unsigned reg, __u8 val)
{
- int result;
/* 0xfe 0x40 are magic values taken from original driver */
- result = usb_control_msg(serial->dev,
- usb_sndctrlpipe(serial->dev, 0),
- 0xfe, 0x40, val, reg,
- NULL, 0, ARK_TIMEOUT);
- if (result)
- return result;
-
- return 0;
+ return usb_control_msg(serial->dev,
+ usb_sndctrlpipe(serial->dev, 0),
+ 0xfe, 0x40, val, reg,
+ NULL, 0, ARK_TIMEOUT);
}
static int ark3116_read_reg(struct usb_serial *serial,
--
2.22.0
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH -next] usb: serial: simplify the ark3116_write_reg()
2020-12-09 9:29 [PATCH -next] usb: serial: simplify the ark3116_write_reg() Zheng Yongjun
@ 2020-12-09 10:55 ` Johan Hovold
0 siblings, 0 replies; 2+ messages in thread
From: Johan Hovold @ 2020-12-09 10:55 UTC (permalink / raw)
To: Zheng Yongjun; +Cc: johan, gregkh, linux-usb, linux-kernel
On Wed, Dec 09, 2020 at 05:29:17PM +0800, Zheng Yongjun wrote:
> Simplify the return expression.
>
> Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
> ---
> drivers/usb/serial/ark3116.c | 13 ++++---------
> 1 file changed, 4 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c
> index 71a9206ea1e2..0f9fa0e7c50e 100644
> --- a/drivers/usb/serial/ark3116.c
> +++ b/drivers/usb/serial/ark3116.c
> @@ -77,16 +77,11 @@ struct ark3116_private {
> static int ark3116_write_reg(struct usb_serial *serial,
> unsigned reg, __u8 val)
> {
> - int result;
> /* 0xfe 0x40 are magic values taken from original driver */
> - result = usb_control_msg(serial->dev,
> - usb_sndctrlpipe(serial->dev, 0),
> - 0xfe, 0x40, val, reg,
> - NULL, 0, ARK_TIMEOUT);
> - if (result)
> - return result;
Since none of the callers bother to check for errors, how about you add
a dev_err() here similar to the one in ark3116_read_reg() instead?
> -
> - return 0;
Keeping the explicit zero-return on success has the benefit of allowing
the casual developer to know what to expect when using this helper
without having to read the documentation (or implementation) of
usb_control_msg().
> + return usb_control_msg(serial->dev,
> + usb_sndctrlpipe(serial->dev, 0),
> + 0xfe, 0x40, val, reg,
> + NULL, 0, ARK_TIMEOUT);
> }
>
> static int ark3116_read_reg(struct usb_serial *serial,
Johan
^ permalink raw reply [flat|nested] 2+ messages in thread
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