Add error handling for sq905c_command() failure in sq905c_dostream().
Log debug message with gspca_dbg() to prevent silent failure.

Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
---
 drivers/media/usb/gspca/sq905c.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/media/usb/gspca/sq905c.c b/drivers/media/usb/gspca/sq905c.c
index 6ca947aef298..7bb6b24c3ed1 100644
--- a/drivers/media/usb/gspca/sq905c.c
+++ b/drivers/media/usb/gspca/sq905c.c
@@ -183,7 +183,9 @@ static void sq905c_dostream(struct work_struct *work)
 quit_stream:
 	if (gspca_dev->present) {
 		mutex_lock(&gspca_dev->usb_lock);
-		sq905c_command(gspca_dev, SQ905C_CLEAR, 0);
+		ret = sq905c_command(gspca_dev, SQ905C_CLEAR, 0);
+		if (ret)
+			gspca_dbg(gspca_dev, D_STREAM, "Clear command failed\n");
 		mutex_unlock(&gspca_dev->usb_lock);
 	}
 	kfree(buffer);
-- 
2.42.0.windows.2

Hi Wentao Liang,

On 03/03/2025 16:23, Wentao Liang wrote:
> Add error handling for sq905c_command() failure in sq905c_dostream().
> Log debug message with gspca_dbg() to prevent silent failure.
> 
> Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
> ---
>  drivers/media/usb/gspca/sq905c.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/usb/gspca/sq905c.c b/drivers/media/usb/gspca/sq905c.c
> index 6ca947aef298..7bb6b24c3ed1 100644
> --- a/drivers/media/usb/gspca/sq905c.c
> +++ b/drivers/media/usb/gspca/sq905c.c
> @@ -183,7 +183,9 @@ static void sq905c_dostream(struct work_struct *work)
>  quit_stream:
>  	if (gspca_dev->present) {
>  		mutex_lock(&gspca_dev->usb_lock);
> -		sq905c_command(gspca_dev, SQ905C_CLEAR, 0);
> +		ret = sq905c_command(gspca_dev, SQ905C_CLEAR, 0);
> +		if (ret)
> +			gspca_dbg(gspca_dev, D_STREAM, "Clear command failed\n");

Thank you for this patch, but I'm not taking it, it just adds a debug message
for no good reason that I can see. It's a really old driver as well.

If you really want it, then post the patch again and explain why you want this in.

Regards,

	Hans

>  		mutex_unlock(&gspca_dev->usb_lock);
>  	}
>  	kfree(buffer);