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media: stkwebcam: Bugfix for wrong return values 

usb_control_msg returns in case of a successfully sent message the number
of sent bytes as a positive number. Don't use this value as a return value
for stk_camera_read_reg, as a non-zero return value is used as an error
condition in some cases when stk_camera_read_reg is called.

Signed-off-by: Andreas Pape <ap@ca-pape.de>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Andreas Pape 2018-11-23 11:14:54 -05:00 committed by Mauro Carvalho Chehab
parent 2bf47eefca
commit 3c28b91380
1 changed files with 5 additions and 1 deletions
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4
drivers/media/usb/stkwebcam/stk-webcam.c
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@ -171,7 +171,11 @@ int stk_camera_read_reg(struct stk_camera *dev, u16 index, u8 *value)
*value = *buf; *value = *buf;
kfree(buf); kfree(buf);
if (ret < 0)
return ret; return ret;
else
return 0;
} }
static int stk_start_stream(struct stk_camera *dev) static int stk_start_stream(struct stk_camera *dev)