| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 068/199] media: stkwebcam: Bugfix for wrong return values | Date | Thu, 19 Dec 2019 19:32:30 +0100 |
| |
From: Andreas Pape <ap@ca-pape.de>
[ Upstream commit 3c28b91380dd1183347d32d87d820818031ebecf ]
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> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/media/usb/stkwebcam/stk-webcam.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/media/usb/stkwebcam/stk-webcam.c b/drivers/media/usb/stkwebcam/stk-webcam.c index 7297fd261df94..f9844f87467b4 100644 --- a/drivers/media/usb/stkwebcam/stk-webcam.c +++ b/drivers/media/usb/stkwebcam/stk-webcam.c @@ -166,7 +166,11 @@ int stk_camera_read_reg(struct stk_camera *dev, u16 index, u8 *value) *value = *buf; kfree(buf); - return ret; + + if (ret < 0) + return ret; + else + return 0; } static int stk_start_stream(struct stk_camera *dev) -- 2.20.1
|