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| author | Andreas Pape <ap@ca-pape.de> | 2018-11-23 19:14:54 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-13 10:52:28 +0300 |
| commit | 8eccf35a6ff771f831587953dd5b3c659ad16e11 (patch) | |
| tree | 4eee5774392e4552b7c7421f30483b2c88c29f96 /drivers/media/usb/stkwebcam/stk-webcam.c | |
| parent | 50e9fda8654bf1c4a9239c253f99350b392842c1 (diff) | |
| download | linux-8eccf35a6ff771f831587953dd5b3c659ad16e11.tar.xz | |
media: stkwebcam: Bugfix for wrong return values
[ 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>
Diffstat (limited to 'drivers/media/usb/stkwebcam/stk-webcam.c')
| -rw-r--r-- | drivers/media/usb/stkwebcam/stk-webcam.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/media/usb/stkwebcam/stk-webcam.c b/drivers/media/usb/stkwebcam/stk-webcam.c index 6e3f234e790b..e33fa78ef98d 100644 --- a/drivers/media/usb/stkwebcam/stk-webcam.c +++ b/drivers/media/usb/stkwebcam/stk-webcam.c @@ -164,7 +164,11 @@ 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) |