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media: usb: gspca: add a missed return-value check for do_command 

do_command() may fail. The fix adds the missed return value of
do_command(). If it fails, returns its error code.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Kangjie Lu 2018-12-25 01:31:21 -05:00 committed by Mauro Carvalho Chehab
parent 6f2c6afa79
commit 5ceaf5452c
1 changed files with 6 additions and 2 deletions
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8
drivers/media/usb/gspca/cpia1.c
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@ -547,10 +547,14 @@ static int do_command(struct gspca_dev *gspca_dev, u16 command,
}
if (sd->params.qx3.button) {
/* button pressed - unlock the latch */
do_command(gspca_dev, CPIA_COMMAND_WriteMCPort,
ret = do_command(gspca_dev, CPIA_COMMAND_WriteMCPort,
3, 0xdf, 0xdf, 0);
do_command(gspca_dev, CPIA_COMMAND_WriteMCPort,
if (ret)
return ret;
ret = do_command(gspca_dev, CPIA_COMMAND_WriteMCPort,
3, 0xff, 0xff, 0);
if (ret)
return ret;
}
/* test whether microscope is cradled */