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| author | Tom Rix <trix@redhat.com> | 2020-08-10 21:25:18 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-08-29 08:16:16 +0200 |
| commit | 780d815dcc9b34d93ae69385a8465c38d423ff0f (patch) | |
| tree | d2144e3d3832c589bbe6d25cee54511b8257a915 /drivers/media/pci/tw5864 | |
| parent | media: MAINTAINERS: Remove broken bluecherry.net email (diff) | |
| download | linux-780d815dcc9b34d93ae69385a8465c38d423ff0f.tar.xz linux-780d815dcc9b34d93ae69385a8465c38d423ff0f.zip | |
media: tw5864: check status of tw5864_frameinterval_get
clang static analysis reports this problem
tw5864-video.c:773:32: warning: The left expression of the compound
assignment is an uninitialized value.
The computed value will also be garbage
fintv->stepwise.max.numerator *= std_max_fps;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^
stepwise.max is set with frameinterval, which comes from
ret = tw5864_frameinterval_get(input, &frameinterval);
fintv->stepwise.step = frameinterval;
fintv->stepwise.min = frameinterval;
fintv->stepwise.max = frameinterval;
fintv->stepwise.max.numerator *= std_max_fps;
When tw5864_frameinterval_get() fails, frameinterval is not
set. So check the status and fix another similar problem.
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/pci/tw5864')
| -rw-r--r-- | drivers/media/pci/tw5864/tw5864-video.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/media/pci/tw5864/tw5864-video.c b/drivers/media/pci/tw5864/tw5864-video.c index f4bc72bbe2c5..9131265c2b87 100644 --- a/drivers/media/pci/tw5864/tw5864-video.c +++ b/drivers/media/pci/tw5864/tw5864-video.c @@ -767,6 +767,9 @@ static int tw5864_enum_frameintervals(struct file *file, void *priv, fintv->type = V4L2_FRMIVAL_TYPE_STEPWISE; ret = tw5864_frameinterval_get(input, &frameinterval); + if (ret) + return ret; + fintv->stepwise.step = frameinterval; fintv->stepwise.min = frameinterval; fintv->stepwise.max = frameinterval; @@ -785,6 +788,9 @@ static int tw5864_g_parm(struct file *file, void *priv, cp->capability = V4L2_CAP_TIMEPERFRAME; ret = tw5864_frameinterval_get(input, &cp->timeperframe); + if (ret) + return ret; + cp->timeperframe.numerator *= input->frame_interval; cp->capturemode = 0; cp->readbuffers = 2; |