[media] sr030pc30: don't read a new pointer
sr030pc30_get_fmt() can only succeed if both info->curr_win and
info->curr_fmt are not NULL.
If one of those vars are null, the curent code would call:
ret = sr030pc30_set_params(sd);
If the curr_win is null, it will return -EINVAL, as it would be
expected. However, if curr_fmt is NULL, the function won't
set it.
The code will then try to read from it:
mf->code = info->curr_fmt->code;
mf->colorspace = info->curr_fmt->colorspace;
with obviouly won't work.
This got reported by smatch:
drivers/media/i2c/sr030pc30.c:505 sr030pc30_get_fmt() error: we previously assumed 'info->curr_win' could be null (see line 499)
drivers/media/i2c/sr030pc30.c:507 sr030pc30_get_fmt() error: we previously assumed 'info->curr_fmt' could be null (see line 499)
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/drivers/media/i2c/sr030pc30.c b/drivers/media/i2c/sr030pc30.c
index 229dc76..b04c09d 100644
--- a/drivers/media/i2c/sr030pc30.c
+++ b/drivers/media/i2c/sr030pc30.c
@@ -489,18 +489,14 @@
{
struct v4l2_mbus_framefmt *mf;
struct sr030pc30_info *info = to_sr030pc30(sd);
- int ret;
if (!format || format->pad)
return -EINVAL;
mf = &format->format;
- if (!info->curr_win || !info->curr_fmt) {
- ret = sr030pc30_set_params(sd);
- if (ret)
- return ret;
- }
+ if (!info->curr_win || !info->curr_fmt)
+ return -EINVAL;
mf->width = info->curr_win->width;
mf->height = info->curr_win->height;