diff options
| author | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-08-22 17:16:42 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-08-26 20:11:10 +0300 |
| commit | 95c520690f5fafb2cda2ec17f8c76ab3422b0174 (patch) | |
| tree | 0dec0f5683f21100b61b19a141512ebe0bac3aea /drivers/media/usb/pvrusb2/pvrusb2-v4l2.c | |
| parent | cce8ccca80d8388982133192d0a6d9dc2e8ed712 (diff) | |
| download | linux-95c520690f5fafb2cda2ec17f8c76ab3422b0174.tar.xz | |
media: don't do a 31 bit shift on a signed int
On 32-bits archs, a signed integer has 31 bits plus on extra
bit for signal. Due to that, touching the 32th bit with something
like:
int bar = 1 << 31;
has an undefined behavior in C on 32 bit architectures, as it
touches the signal bit. This is warned by cppcheck.
Instead, force the numbers to be unsigned, in order to solve this
issue.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media/usb/pvrusb2/pvrusb2-v4l2.c')
| -rw-r--r-- | drivers/media/usb/pvrusb2/pvrusb2-v4l2.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c b/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c index 0aff2f396392..a34717eba409 100644 --- a/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c +++ b/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c @@ -1003,7 +1003,7 @@ static int pvr2_v4l2_open(struct file *file) input_mask &= pvr2_hdw_get_input_available(hdw); input_cnt = 0; for (idx = 0; idx < (sizeof(input_mask) << 3); idx++) { - if (input_mask & (1 << idx)) input_cnt++; + if (input_mask & (1UL << idx)) input_cnt++; } fhp->input_cnt = input_cnt; fhp->input_map = kzalloc(input_cnt,GFP_KERNEL); @@ -1018,7 +1018,7 @@ static int pvr2_v4l2_open(struct file *file) } input_cnt = 0; for (idx = 0; idx < (sizeof(input_mask) << 3); idx++) { - if (!(input_mask & (1 << idx))) continue; + if (!(input_mask & (1UL << idx))) continue; fhp->input_map[input_cnt++] = idx; } |