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| author | Julia Lawall <Julia.Lawall@lip6.fr> | 2018-07-01 20:32:05 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-07-25 15:35:12 +0300 |
| commit | 2e3134caf63694bf1dbb2e68829871e14d543613 (patch) | |
| tree | 55db564e291bf8ef073c902ae49fb2a05f408038 /drivers | |
| parent | 5a1a2f63d840dc2631505b607e11ff65ac1b7d3c (diff) | |
| download | linux-2e3134caf63694bf1dbb2e68829871e14d543613.tar.xz | |
media: gspca_kinect: cast sizeof to int for comparison
Comparing an int to a size, which is unsigned, causes the int to become
unsigned, giving the wrong result. kinect_read returns the result of
usb_control_msg, which can return a negtive error code.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
int x;
expression e,e1;
identifier f;
@@
*x = f(...);
... when != x = e1
when != if (x < 0 || ...) { ... return ...; }
*x < sizeof(e)
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/usb/gspca/kinect.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/usb/gspca/kinect.c b/drivers/media/usb/gspca/kinect.c index 0cfdf8a1e19d..f993f6280c56 100644 --- a/drivers/media/usb/gspca/kinect.c +++ b/drivers/media/usb/gspca/kinect.c @@ -163,7 +163,7 @@ static int send_cmd(struct gspca_dev *gspca_dev, uint16_t cmd, void *cmdbuf, actual_len = kinect_read(udev, ibuf, 0x200); } while (actual_len == 0); gspca_dbg(gspca_dev, D_USBO, "Control reply: %d\n", actual_len); - if (actual_len < sizeof(*rhdr)) { + if (actual_len < (int)sizeof(*rhdr)) { pr_err("send_cmd: Input control transfer failed (%d)\n", actual_len); return actual_len < 0 ? actual_len : -EREMOTEIO; |