target/linux/bcm27xx/patches-5.15/950-0674-media-bcm2835-unicam-Set-ret-on-error-path-in-unicam.patch

   1 From 0cc1acc72364d72e8cae56ad6eea797bad00e3c5 Mon Sep 17 00:00:00 2001
   2 From: Nathan Chancellor <nathan@kernel.org>
   3 Date: Mon, 31 Jan 2022 17:23:38 -0700
   4 Subject: [PATCH] media: bcm2835-unicam: Set ret on error path in
   5  unicam_async_complete()
   6
   7 Clang warns:
   8
   9   drivers/media/platform/bcm2835/bcm2835-unicam.c:3109:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
  10           if (!source_pads) {
  11               ^~~~~~~~~~~~
  12   drivers/media/platform/bcm2835/bcm2835-unicam.c:3152:9: note: uninitialized use occurs here
  13           return ret;
  14                  ^~~
  15   drivers/media/platform/bcm2835/bcm2835-unicam.c:3109:2: note: remove the 'if' if its condition is always false
  16           if (!source_pads) {
  17           ^~~~~~~~~~~~~~~~~~~
  18   drivers/media/platform/bcm2835/bcm2835-unicam.c:3091:9: note: initialize the variable 'ret' to silence this warning
  19           int ret;
  20                  ^
  21                   = 0
  22   1 warning generated.
  23
  24 When the if condition is true, ret will be used uninitialized, which
  25 could result in undesirable behavior. Set ret to -ENODEV on the error
  26 path, which is a standard error code for the ->complete() callback.
  27
  28 Fixes: d056e86eb35f ("media/bcm2835-unicam: Parse pad numbers correctly")
  29 Signed-off-by: Nathan Chancellor <nathan@kernel.org>
  30 ---
  31  drivers/media/platform/bcm2835/bcm2835-unicam.c | 1 +
  32  1 file changed, 1 insertion(+)
  33
  34 --- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
  35 +++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
  36 @@ -3109,6 +3109,7 @@ static int unicam_async_complete(struct
  37         }
  38         if (!source_pads) {
  39                 unicam_err(unicam, "No source pads on sensor.\n");
  40 +               ret = -ENODEV;
  41                 goto unregister;
  42         }
  43