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ion: Make user_ion_handle_put_nolock() a void function

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Clang warns:

  drivers/staging/android/ion/ion-ioctl.c:71:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
          if (--handle->user_ref_count == 0)
              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  drivers/staging/android/ion/ion-ioctl.c:74:9: note: uninitialized use occurs here
          return ret;
                 ^~~
  drivers/staging/android/ion/ion-ioctl.c:71:2: note: remove the 'if' if its condition is always true
          if (--handle->user_ref_count == 0)
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  drivers/staging/android/ion/ion-ioctl.c:69:9: note: initialize the variable 'ret' to silence this warning
          int ret;
                 ^
                  = 0
  1 warning generated.

The return value of user_ion_handle_put_nolock() is not checked in its
one call site in user_ion_free_nolock() so just make
user_ion_handle_put_nolock() return void to remove the warning.

Fixes: a8200613c8c9 ("ion: Protect kref from userspace manipulation")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nathan Chancellor 2022-07-27 09:46:17 -07:00 committed by Greg Kroah-Hartman
parent b7af7d6459
commit 99b85a87b1
1 changed files with 2 additions and 6 deletions
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8
drivers/staging/android/ion/ion-ioctl.c
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@ -64,14 +64,10 @@ static struct ion_handle *pass_to_user(struct ion_handle *handle)
}
/* Must hold the client lock */
static int user_ion_handle_put_nolock(struct ion_handle *handle)
static void user_ion_handle_put_nolock(struct ion_handle *handle)
{
int ret;
if (--handle->user_ref_count == 0)
ret = ion_handle_put_nolock(handle);
return ret;
ion_handle_put_nolock(handle);
}
static void user_ion_free_nolock(struct ion_client *client,