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uio: fix wrong return value from uio_mmap()

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uio_mmap has multiple fail paths to set return value to nonzero then
goto out. However, it always returns *0* from the *out* at end, and
this will mislead callers who check the return value of this function.

Fixes: 57c5f4df0a ("uio: fix crash after the device is unregistered")
CC: Xiubo Li <[email protected]>
Signed-off-by: Hailong Liu <[email protected]>
Cc: stable <[email protected]>
Signed-off-by: Jiang Biao <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Hailong Liu 2018-07-20 08:31:56 +08:00 • committed by Greg Kroah-Hartman
commit e7de2590f1
1 changed files with 1 additions and 1 deletions
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2
drivers/uio/uio.c
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@ -813,7 +813,7 @@ static int uio_mmap(struct file *filep, struct vm_area_struct *vma)
out:
mutex_unlock(&idev->info_lock);
return 0;
return ret;
}
static const struct file_operations uio_fops = {