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| author | Hailong Liu <liu.hailong6@zte.com.cn> | 2018-07-20 08:31:56 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-21 08:45:24 +0200 |
| commit | e7de2590f18a272e63732b9d519250d1b522b2c4 (patch) | |
| tree | e0150900b0cebaae53db1a1dbd19ccafce7ded39 /drivers/uio | |
| parent | fbb5858c1467ef8feccc910ac9e9f529186a9f9d (diff) | |
| download | lwn-e7de2590f18a272e63732b9d519250d1b522b2c4.tar.gz lwn-e7de2590f18a272e63732b9d519250d1b522b2c4.zip | |
uio: fix wrong return value from uio_mmap()
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: 57c5f4df0a5a0ee ("uio: fix crash after the device is unregistered")
CC: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Hailong Liu <liu.hailong6@zte.com.cn>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Jiang Biao <jiang.biao2@zte.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/uio')
| -rw-r--r-- | drivers/uio/uio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index f63967c8e95a..144cf7365288 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -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 = { |