[ Upstream commit 99c66bc051e7407fe0bf0607b142ec0be1a1d1dd ]

Prevents deadlock when fifo is full and reader closes file.
Signed-off-by: NKristian H. Kristensen <hoegsberg@chromium.org>
Signed-off-by: NRob Clark <robdclark@gmail.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>