tree 2fa59b4da78db338a84b5621be738d25a9bad609
parent e8be86c1d26c1e223c2b25fb33605ed83cf8acf3
author Vignesh Raghavendra <vigneshr@ti.com> 1584615819 +0530
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1601550758 +0200

serial: 8250: 8250_omap: Terminate DMA before pushing data on RX timeout

[ Upstream commit 7cf4df30a98175033e9849f7f16c46e96ba47f41 ]

Terminate and flush DMA internal buffers, before pushing RX data to
higher layer. Otherwise, this will lead to data corruption, as driver
would end up pushing stale buffer data to higher layer while actual data
is still stuck inside DMA hardware and has yet not arrived at the
memory.
While at that, replace deprecated dmaengine_terminate_all() with
dmaengine_terminate_async().

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/20200319110344.21348-2-vigneshr@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>