tree 52aa0b12ef6b9efa339f89cb59bcd1c585ab6477
parent a042865724d999842b8da435e3b3fa46e377cdc5
author Aditya Pakki <pakki001@umn.edu> 1552496141 -0500
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1559310511 -0700

spi : spi-topcliff-pch: Fix to handle empty DMA buffers

[ Upstream commit f37d8e67f39e6d3eaf4cc5471e8a3d21209843c6 ]

pch_alloc_dma_buf allocated tx, rx DMA buffers which can fail. Further,
these buffers are used without a check. The patch checks for these
failures and sends the error upstream.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>