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author | Vignesh R <vigneshr@ti.com> | 2019-01-15 12:28:32 +0530 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-01 09:14:14 +0100 |
commit | 13ae5985660904a43880850a22fe73d80381bb95 (patch) | |
tree | ad1fe8bb0391d3e43f32b7446fde0a8b7020f0fd /drivers/i2c | |
parent | a2d8b2fa76db5aee9f742645519a68c49a9178d3 (diff) |
spi: omap2-mcspi: Fix DMA and FIFO event trigger size mismatch
[ Upstream commit baf8b9f8d260c55a86405f70a384c29cda888476 ]
Commit b682cffa3ac6 ("spi: omap2-mcspi: Set FIFO DMA trigger level to word length")
broke SPI transfers where bits_per_word != 8. This is because of
mimsatch between McSPI FIFO level event trigger size (SPI word length) and
DMA request size(word length * maxburst). This leads to data
corruption, lockup and errors like:
spi1.0: EOW timed out
Fix this by setting DMA maxburst size to 1 so that
McSPI FIFO level event trigger size matches DMA request size.
Fixes: b682cffa3ac6 ("spi: omap2-mcspi: Set FIFO DMA trigger level to word length")
Cc: stable@vger.kernel.org
Reported-by: David Lechner <david@lechnology.com>
Tested-by: David Lechner <david@lechnology.com>
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/i2c')
0 files changed, 0 insertions, 0 deletions