From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> [ Upstream commit c24a5c735f87d0549060de31367c095e8810b895 ] The commit 080edf75d337 ("dmaengine: hsu: set HSU_CH_MTSR to memory width") has been mistakenly submitted. The further investigations show that the original code does better job since the memory side transfer size has never been configured by DMA users. As per latest revision of documentation: "Channel minimum transfer size (CHnMTSR)... For IOSF UART, maximum value that can be programmed is 64 and minimum value that can be programmed is 1." This reverts commit 080edf75d337d35faa6fc3df99342b10d2848d16. Fixes: 080edf75d337 ("dmaengine: hsu: set HSU_CH_MTSR to memory width") Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/dma/hsu/hsu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/dma/hsu/hsu.c b/drivers/dma/hsu/hsu.c index 202ffa9f7611..18f155a974db 100644 --- a/drivers/dma/hsu/hsu.c +++ b/drivers/dma/hsu/hsu.c @@ -64,10 +64,10 @@ static void hsu_dma_chan_start(struct hsu_dma_chan *hsuc) if (hsuc->direction == DMA_MEM_TO_DEV) { bsr = config->dst_maxburst; - mtsr = config->src_addr_width; + mtsr = config->dst_addr_width; } else if (hsuc->direction == DMA_DEV_TO_MEM) { bsr = config->src_maxburst; - mtsr = config->dst_addr_width; + mtsr = config->src_addr_width; } hsu_chan_disable(hsuc); -- 2.20.1