Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.4 080/174] dmaengine: axi-dmac: Don't check the number of frames for alignment | Date | Thu, 16 Jan 2020 12:41:17 -0500 |
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From: Alexandru Ardelean <alexandru.ardelean@analog.com>
[ Upstream commit 648865a79d8ee3d1aa64aab5eb2a9d12eeed14f9 ]
In 2D transfers (for the AXI DMAC), the number of frames (numf) represents Y_LENGTH, and the length of a frame is X_LENGTH. 2D transfers are useful for video transfers where screen resolutions ( X * Y ) are typically aligned for X, but not for Y.
There is no requirement for Y_LENGTH to be aligned to the bus-width (or anything), and this is also true for AXI DMAC.
Checking the Y_LENGTH for alignment causes false errors when initiating DMA transfers. This change fixes this by checking only that the Y_LENGTH is non-zero.
Fixes: 0e3b67b348b8 ("dmaengine: Add support for the Analog Devices AXI-DMAC DMA controller") Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Signed-off-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/dma/dma-axi-dmac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c index 5b2395e7e04d..6de3d2142c7d 100644 --- a/drivers/dma/dma-axi-dmac.c +++ b/drivers/dma/dma-axi-dmac.c @@ -441,7 +441,7 @@ static struct dma_async_tx_descriptor *axi_dmac_prep_interleaved( if (chan->hw_2d) { if (!axi_dmac_check_len(chan, xt->sgl[0].size) || - !axi_dmac_check_len(chan, xt->numf)) + xt->numf == 0) return NULL; if (xt->sgl[0].size + dst_icg > chan->max_length || xt->sgl[0].size + src_icg > chan->max_length) -- 2.20.1
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