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| author | Alexandru Ardelean <alexandru.ardelean@analog.com> | 2019-03-26 16:05:20 +0200 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2019-04-24 11:08:38 +0530 |
| commit | 648865a79d8ee3d1aa64aab5eb2a9d12eeed14f9 (patch) | |
| tree | e14223fdd23d34867944778dd829d4afdaaa5dbc /drivers | |
| parent | 56009f0d2f54e4ce4305d65ce589eee6c22ac25f (diff) | |
| download | linux-648865a79d8ee3d1aa64aab5eb2a9d12eeed14f9.tar.bz2 | |
dmaengine: axi-dmac: Don't check the number of frames for alignment
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dma/dma-axi-dmac.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c index eecb367b4f3e..cdbef59a9542 100644 --- a/drivers/dma/dma-axi-dmac.c +++ b/drivers/dma/dma-axi-dmac.c @@ -526,7 +526,7 @@ 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) |