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>

diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c
index eecb367..cdbef59 100644 (file)
--- 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)