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Commit 4ea8c205 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Tejun Heo
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ata: sata_dwc_460ex: burst size must be in items not bytes 



The burst size as defined by DMAengine API is in items of address width. Derive
burst size from AHB_DMA_BRST_DFLT (64 bytes) by dividing it to
DMA_SLAVE_BUSWIDTH_4_BYTES (4 bytes) that gives us 16 items.

Tested-by: default avatarChristian Lamparter <chunkeey@googlemail.com>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 6689dfac

drivers/ata/sata_dwc_460ex.c

+3 −3
Original line number Diff line number Diff line
@@ -318,8 +318,8 @@ static struct dma_async_tx_descriptor *dma_dwc_xfer_setup(struct ata_queued_cmd 
	}



	sconf.direction = qc->dma_dir;

	sconf.src_maxburst = AHB_DMA_BRST_DFLT;

	sconf.dst_maxburst = AHB_DMA_BRST_DFLT;

	sconf.src_maxburst = AHB_DMA_BRST_DFLT / 4;	/* in items */

	sconf.dst_maxburst = AHB_DMA_BRST_DFLT / 4;	/* in items */

	sconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;

	sconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;