Commit ceabe10c authored by Ben Walker's avatar Ben Walker Committed by Vinod Koul
Browse files

dmaengine: at_hdmac: In atc_prep_dma_memset, treat value as a single byte 



The value passed in to .prep_dma_memset is to be treated as a single
byte repeating pattern.

Signed-off-by: default avatarBen Walker <benjamin.walker@intel.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20220301182551.883474-3-benjamin.walker@intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent fc44ff0a

drivers/dma/at_hdmac.c

+9 −1
Original line number Diff line number Diff line
@@ -942,6 +942,7 @@ atc_prep_dma_memset(struct dma_chan *chan, dma_addr_t dest, int value, 
	struct at_desc		*desc;

	void __iomem		*vaddr;

	dma_addr_t		paddr;

	char			fill_pattern;



	dev_vdbg(chan2dev(chan), "%s: d%pad v0x%x l0x%zx f0x%lx\n", __func__,

		&dest, value, len, flags);
@@ -963,7 +964,14 @@ atc_prep_dma_memset(struct dma_chan *chan, dma_addr_t dest, int value, 
			__func__);

		return NULL;

	}

	*(u32*)vaddr = value;



	/* Only the first byte of value is to be used according to dmaengine */

	fill_pattern = (char)value;



	*(u32*)vaddr = (fill_pattern << 24) |

		       (fill_pattern << 16) |

		       (fill_pattern << 8) |

		       fill_pattern;



	desc = atc_create_memset_desc(chan, paddr, dest, len);

	if (!desc) {