korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-11 21:38:32 +08:00
Code Issues Packages Projects Releases Wiki Activity

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

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

Signed-off-by: Ben 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: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Ben Walker 2022-03-01 11:25:49 -07:00 committed by Vinod Koul
parent fc44ff0ae9
commit ceabe10cf5
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/dma/at_hdmac.c
View File

@ -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) {