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authorBen Walker <benjamin.walker@intel.com>2022-03-01 11:25:50 -0700
committerVinod Koul <vkoul@kernel.org>2022-04-20 17:28:12 +0530
commit3e0c06964bfcc8271a07065709452fcbc44e70b0 (patch)
tree196c5a3fa0b80ef4a9907f98e378edc863e28c84 /drivers/dma/at_xdmac.c
parentceabe10cf5d642b6ea80e77193f9cd4446df26b5 (diff)
dmaengine: at_xdmac: In at_xdmac_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: 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/20220301182551.883474-4-benjamin.walker@intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/at_xdmac.c')
-rw-r--r--drivers/dma/at_xdmac.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c
index 1476156af74b..1911861a39fa 100644
--- a/drivers/dma/at_xdmac.c
+++ b/drivers/dma/at_xdmac.c
@@ -1202,6 +1202,7 @@ static struct at_xdmac_desc *at_xdmac_memset_create_desc(struct dma_chan *chan,
unsigned long flags;
size_t ublen;
u32 dwidth;
+ char pattern;
/*
* WARNING: The channel configuration is set here since there is no
* dmaengine_slave_config call in this case. Moreover we don't know the
@@ -1244,10 +1245,16 @@ static struct at_xdmac_desc *at_xdmac_memset_create_desc(struct dma_chan *chan,
chan_cc |= AT_XDMAC_CC_DWIDTH(dwidth);
+ /* Only the first byte of value is to be used according to dmaengine */
+ pattern = (char)value;
+
ublen = len >> dwidth;
desc->lld.mbr_da = dst_addr;
- desc->lld.mbr_ds = value;
+ desc->lld.mbr_ds = (pattern << 24) |
+ (pattern << 16) |
+ (pattern << 8) |
+ pattern;
desc->lld.mbr_ubc = AT_XDMAC_MBR_UBC_NDV3
| AT_XDMAC_MBR_UBC_NDEN
| AT_XDMAC_MBR_UBC_NSEN