Hi Ben,
On 2016-6-7 21:37, Ben Dooks wrote:
The IDMAC_SET_BUFFER1_SIZE() macro modifies des1, but does
not check if the value being passed is big or little endian
desptire the des1 field being marked as __le32.
Looks good.
Reviewed-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
Test on Rockchip platform, so
Tested-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
Fix the issue by ensuring the values are changed from the
cpu endian to the descriptor endian by using cpu_to_le32.
Spotted whilst doing big endian conversion work on Exynos,
and stops the mmc worker thread from stalling.
Signed-off-by: Ben Dooks <ben.dooks@xxxxxxxxxxxxxxx>
---
Cc: Matthew Leach <matt.leach@xxxxxxxxxxxxxxx>
Cc: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
Cc: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Cc: linux-mmc@xxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
---
drivers/mmc/host/dw_mmc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 2cc6123..544397e 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -92,7 +92,7 @@ struct idmac_desc {
__le32 des1; /* Buffer sizes */
#define IDMAC_SET_BUFFER1_SIZE(d, s) \
- ((d)->des1 = ((d)->des1 & 0x03ffe000) | ((s) & 0x1fff))
+ ((d)->des1 = ((d)->des1 & cpu_to_le32(0x03ffe000)) | (cpu_to_le32((s) & 0x1fff)))
__le32 des2; /* buffer 1 physical address */
--
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