Re: [PATCH 2/4] dmaengine: at_xdmac: fix AT_XDMAC_CC_PERID() macro
From: <hidden>
Date: 2021-10-15 07:51:09
Also in:
linux-arm-kernel, lkml
On 10/7/21 2:12 PM, Claudiu Beznea wrote:
AT_XDMAC_CC_PERID() should be used to setup bits 24..30 of XDMAC_CC
register. Using it without parenthesis around 0x7f & (i) will lead to
setting all the time zero for bits 24..30 of XDMAC_CC as the << operator
has higher precedence over bitwise &. Thus, add paranthesis around
0x7f & (i).
Fixes: 15a03850ab8f ("dmaengine: at_xdmac: fix macro typo")
Signed-off-by: Claudiu Beznea <redacted>Reviewed-by: Tudor Ambarus <redacted>
quoted hunk ↗ jump to hunk
--- drivers/dma/at_xdmac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c index c66ad5706cb5..e18abbd56fb5 100644 --- a/drivers/dma/at_xdmac.c +++ b/drivers/dma/at_xdmac.c@@ -155,7 +155,7 @@ #define AT_XDMAC_CC_WRIP (0x1 << 23) /* Write in Progress (read only) */ #define AT_XDMAC_CC_WRIP_DONE (0x0 << 23) #define AT_XDMAC_CC_WRIP_IN_PROGRESS (0x1 << 23) -#define AT_XDMAC_CC_PERID(i) (0x7f & (i) << 24) /* Channel Peripheral Identifier */ +#define AT_XDMAC_CC_PERID(i) ((0x7f & (i)) << 24) /* Channel Peripheral Identifier */ #define AT_XDMAC_CDS_MSP 0x2C /* Channel Data Stride Memory Set Pattern */ #define AT_XDMAC_CSUS 0x30 /* Channel Source Microblock Stride */ #define AT_XDMAC_CDUS 0x34 /* Channel Destination Microblock Stride */