[PATCH] dmaengine: idxd: No need to clear memory after a dma_alloc_coherent() call

sunran001@208suo.com posted 1 patch 2 years, 6 months ago
drivers/dma/idxd/device.c | 1 -
1 file changed, 1 deletion(-)
[PATCH] dmaengine: idxd: No need to clear memory after a dma_alloc_coherent() call
Posted by sunran001@208suo.com 2 years, 6 months ago
dma_alloc_coherent() already clear the allocated memory, there is no 
need
to explicitly call memset().

Signed-off-by: Ran Sun <sunran001@208suo.com>
---
  drivers/dma/idxd/device.c | 1 -
  1 file changed, 1 deletion(-)

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 7c74bc60f582..72330876d40a 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -792,7 +792,6 @@ static int idxd_device_evl_setup(struct idxd_device 
*idxd)
  	evl->log_size = size;
  	evl->bmap = bmap;

-	memset(&evlcfg, 0, sizeof(evlcfg));
  	evlcfg.bits[0] = dma_addr & GENMASK(63, 12);
  	evlcfg.size = evl->size;
Re: [PATCH] dmaengine: idxd: No need to clear memory after a dma_alloc_coherent() call
Posted by Vinod Koul 2 years, 6 months ago
On 21-07-23, 07:35, sunran001@208suo.com wrote:
> dma_alloc_coherent() already clear the allocated memory, there is no need
> to explicitly call memset().

Please fix the sender name and resend. it should match s-o-b name

> 
> Signed-off-by: Ran Sun <sunran001@208suo.com>
> ---
>  drivers/dma/idxd/device.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
> index 7c74bc60f582..72330876d40a 100644
> --- a/drivers/dma/idxd/device.c
> +++ b/drivers/dma/idxd/device.c
> @@ -792,7 +792,6 @@ static int idxd_device_evl_setup(struct idxd_device
> *idxd)
>  	evl->log_size = size;
>  	evl->bmap = bmap;
> 
> -	memset(&evlcfg, 0, sizeof(evlcfg));
>  	evlcfg.bits[0] = dma_addr & GENMASK(63, 12);
>  	evlcfg.size = evl->size;

-- 
~Vinod
Re: [PATCH] dmaengine: idxd: No need to clear memory after a dma_alloc_coherent() call
Posted by Dave Jiang 2 years, 6 months ago

On 7/21/23 00:35, sunran001@208suo.com wrote:
> dma_alloc_coherent() already clear the allocated memory, there is no need
> to explicitly call memset().
> 
> Signed-off-by: Ran Sun <sunran001@208suo.com>

Reviewed-by: Dave Jiang <dave.jiang@intel.com>
> ---
>   drivers/dma/idxd/device.c | 1 -
>   1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
> index 7c74bc60f582..72330876d40a 100644
> --- a/drivers/dma/idxd/device.c
> +++ b/drivers/dma/idxd/device.c
> @@ -792,7 +792,6 @@ static int idxd_device_evl_setup(struct idxd_device 
> *idxd)
>       evl->log_size = size;
>       evl->bmap = bmap;
> 
> -    memset(&evlcfg, 0, sizeof(evlcfg));
>       evlcfg.bits[0] = dma_addr & GENMASK(63, 12);
>       evlcfg.size = evl->size;