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* [PATCH] wireless: Use dma_zalloc_coherent instead of dma_alloc_coherent + memset
@ 2018-08-18 15:05 zhong jiang
  2018-08-18 18:29 ` Kalle Valo
  0 siblings, 1 reply; 4+ messages in thread
From: zhong jiang @ 2018-08-18 15:05 UTC (permalink / raw)
  To: kvalo, davem; +Cc: linux-kernel, netdev

dma_zalloc_coherent has implemented the dma_alloc_coherent() + memset (),
We prefer to dma_zalloc_coherent instead of open-codeing.

Signed-off-by: zhong jiang <zhongjiang@huawei.com>
---
 drivers/net/wireless/ath/wcn36xx/dxe.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/ath/wcn36xx/dxe.c b/drivers/net/wireless/ath/wcn36xx/dxe.c
index 06cfe8d..e66ddaa 100644
--- a/drivers/net/wireless/ath/wcn36xx/dxe.c
+++ b/drivers/net/wireless/ath/wcn36xx/dxe.c
@@ -174,13 +174,11 @@ static int wcn36xx_dxe_init_descs(struct device *dev, struct wcn36xx_dxe_ch *wcn
 	int i;
 
 	size = wcn_ch->desc_num * sizeof(struct wcn36xx_dxe_desc);
-	wcn_ch->cpu_addr = dma_alloc_coherent(dev, size, &wcn_ch->dma_addr,
-					      GFP_KERNEL);
+	wcn_ch->cpu_addr = dma_zalloc_coherent(dev, size, &wcn_ch->dma_addr,
+					       GFP_KERNEL);
 	if (!wcn_ch->cpu_addr)
 		return -ENOMEM;
 
-	memset(wcn_ch->cpu_addr, 0, size);
-
 	cur_dxe = (struct wcn36xx_dxe_desc *)wcn_ch->cpu_addr;
 	cur_ctl = wcn_ch->head_blk_ctl;
 
-- 
1.7.12.4

^ permalink raw reply related	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2018-08-20 10:53 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2018-08-18 15:05 [PATCH] wireless: Use dma_zalloc_coherent instead of dma_alloc_coherent + memset zhong jiang
2018-08-18 18:29 ` Kalle Valo
2018-08-18 18:31   ` Kalle Valo
2018-08-20 10:53     ` zhong jiang

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