linux-wireless.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: YueHaibing <yuehaibing@huawei.com>
To: <davem@davemloft.net>, <kvalo@codeaurora.org>
Cc: <linux-kernel@vger.kernel.org>, <netdev@vger.kernel.org>,
	<linux-wireless@vger.kernel.org>, <wcn36xx@lists.infradead.org>,
	YueHaibing <yuehaibing@huawei.com>
Subject: [PATCH] wcn36xx: use dma_zalloc_coherent instead of allocator/memset
Date: Tue, 24 Jul 2018 19:52:11 +0800	[thread overview]
Message-ID: <20180724115211.19264-1-yuehaibing@huawei.com> (raw)

Use dma_zalloc_coherent instead of dma_alloc_coherent
followed by memset 0.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
 drivers/net/wireless/ath/wcn36xx/dxe.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/drivers/net/wireless/ath/wcn36xx/dxe.c b/drivers/net/wireless/ath/wcn36xx/dxe.c
index 06cfe8d..5ab3e31 100644
--- a/drivers/net/wireless/ath/wcn36xx/dxe.c
+++ b/drivers/net/wireless/ath/wcn36xx/dxe.c
@@ -174,13 +174,12 @@ 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;
 
@@ -628,13 +627,13 @@ int wcn36xx_dxe_allocate_mem_pools(struct wcn36xx *wcn)
 		16 - (WCN36XX_BD_CHUNK_SIZE % 8);
 
 	s = wcn->mgmt_mem_pool.chunk_size * WCN36XX_DXE_CH_DESC_NUMB_TX_H;
-	cpu_addr = dma_alloc_coherent(wcn->dev, s, &wcn->mgmt_mem_pool.phy_addr,
-				      GFP_KERNEL);
+	cpu_addr = dma_zalloc_coherent(wcn->dev, s,
+				       &wcn->mgmt_mem_pool.phy_addr,
+				       GFP_KERNEL);
 	if (!cpu_addr)
 		goto out_err;
 
 	wcn->mgmt_mem_pool.virt_addr = cpu_addr;
-	memset(cpu_addr, 0, s);
 
 	/* Allocate BD headers for DATA frames */
 
@@ -643,13 +642,13 @@ int wcn36xx_dxe_allocate_mem_pools(struct wcn36xx *wcn)
 		16 - (WCN36XX_BD_CHUNK_SIZE % 8);
 
 	s = wcn->data_mem_pool.chunk_size * WCN36XX_DXE_CH_DESC_NUMB_TX_L;
-	cpu_addr = dma_alloc_coherent(wcn->dev, s, &wcn->data_mem_pool.phy_addr,
-				      GFP_KERNEL);
+	cpu_addr = dma_zalloc_coherent(wcn->dev, s,
+				       &wcn->data_mem_pool.phy_addr,
+				       GFP_KERNEL);
 	if (!cpu_addr)
 		goto out_err;
 
 	wcn->data_mem_pool.virt_addr = cpu_addr;
-	memset(cpu_addr, 0, s);
 
 	return 0;
 
-- 
2.7.0

             reply	other threads:[~2018-07-24 12:58 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-24 11:52 YueHaibing [this message]
2018-08-24 11:50 ` Kalle Valo

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20180724115211.19264-1-yuehaibing@huawei.com \
    --to=yuehaibing@huawei.com \
    --cc=davem@davemloft.net \
    --cc=kvalo@codeaurora.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-wireless@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=wcn36xx@lists.infradead.org \
    --subject='Re: [PATCH] wcn36xx: use dma_zalloc_coherent instead of allocator/memset' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).