netdev - [PATCH] drivers/iwlwifi: use dma_zalloc

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Message-ID: <20111221002147.GA4996@dztty>
Date:	Wed, 21 Dec 2011 01:21:47 +0100
From:	Djalal Harouni <tixxdz@...ndz.org>
To:	Wey-Yi Guy <wey-yi.w.guy@...el.com>,
	Intel Linux Wireless <ilw@...ux.intel.com>,
	"John W. Linville" <linville@...driver.com>,
	linux-wireless@...r.kernel.org
Cc:	netdev@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] drivers/iwlwifi: use dma_zalloc_coherent() for DMA allocation

Replace dma_alloc_coherent()+memset() with the new dma_zalloc_coherent()

Signed-off-by: Djalal Harouni <tixxdz@...ndz.org>
---
 drivers/net/wireless/iwlwifi/iwl-trans-pcie.c |   10 ++++------
 1 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
index ce91898..4363da7 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
+++ b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
@@ -88,18 +88,16 @@ static int iwl_trans_rx_alloc(struct iwl_trans *trans)
 		return -EINVAL;
 
 	/* Allocate the circular buffer of Read Buffer Descriptors (RBDs) */
-	rxq->bd = dma_alloc_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE,
-				     &rxq->bd_dma, GFP_KERNEL);
+	rxq->bd = dma_zalloc_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE,
+				      &rxq->bd_dma, GFP_KERNEL);
 	if (!rxq->bd)
 		goto err_bd;
-	memset(rxq->bd, 0, sizeof(__le32) * RX_QUEUE_SIZE);
 
 	/*Allocate the driver's pointer to receive buffer status */
-	rxq->rb_stts = dma_alloc_coherent(dev, sizeof(*rxq->rb_stts),
-					  &rxq->rb_stts_dma, GFP_KERNEL);
+	rxq->rb_stts = dma_zalloc_coherent(dev, sizeof(*rxq->rb_stts),
+					   &rxq->rb_stts_dma, GFP_KERNEL);
 	if (!rxq->rb_stts)
 		goto err_rb_stts;
-	memset(rxq->rb_stts, 0, sizeof(*rxq->rb_stts));
 
 	return 0;
 
-- 
1.7.1
--
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