linux-kernel - [PATCH] staging: rtl8712: consolidate kmalloc/memset 0 of array to kcalloc

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Date:	Mon,  4 Jan 2016 10:05:49 +0100
From:	Nicholas Mc Guire <hofrat@...dl.org>
To:	Larry Finger <Larry.Finger@...inger.net>
Cc:	Florian Schilhabel <florian.c.schilhabel@...glemail.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Luis de Bethencourt <luisbg@....samsung.com>,
	Gamze POLAT <gamzepolat94@...il.com>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	Nicholas Mc Guire <hofrat@...dl.org>
Subject: [PATCH] staging: rtl8712: consolidate kmalloc/memset 0 of array to kcalloc

This is an API consolidation only. The use of kmalloc of an array
of elements of equal size + memset to 0 of the same is equivalent to
kcalloc.

Signed-off-by: Nicholas Mc Guire <hofrat@...dl.org>
---
Found by coccinelle script (relaxed version of
scripts/coccinelle/api/alloc/kzalloc-simple.cocci)

Patch was compile tested with: x86_64_defconfig +
CONFIG_STAGING=y, CONFIG_R8712U=m

Patch is against linux-next (localversion-next is -next-20160104)

 drivers/staging/rtl8712/rtl871x_recv.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/staging/rtl8712/rtl871x_recv.c b/drivers/staging/rtl8712/rtl871x_recv.c
index 4ff5301..aa841bf 100644
--- a/drivers/staging/rtl8712/rtl871x_recv.c
+++ b/drivers/staging/rtl8712/rtl871x_recv.c
@@ -72,14 +72,12 @@ sint _r8712_init_recv_priv(struct recv_priv *precvpriv,
 	_init_queue(&precvpriv->recv_pending_queue);
 	precvpriv->adapter = padapter;
 	precvpriv->free_recvframe_cnt = NR_RECVFRAME;
-	precvpriv->pallocated_frame_buf = kmalloc(NR_RECVFRAME *
+	precvpriv->pallocated_frame_buf = kcalloc(NR_RECVFRAME,
 				sizeof(union recv_frame) + RXFRAME_ALIGN_SZ,
 				GFP_ATOMIC);
 	if (precvpriv->pallocated_frame_buf == NULL)
 		return _FAIL;
 	kmemleak_not_leak(precvpriv->pallocated_frame_buf);
-	memset(precvpriv->pallocated_frame_buf, 0, NR_RECVFRAME *
-		sizeof(union recv_frame) + RXFRAME_ALIGN_SZ);
 	precvpriv->precv_frame_buf = precvpriv->pallocated_frame_buf +
 				    RXFRAME_ALIGN_SZ -
 				    ((addr_t)(precvpriv->pallocated_frame_buf) &
-- 
2.1.4

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