linux-kernel - [PATCH] rt2x00: rt2800: fix zeroing skb structure

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Date:	Sat, 30 Jul 2011 13:32:56 +0200
From:	Stanislaw Gruszka <sgruszka@...hat.com>
To:	Larry Finger <Larry.Finger@...inger.net>
Cc:	Justin Piszcz <jpiszcz@...idpixels.com>,
	Ivo van Doorn <IvDoorn@...il.com>,
	linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
	Alan Piszcz <ap@...arrain.com>,
	"users@...x00.serialmonkey.com" <users@...x00.serialmonkey.com>
Subject: [PATCH] rt2x00: rt2800: fix zeroing skb structure

We should clear skb->data not skb itself. Bug was introduced by:
commit 0b8004aa12d13ec750d102ba4082a95f0107c649 "rt2x00: Properly
reserve room for descriptors in skbs".

Cc: stable@...nel.org # 2.6.36+
Signed-off-by: Stanislaw Gruszka <sgruszka@...hat.com>
---
 drivers/net/wireless/rt2x00/rt2800lib.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index 75d2c6c..f94d669 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -703,8 +703,7 @@ void rt2800_write_beacon(struct queue_entry *entry, struct txentry_desc *txdesc)
 	/*
 	 * Add space for the TXWI in front of the skb.
 	 */
-	skb_push(entry->skb, TXWI_DESC_SIZE);
-	memset(entry->skb, 0, TXWI_DESC_SIZE);
+	memset(skb_push(entry->skb, TXWI_DESC_SIZE), 0, TXWI_DESC_SIZE);
 
 	/*
 	 * Register descriptor details in skb frame descriptor.
-- 
1.7.4

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