linux-kernel - [PATCH 3.2 050/185] mwifiex: correct packet length for packets from SDIO interface

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Message-ID: <lsq.1388282923.365685007@decadent.org.uk>
Date:	Sun, 29 Dec 2013 03:08:43 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org,
	"John W. Linville" <linville@...driver.com>,
	"Avinash Patil" <patila@...vell.com>,
	"Bing Zhao" <bzhao@...vell.com>
Subject: [PATCH 3.2 050/185] mwifiex: correct packet length for packets
 from SDIO interface

3.2.54-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Avinash Patil <patila@...vell.com>

commit d03b4aa77e1187b77dfe37d14a923547f00baa66 upstream.

While receiving a packet on SDIO interface, we allocate skb with
size multiple of SDIO block size. We need to resize this skb
after RX using packet length from RX header.

Signed-off-by: Avinash Patil <patila@...vell.com>
Signed-off-by: Bing Zhao <bzhao@...vell.com>
Signed-off-by: John W. Linville <linville@...driver.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/net/wireless/mwifiex/sdio.c | 3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/wireless/mwifiex/sdio.c
+++ b/drivers/net/wireless/mwifiex/sdio.c
@@ -936,7 +936,10 @@ static int mwifiex_decode_rx_packet(stru
 				    struct sk_buff *skb, u32 upld_typ)
 {
 	u8 *cmd_buf;
+	__le16 *curr_ptr = (__le16 *)skb->data;
+	u16 pkt_len = le16_to_cpu(*curr_ptr);
 
+	skb_trim(skb, pkt_len);
 	skb_pull(skb, INTF_HEADER_LEN);
 
 	switch (upld_typ) {

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