mwifiex: fix 11n rx packet drop issue
authorStone Piao <piaoyun@marvell.com>
Thu, 21 Jun 2012 03:21:10 +0000 (20:21 -0700)
committerJohn W. Linville <linville@tuxdriver.com>
Fri, 22 Jun 2012 17:59:49 +0000 (13:59 -0400)
commit925839243dc9aa4ef25305f5afd10ed18258a4ac
tree75c6750c9a7917b42f9d20a56a628b20087e25b9
parent8d6fcbdb4e039544e3f60a909a0cd819f3f68ad9
mwifiex: fix 11n rx packet drop issue

Currently we check the sequence number of last packet received
against start_win. If a sequence hole is detected, start_win is
updated to next sequence number.

Since the rx sequence number is initialized to 0, a corner case
exists when BA setup happens immediately after association. As
0 is a valid sequence number, start_win gets increased to 1
incorrectly. This causes the first packet with sequence number 0
being dropped.

Initialize rx sequence number as 0xffff and skip adjusting
start_win if the sequence number remains 0xffff. The sequence
number will be updated once the first packet is received.

Cc: "3.0.y, 3.1.y, 3.2.y, 3.3.y, 3.4.y" <stable@vger.kernel.org>
Signed-off-by: Stone Piao <piaoyun@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Kiran Divekar <dkiran@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/mwifiex/11n_rxreorder.c
drivers/net/wireless/mwifiex/11n_rxreorder.h
drivers/net/wireless/mwifiex/wmm.c