linux-kernel - [28/70] staging: brcm80211: bugfix for softmac crash on multi cpu configurations

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Message-Id: <20110222221839.853712243@clark.kroah.org>
Date:	Tue, 22 Feb 2011 14:17:07 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Roland Vossen <rvossen@...adcom.com>,
	Brett Rudley <brudley@...adcom.com>,
	Arend van Spriel <arend@...adcom.com>
Subject: [28/70] staging: brcm80211: bugfix for softmac crash on multi cpu configurations

2.6.37-stable review patch.  If anyone has any objections, please let us know.

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

From: Roland Vossen <rvossen@...adcom.com>

commit 6a3be6e6e7feb4cb35275475d6a863b748d59cc3 upstream.

Solved a locking issue that resulted in driver crashes with the 43224 and 43225
chips. The problem has been reported on several fora. Root cause was two fold:
hardware was being manipulated by two unsynchronized threads, and a scan
operation could interfere with an ongoing dynamic calibration process. Fix was
to invoke a lock on wl_ops_config() operation and to set internal flags when a
scan operation is started and stopped.

Please add this to the staging-linus branch.

Signed-off-by: Roland Vossen <rvossen@...adcom.com>
Acked-by: Brett Rudley <brudley@...adcom.com>
Signed-off-by: Arend van Spriel <arend@...adcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>


---
 drivers/staging/brcm80211/sys/wlc_mac80211.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/staging/brcm80211/sys/wlc_mac80211.c
+++ b/drivers/staging/brcm80211/sys/wlc_mac80211.c
@@ -5336,7 +5336,6 @@ wlc_sendpkt_mac80211(wlc_info_t *wlc, vo
 	fifo = prio2fifo[prio];
 
 	ASSERT((uint) PKTHEADROOM(sdu) >= TXOFF);
-	ASSERT(!PKTSHARED(sdu));
 	ASSERT(!PKTNEXT(sdu));
 	ASSERT(!PKTLINK(sdu));
 	ASSERT(fifo < NFIFO);


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