linux-kernel - Re: b43 locks the machine when resuming after suspend to disk

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Message-ID: <486C0206.7060606@lwfinger.net>
Date:	Wed, 02 Jul 2008 17:32:38 -0500
From:	Larry Finger <Larry.Finger@...inger.net>
To:	Johannes Berg <johannes@...solutions.net>
CC:	"Rafael J. Wysocki" <rjw@...k.pl>, debian-kernel@...ts.debian.org,
	Giacomo Mulas <gmulas@...astro.it>,
	Broadcom Linux <bcm43xx-dev@...ts.berlios.de>,
	linux-kernel@...r.kernel.org
Subject: Re: b43 locks the machine when resuming after suspend to disk

Johannes Berg wrote:
>>> I think you need the appended patch, but it only applies to linux-next.
>> A different version has been merged into what will become 2.6.26. I'll
>> see what we can do about stable.
> 
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=ef3a62d272f033989e83eb1f26505f93f93e3e69;hp=6d1a3fb567a728d31474636e167c324702a0c38b
> 
> Anybody have a stable tree around to see if that applies? I think it
> should.

It didn't, but this version will. It has been compile tested only.

Larry

===========================


Index: linux-2.6/net/mac80211/tx.c
===================================================================
--- linux-2.6.orig/net/mac80211/tx.c
+++ linux-2.6/net/mac80211/tx.c
@@ -1090,7 +1090,7 @@ static int ieee80211_tx(struct net_devic
  	ieee80211_tx_handler *handler;
  	struct ieee80211_txrx_data tx;
  	ieee80211_txrx_result res = TXRX_DROP, res_prepare;
-	int ret, i;
+	int ret, i, retries = 0;

  	WARN_ON(__ieee80211_queue_pending(local, control->queue));

@@ -1181,6 +1181,13 @@ retry:
  		if (!__ieee80211_queue_stopped(local, control->queue)) {
  			clear_bit(IEEE80211_LINK_STATE_PENDING,
  				  &local->state[control->queue]);
+			retries++;
+			/*
+			 * Driver bug, it's rejecting packets but
+			 * not stopping queues.
+			 */
+			if (WARN_ON_ONCE(retries > 5))
+				goto drop;
  			goto retry;
  		}
  		memcpy(&store->control, control,


View attachment "mac80211_tx_patch" of type "text/plain" (848 bytes)