lkml.org 
[lkml]   [2006]   [Dec]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patches in this message
/
From
SubjectRe: ieee80211 sleeping in invalid context
Date
On Tuesday 12 December 2006 05:06, Ray Lee wrote:
> Hey all, more data on my bcm43xx problem report from a few weeks back.
>
> By random chance I acquired a brain, and decided to rebuild my latest kernel

Congratulations to your decision ;)

> Dec 11 19:34:47 phoenix kernel: [ 57.044691] WARNING at kernel/mutex.c:132 __mutex_lock_common()
> Dec 11 19:34:47 phoenix kernel: [ 57.044694]

I'm not sure what's happening here. Either one of the following
assertions is failing:

038 #define spin_lock_mutex(lock, flags) \
039 do { \
040 struct mutex *l = container_of(lock, struct mutex, wait_lock); \
041 \
042 DEBUG_LOCKS_WARN_ON(in_interrupt()); \
043 local_irq_save(flags); \
044 __raw_spin_lock(&(lock)->raw_lock); \
045 DEBUG_LOCKS_WARN_ON(l->magic != l); \
046 } while (0)

Which kernel are you using?
There is some locking breakage in latest kernels with softmac.
I attached the fixes for the known bugs.






From: Michael Buesch <mb@bu3sch.de>
To: stable@kernel.org
Date: Sun, 10 Dec 2006 18:39:28 +0100
Message-Id: <200612101839.28687.mb@bu3sch.de>
Cc: Andrew Morton <akpm@osdl.org>, Johannes Berg <johannes@sipsolutions.net>, "John W. Linville" <linville@tuxdriver.com>, dsd@gentoo.org
Subject: ieee80211softmac: Fix mutex_lock at exit of ieee80211_softmac_get_genie

From: Ulrich Kunitz <kune@deine-taler.de>

ieee80211softmac_wx_get_genie locks the associnfo mutex at
function exit. This patch fixes it. The patch is against Linus'
tree (commit af1713e0).

Signed-off-by: Ulrich Kunitz <kune@deine-taler.de>
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
---
net/ieee80211/softmac/ieee80211softmac_wx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-2.6.19.1.orig/net/ieee80211/softmac/ieee80211softmac_wx.c
+++ linux-2.6.19.1/net/ieee80211/softmac/ieee80211softmac_wx.c
@@ -463,7 +463,7 @@ ieee80211softmac_wx_get_genie(struct net
err = -E2BIG;
}
spin_unlock_irqrestore(&mac->lock, flags);
- mutex_lock(&mac->associnfo.mutex);
+ mutex_unlock(&mac->associnfo.mutex);

return err;
}







From: Ulrich Kunitz <kune@deine-taler.de>

The signature of work functions changed recently from a context
pointer to the work structure pointer. This caused a problem in
the ieee80211softmac code, because the ieee80211softmac_assox_work
function has been called directly with a parameter explicitly
casted to (void*). This compiled correctly but resulted in a
softlock, because mutex_lock was called with the wrong memory
address. The patch fixes the problem. Another issue was a wrong
call of the schedule_work function. Softmac works again and this
fixes the problem I mentioned earlier in the zd1211rw rx tasklet
patch. The patch is against Linus' tree (commit af1713e0).

Signed-off-by: Ulrich Kunitz <kune@deine-taler.de>
Acked-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
---
John,

This patch should be pushed upstream to 2.6.20. At the moment, the work
struct changes have not yet propagated to wireless-2.6. When they do,
it will be needed there as well.

Larry

net/ieee80211/softmac/ieee80211softmac_assoc.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/net/ieee80211/softmac/ieee80211softmac_assoc.c b/net/ieee80211/softmac/ieee80211softmac_assoc.c
index eec1a1d..a824852 100644
--- a/net/ieee80211/softmac/ieee80211softmac_assoc.c
+++ b/net/ieee80211/softmac/ieee80211softmac_assoc.c
@@ -167,7 +167,7 @@ static void
ieee80211softmac_assoc_notify_scan(struct net_device *dev, int event_type, void *context)
{
struct ieee80211softmac_device *mac = ieee80211_priv(dev);
- ieee80211softmac_assoc_work((void*)mac);
+ ieee80211softmac_assoc_work(&mac->associnfo.work.work);
}

static void
@@ -177,7 +177,7 @@ ieee80211softmac_assoc_notify_auth(struc

switch (event_type) {
case IEEE80211SOFTMAC_EVENT_AUTHENTICATED:
- ieee80211softmac_assoc_work((void*)mac);
+ ieee80211softmac_assoc_work(&mac->associnfo.work.work);
break;
case IEEE80211SOFTMAC_EVENT_AUTH_FAILED:
case IEEE80211SOFTMAC_EVENT_AUTH_TIMEOUT:
@@ -438,7 +438,7 @@ ieee80211softmac_try_reassoc(struct ieee

spin_lock_irqsave(&mac->lock, flags);
mac->associnfo.associating = 1;
- schedule_work(&mac->associnfo.work);
+ schedule_delayed_work(&mac->associnfo.work, 0);
spin_unlock_irqrestore(&mac->lock, flags);
}

--
Greetings Michael.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-12-12 10:19    [W:0.056 / U:5.052 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site