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authorArjan van de Ven <arjan@infradead.org>2006-07-03 11:25:36 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-04 02:27:10 +0400
commitcd11acdd8542cb0c0fa7cd86590b1ba79d7e263a (patch)
tree0b3fd5ec340e05ea831fa24f46806350838bb296 /drivers/net/3c527.c
parenta5b5bb9a053a973c23b867738c074acb3e80c0a0 (diff)
downloadlinux-cd11acdd8542cb0c0fa7cd86590b1ba79d7e263a.tar.xz
[PATCH] lockdep: annotate hostap netdev ->xmit_lock
On Fri, 2006-06-30 at 15:45 -0700, Miles Lane wrote: > Okay, I rebuilt my kernel with your combo patch applied. > Then, I inserted my US Robotics USR2210 PCMCIA wifi card, > ran "pccardutil eject", popped out the card and then inserted > a Compaq iPaq wifi card. This triggered the following. > > [ INFO: possible circular locking dependency detected ] > ------------------------------------------------------- > syslogd/1886 is trying to acquire lock: > (&dev->queue_lock){-+..}, at: [<c11a50b5>] dev_queue_xmit+0x120/0x24b > > but task is already holding lock: > (&dev->_xmit_lock){-+..}, at: [<c11a5118>] dev_queue_xmit+0x183/0x24b > > which lock already depends on the new lock. ok this appears to be hostap playing games... it has 2 network devices for one piece of hardware and one calls the other via the networking layer; there is thankfully a natural ordering between the two, so just making the slave one a separate type ought to make this work. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: "John W. Linville" <linville@tuxdriver.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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