Re: 2.6.12-rc1-mm2

From: Laurent Riffard
Date: Fri Mar 25 2005 - 13:03:10 EST



Le 25.03.2005 02:00, Patrick Mochel a écrit :
On Thu, 24 Mar 2005, Andrew Morton wrote:


Laurent Riffard <laurent.riffard@xxxxxxx> wrote:

hello,

Same kinds of problem here. It depends on the removed module. I
mean: "rmmod loop" or "rmmod pcspkr" works. But "rmmod
snd_ens1371" or "rmmod ohci1394" hangs.

Sysrq-T when rmmoding snd_ens1371 :

<snip>

It looks like we're getting stuck in the wait_for_completion() in
the new klist_remove().

D'oh! It's getting hung while waiting to remove the current node from
the list (which it can't remove because it's being used). The patch
below should fix it.

Pat


===== drivers/base/dd.c 1.3 vs edited =====
--- 1.3/drivers/base/dd.c 2005-03-21 12:25:04 -08:00
+++ edited/drivers/base/dd.c 2005-03-24 16:55:21 -08:00
@@ -177,7 +177,7 @@

sysfs_remove_link(&drv->kobj, kobject_name(&dev->kobj));
sysfs_remove_link(&dev->kobj, "driver");
- klist_remove(&dev->knode_driver);
+ klist_del(&dev->knode_driver);

down(&dev->sem);
device_detach_shutdown(dev);

Ok, I can confirm this patch solved the problem.

Thanks for your help.
--
laurent

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