Re: 2.6.7-mm6: system hang with KAMix on dual Opteron w/ NUMA

[Andrew Morton]

"R. J. Wysocki" <rjwysocki@xxxxxxx> wrote:
>
>  I've just discovered that I'm (consistently) able to hang the system solid by 
>  trying to adjust the sound volume using KAMix on 2.6.7-mm6 (SuSE 9.1/ AMD64).  

Please ensure that your kernel has this patch:

--- 25/sound/core/control.c~snd_ctl_read-locking-fix-fix	2004-07-06 21:27:51.618683360 -0700
+++ 25-akpm/sound/core/control.c	2004-07-06 21:27:51.622682752 -0700
@@ -1116,7 +1116,7 @@ static ssize_t snd_ctl_read(struct file 
 			wait_queue_t wait;
 			if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
 				err = -EAGAIN;
-				goto out;
+				goto __end;
 			}
 			init_waitqueue_entry(&wait, current);
 			add_wait_queue(&ctl->change_sleep, &wait);
@@ -1137,7 +1137,7 @@ static ssize_t snd_ctl_read(struct file 
 		kfree(kev);
 		if (copy_to_user(buffer, &ev, sizeof(snd_ctl_event_t))) {
 			err = -EFAULT;
-			goto __end;
+			goto out;
 		}
 		spin_lock_irq(&ctl->read_lock);
 		buffer += sizeof(snd_ctl_event_t);
_

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