On Thu, 12 Oct 2000, David Woodhouse wrote:
> > * USB: system hang with USB audio driver {CRITICAL} (David
> > Woodhouse, Randy Dunlap, Narayan Desai)
>
> That fixes failure mode #1, in which the NMI watchdog gets triggered and
> all subsequent attempts to open /dev/audio just block.
>
> Unfortunately, it doesn't affect failure mode #2, in which the machine
> just dies completely.
OK. This patch fixes failure mode #2 too - and lets it make noise without
locking up the machine. By including the extra lines which Randy Dunlap
sent me, it even makes the _right_ noise.
My only remaining problem is that I've just woken She Who Must Be Obeyed
by playing Terrorvision very loudly at 1 am.
Index: drivers/usb/audio.c
===================================================================
RCS file: /net/passion/inst/cvs/linux/drivers/usb/audio.c,v
retrieving revision 1.1.2.31
diff -u -r1.1.2.31 audio.c
--- drivers/usb/audio.c 2000/09/07 08:26:12 1.1.2.31
+++ drivers/usb/audio.c 2000/10/13 00:06:04
@@ -879,6 +879,7 @@
mask = 0;
printk(KERN_ERR "usbin_completed: panic: unknown URB\n");
}
+ urb->dev = as->state->usbdev;
spin_lock_irqsave(&as->lock, flags);
if (!usbin_retire_desc(u, urb) &&
u->flags & FLG_RUNNING &&
@@ -943,6 +944,7 @@
mask = 0;
printk(KERN_ERR "usbin_sync_completed: panic: unknown URB\n");
}
+ urb->dev = as->state->usbdev;
spin_lock_irqsave(&as->lock, flags);
if (!usbin_sync_retire_desc(u, urb) &&
u->flags & FLG_RUNNING &&
@@ -1007,8 +1009,10 @@
}
spin_lock_irqsave(&as->lock, flags);
}
- if (u->dma.count >= u->dma.dmasize && !u->dma.mapped)
+ if (u->dma.count >= u->dma.dmasize && !u->dma.mapped) {
+ spin_unlock_irqrestore(&as->lock, flags);
return 0;
+ }
u->flags |= FLG_RUNNING;
if (!(u->flags & FLG_URB0RUNNING)) {
urb = &u->durb[0].urb;
@@ -1233,6 +1237,7 @@
mask = 0;
printk(KERN_ERR "usbout_completed: panic: unknown URB\n");
}
+ urb->dev = as->state->usbdev;
spin_lock_irqsave(&as->lock, flags);
if (!usbout_retire_desc(u, urb) &&
u->flags & FLG_RUNNING &&
@@ -1304,6 +1309,7 @@
mask = 0;
printk(KERN_ERR "usbout_sync_completed: panic: unknown URB\n");
}
+ urb->dev = as->state->usbdev;
spin_lock_irqsave(&as->lock, flags);
if (!usbout_sync_retire_desc(u, urb) &&
u->flags & FLG_RUNNING &&
@@ -1368,8 +1374,10 @@
}
spin_lock_irqsave(&as->lock, flags);
}
- if (u->dma.count <= 0 && !u->dma.mapped)
+ if (u->dma.count <= 0 && !u->dma.mapped) {
+ spin_unlock_irqrestore(&as->lock, flags);
return 0;
+ }
u->flags |= FLG_RUNNING;
if (!(u->flags & FLG_URB0RUNNING)) {
urb = &u->durb[0].urb;
@@ -2768,6 +2776,14 @@
init_waitqueue_head(&as->usbin.dma.wait);
init_waitqueue_head(&as->usbout.dma.wait);
spin_lock_init(&as->lock);
+ spin_lock_init(&as->usbin.durb[0].urb.lock);
+ spin_lock_init(&as->usbin.durb[1].urb.lock);
+ spin_lock_init(&as->usbin.surb[0].urb.lock);
+ spin_lock_init(&as->usbin.surb[1].urb.lock);
+ spin_lock_init(&as->usbout.durb[0].urb.lock);
+ spin_lock_init(&as->usbout.durb[1].urb.lock);
+ spin_lock_init(&as->usbout.surb[0].urb.lock);
+ spin_lock_init(&as->usbout.surb[1].urb.lock);
as->state = s;
as->usbin.interface = asifin;
as->usbout.interface = asifout;
--
dwmw2
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