2.1.95, pre-2.1.96-1 disk hangs, patch

Keith Owens (kaos@ocs.com.au)
Mon, 13 Apr 1998 23:57:43 +1000

"mount /dir/file -r -t iso9660 -o /loop /mnt" hangs 2.1.95 and
pre-2.1.96-1 every time. Patch follows, this might help other users
having 2.1.95 hangs. The bug is not just restricted to loopback, but
loopback is much more sensitive.

Index: linux/drivers/block/ll_rw_blk.c
--- linux/drivers/block/ll_rw_blk.c.orig Sat, 11 Apr 1998 14:58:05 +1000 keith (linux-2.1/x/23_ll_rw_blk. 1.2.1.12 644) 95.10
+++ linux/drivers/block/ll_rw_blk.c Mon, 13 Apr 1998 23:52:14 +1000 keith (linux-2.1/x/23_ll_rw_blk. 1.2.1.12 644) 95.10(w)
@@ -352,9 +352,9 @@
* request_fn() is usually a quite complex and slow function,
* we want to call it with no spinlocks held
*/
+ spin_unlock_irqrestore(&io_request_lock,flags);
if (queue_new_request)
(dev->request_fn)();
- spin_unlock_irqrestore(&io_request_lock,flags);
}

/*

-
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