Frank Munzert b3c21e4919 [S390] tape: disable interrupts in tape_open and tape_release ... Get tape device lock with interrupts disabled. Otherwise lockdep will issue a warning similar to: ================================= [ INFO: inconsistent lock state ] 2.6.27 #1 --------------------------------- inconsistent {in-hardirq-W} -> {hardirq-on-W} usage. vol_id/2903 [HC0[0]:SC0[0]:HE1:SE1] takes: (sch->lock){++..}, at: [<000003e00004c7a2>] tape_open+0x42/0x1a4 [tape] {in-hardirq-W} state was registered at: [<000000000007ce5c>] __lock_acquire+0x894/0xa74 [<000000000007d0ce>] lock_acquire+0x92/0xb8 [<0000000000345154>] _spin_lock+0x5c/0x9c [<0000000000202264>] do_IRQ+0x124/0x1f0 [<0000000000026610>] io_return+0x0/0x8 irq event stamp: 847 hardirqs last enabled at (847): [<000000000007aca6>] trace_hardirqs_on+0x2a/0x38 hardirqs last disabled at (846): [<0000000000076ca2>] trace_hardirqs_off+0x2a/0x38 softirqs last enabled at (0): [<000000000004909e>] copy_process+0x43e/0x11f4 softirqs last disabled at (0): [<0000000000000000>] 0x0 other info that might help us debug this: 1 lock held by vol_id/2903: #0: (&bdev->bd_mutex){--..}, at: [<000000000010e0f4>] do_open+0x78/0x358 stack backtrace: CPU: 1 Not tainted 2.6.27 #1}, Process vol_id (pid: 2903, task: 000000003d4c0000, ksp: 000000003d4e3b10) 0400000000000000 000000003d4e3830 0000000000000002 0000000000000000 000000003d4e38d0 000000003d4e3848 000000003d4e3848 00000000000168a8 0000000000000000 000000003d4e3b10 0000000000000000 0000000000000000 000000003d4e3830 000000000000000c 000000003d4e3830 000000003d4e38a0 000000000034aa98 00000000000168a8 000000003d4e3830 000000003d4e3880 Call Trace: ([<000000000001681c>] show_trace+0x138/0x158) [<0000000000016902>] show_stack+0xc6/0xf8 [<00000000000170d4>] dump_stack+0xb0/0xc0 [<0000000000078810>] print_usage_bug+0x1e8/0x228 [<000000000007a71c>] mark_lock+0xb14/0xd24 [<000000000007cd5a>] __lock_acquire+0x792/0xa74 [<000000000007d0ce>] lock_acquire+0x92/0xb8 [<0000000000345154>] _spin_lock+0x5c/0x9c [<000003e00004c7a2>] tape_open+0x42/0x1a4 [tape] [<000003e00005185c>] tapeblock_open+0x98/0xd0 [tape] Signed-off-by: Frank Munzert <munzert@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>		2008-10-28 11:12:05 +01:00
..
block	[PATCH] sanitize blkdev_get() and friends	2008-10-21 07:49:06 -04:00
char	[S390] tape: disable interrupts in tape_open and tape_release	2008-10-28 11:12:05 +01:00
cio	[S390] qdio: remove incorrect memset	2008-10-28 11:12:03 +01:00
crypto	Merge commit 'linus/master' into merge-linus	2008-10-17 09:20:26 -07:00
kvm	[S390] Use s390_root_dev_* in kvm_virtio.	2008-10-10 21:33:51 +02:00
net	misc: replace __FUNCTION__ with __func__	2008-10-16 11:21:30 -07:00
scsi	blktrace: pass zfcp driver data	2008-10-17 08:46:57 +02:00
ebcdic.c
Makefile	s390: KVM guest: virtio device support, and kvm hypercalls	2008-04-27 12:00:51 +03:00
s390_rdev.c	[S390] bus_id -> dev_set_name() changes	2008-10-10 21:33:50 +02:00
s390mach.c	[S390] stp support.	2008-07-14 10:02:09 +02:00
s390mach.h	[S390] stp support.	2008-07-14 10:02:09 +02:00
sysinfo.c	[S390] Add new fields for System z10 to /proc/sysinfo	2008-04-17 07:47:01 +02:00