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3f2c31d903
linux/drivers/s390/char
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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
..
con3215.c [S390] 3215: Remove tasklet. 2008-10-10 21:34:02 +02:00
con3270.c [S390] console flush on panic / reboot 2008-10-10 21:34:01 +02:00
ctrlchar.c [S390] workqueue fixes. 2006-12-08 15:53:52 +01:00
ctrlchar.h
defkeymap.c Build fix for drivers/s390/char/defkeymap.c 2008-03-04 08:01:26 -08:00
defkeymap.map
fs3270.c fs3270: Correct error returns 2008-10-13 09:51:44 -07:00
Kconfig [S390] sclp: kill unused SCLP config option. 2007-07-27 12:29:18 +02:00
keyboard.c unicode diacritics support 2007-10-17 08:42:52 -07:00
keyboard.h unicode diacritics support 2007-10-17 08:42:52 -07:00
Makefile [S390] sclp: convert channel path configure code to use sync interface. 2008-01-26 14:11:10 +01:00
monreader.c Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6 2008-07-14 14:48:31 -07:00
monwriter.c monwriter: BKL pushdown 2008-07-02 15:06:23 -06:00
raw3270.c device create: s390: convert device_create_drvdata to device_create 2008-10-16 09:24:44 -07:00
raw3270.h
sclp_cmd.c [S390] Add support for memory hot-remove. 2008-08-01 16:39:33 +02:00
sclp_con.c [S390] console flush on panic / reboot 2008-10-10 21:34:01 +02:00
sclp_config.c [S390] dont use kthread for smp_rescan_cpus(). 2008-08-01 16:39:36 +02:00
sclp_cpi_sys.c [S390] Cleanup sclp printk messages. 2008-07-14 10:02:19 +02:00
sclp_cpi_sys.h [S390] sclp: sysfs interface for SCLP cpi 2008-01-26 14:11:08 +01:00
sclp_cpi.c [S390] sclp: sysfs interface for SCLP cpi 2008-01-26 14:11:08 +01:00
sclp_quiesce.c [S390] Cleanup sclp printk messages. 2008-07-14 10:02:19 +02:00
sclp_rw.c [S390] Cleanup sclp printk messages. 2008-07-14 10:02:19 +02:00
sclp_rw.h
sclp_sdias.c [S390] Cleanup sclp printk messages. 2008-07-14 10:02:19 +02:00
sclp_tty.c [S390] sclp_tty: Fix scheduling while atomic bug. 2008-07-14 10:02:25 +02:00
sclp_tty.h [S390] sclp_tty: remove ioctl interface. 2008-07-14 10:02:25 +02:00
sclp_vt220.c [S390] console flush on panic / reboot 2008-10-10 21:34:01 +02:00
sclp.c [S390] nohz/sclp: disable timer on synchronous waits. 2008-08-01 16:39:30 +02:00
sclp.h [S390] sclp: clean up send/receive naming scheme 2008-02-19 15:29:34 +01:00
tape_34xx.c [S390] cio: introduce fcx enabled scsw format 2008-07-14 10:02:07 +02:00
tape_3590.c [S390] bus_id -> dev_name conversions 2008-10-10 21:33:49 +02:00
tape_3590.h [S390] tape: New read configuration data. 2007-05-04 18:48:26 +02:00
tape_block.c [S390] tape block: complete request with correct locking 2008-10-28 11:12:04 +01:00
tape_char.c [S390] drivers/s390: Use an IS_ERR test rather than a NULL test 2008-08-21 19:46:39 +02:00
tape_class.c device create: s390: convert device_create_drvdata to device_create 2008-10-16 09:24:44 -07:00
tape_class.h [S390] tape: duplicate sysfs filename when setting tape device online 2008-04-17 07:46:59 +02:00
tape_core.c [S390] tape: disable interrupts in tape_open and tape_release 2008-10-28 11:12:05 +01:00
tape_proc.c [S390] bus_id -> dev_name conversions 2008-10-10 21:33:49 +02:00
tape_std.c [S390] bus_id -> dev_name conversions 2008-10-10 21:33:49 +02:00
tape_std.h
tape.h [S390] tape: fix race with stack local wait_queue_head_t. 2008-05-30 10:03:36 +02:00
tty3270.c [S390] Cleanup 3270 printk messages. 2008-07-14 10:02:18 +02:00
tty3270.h [S390] Get rid of a bunch of sparse warnings again. 2007-10-12 16:13:06 +02:00
vmcp.c Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6 2008-07-14 14:48:31 -07:00
vmcp.h [S390] vmcp cleanup 2007-07-17 13:36:19 +02:00
vmlogrdr.c device create: s390: convert device_create_drvdata to device_create 2008-10-16 09:24:44 -07:00
vmur.c device create: s390: convert device_create_drvdata to device_create 2008-10-16 09:24:44 -07:00
vmur.h [S390] vmur: Use wait queue instead of mutex to serialize open 2008-04-17 07:46:59 +02:00
vmwatchdog.c Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6 2008-07-14 14:48:31 -07:00
zcore.c [S390] zfcpdump: Make SCSI disk dump tool recognize storage holes 2008-07-17 17:22:07 +02:00