diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-10-10 23:33:17 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-10-10 23:33:55 +0400 |
| commit | b1e766137fe2462fd110e2930f74ef5636adb436 (patch) | |
| tree | 197c28473c402877597821ddc3736a51a34f8ebf /drivers/s390/cio | |
| parent | b2bbb642ac2829006a81ae164e2f06ebc22f81dd (diff) | |
| download | linux-b1e766137fe2462fd110e2930f74ef5636adb436.tar.xz | |
[S390] cio: fix cio_tpi.
In cio_tpi only disable bottom halves when not in interrupt context.
Otherwise a WARN_ON gets triggered. Besides that, when we are in
interrupt context bottom halves are disabled anyway.
Fixes this one:
Badness at kernel/softirq.c:77
Modules linked in:
CPU: 2 Not tainted 2.6.26 #4
Process swapper (pid: 0, task: 000000003fe83db0, ksp: 000000003fea7d28)
Krnl PSW : 0404c00180000000 0000000000053f4e (__local_bh_disable+0xbe/0xcc)
R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 EA:3
Krnl GPRS: 0000000000008ee0 00000000005f95e0 0000000000000000 0000000000000001
000000000020be92 0000000000000000 0000000000000210 00000000005d36c0
000000003fb5f4d8 0000000000000000 000000000020bed0 000000003fb5f3c8
00000000009be920 0000000000364898 000000003fb5f408 000000003fb5f3c8
Krnl Code: 0000000000053f42: bf2f1000 icm %r2,15,0(%r1)
0000000000053f46: a774ffc5 brc 7,53ed0
0000000000053f4a: a7f40001 brc 15,53f4c
>0000000000053f4e: a7280001 lhi %r2,1
0000000000053f52: 50201000 st %r2,0(%r1)
0000000000053f56: a7f4ffbd brc 15,53ed0
0000000000053f5a: 0707 bcr 0,%r7
0000000000053f5c: a7f13fc0 tmll %r15,16320
Call Trace:
([<0000000000000210>] 0x210)
[<0000000000053f86>] local_bh_disable+0x2a/0x38
[<000000000020bed0>] wait_cons_dev+0xd4/0x154
[<0000000000247cb2>] raw3215_make_room+0x6a/0x1a8
[<000000000024861a>] raw3215_write+0x86/0x28c
[<00000000002488a0>] con3215_write+0x80/0x110
[<000000000004c3e0>] __call_console_drivers+0xc8/0xe4
[<000000000004c47e>] _call_console_drivers+0x82/0xc4
[<000000000004c744>] release_console_sem+0x218/0x2c0
[<000000000004cf64>] vprintk+0x3c0/0x504
[<0000000000354a4a>] printk+0x52/0x64
[<0000000000088004>] __print_symbol+0x40/0x50
[<0000000000071dbc>] print_stack_trace+0x78/0xac
[<0000000000079e78>] print_lock_dependencies+0x148/0x208
[<000000000007a050>] print_irq_inversion_bug+0x118/0x15c
[<000000000007a106>] check_usage_forwards+0x72/0x84
[<000000000007a36e>] mark_lock+0x1d2/0x594
[<000000000007baca>] __lock_acquire+0x886/0xf48
[<000000000007c234>] lock_acquire+0xa8/0xe0
[<0000000000350316>] _write_lock+0x56/0x98
[<000000000026cd92>] zfcp_erp_adapter_reopen+0x4e/0x8c
[<000000000026f1e8>] zfcp_qdio_int_resp+0x2e4/0x2f4
[<00000000002210f4>] qdio_int_handler+0x274/0x888
[<00000000002177b6>] ccw_device_call_handler+0x6e/0xd8
[<0000000000215336>] ccw_device_irq+0xd6/0x160
[<0000000000212f88>] io_subchannel_irq+0x8c/0x118
[<000000000020c120>] do_IRQ+0x1d0/0x1fc
[<00000000000270b2>] io_return+0x0/0x8
[<000000000001c8a4>] cpu_idle+0x178/0x21c
([<000000000001c884>] cpu_idle+0x158/0x21c)
[<00000000003483a2>] start_secondary+0xb6/0xc8
INFO: lockdep is turned off.
Last Breaking-Event-Address:
[<0000000000053f4a>] __local_bh_disable+0xba/0xcc
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio')
| -rw-r--r-- | drivers/s390/cio/cio.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index 030083f9c6f3..c0cb72547256 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -114,6 +114,7 @@ cio_tpi(void) struct tpi_info *tpi_info; struct subchannel *sch; struct irb *irb; + int irq_context; tpi_info = (struct tpi_info *) __LC_SUBCHANNEL_ID; if (tpi (NULL) != 1) @@ -126,7 +127,9 @@ cio_tpi(void) sch = (struct subchannel *)(unsigned long)tpi_info->intparm; if (!sch) return 1; - local_bh_disable(); + irq_context = in_interrupt(); + if (!irq_context) + local_bh_disable(); irq_enter (); spin_lock(sch->lock); memcpy(&sch->schib.scsw, &irb->scsw, sizeof(union scsw)); @@ -134,7 +137,8 @@ cio_tpi(void) sch->driver->irq(sch); spin_unlock(sch->lock); irq_exit (); - _local_bh_enable(); + if (!irq_context) + _local_bh_enable(); return 1; } |