diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2007-02-05 23:17:16 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-02-05 23:17:16 +0300 |
| commit | c59d744bd8a0e283daf6726881e4c9aa4bd25261 (patch) | |
| tree | 89c5b76c34555ad0883512d26aef21c11d7868f9 /drivers/s390/char/sclp.c | |
| parent | 444f0e5489e7ac4bca5c4748d7d846c352a5cd03 (diff) | |
| download | linux-c59d744bd8a0e283daf6726881e4c9aa4bd25261.tar.xz | |
[S390] sclp: don't call local_bh_disable/_local_bh_enable if in_interrupt()
local_bh_disable/_local_bh_enable must not be called if in_irq() is
true. Besides that if in_interrupt() is true bottom halves are
disabled anyway.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char/sclp.c')
| -rw-r--r-- | drivers/s390/char/sclp.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/s390/char/sclp.c b/drivers/s390/char/sclp.c index 3457a9a31571..027cdc18df31 100644 --- a/drivers/s390/char/sclp.c +++ b/drivers/s390/char/sclp.c @@ -402,6 +402,7 @@ sclp_sync_wait(void) unsigned long flags; unsigned long cr0, cr0_sync; u64 timeout; + int irq_context; /* We'll be disabling timer interrupts, so we need a custom timeout * mechanism */ @@ -414,7 +415,9 @@ sclp_sync_wait(void) } local_irq_save(flags); /* Prevent bottom half from executing once we force interrupts open */ - local_bh_disable(); + irq_context = in_interrupt(); + if (!irq_context) + local_bh_disable(); /* Enable service-signal interruption, disable timer interrupts */ trace_hardirqs_on(); __ctl_store(cr0, 0, 0); @@ -435,7 +438,8 @@ sclp_sync_wait(void) } local_irq_disable(); __ctl_load(cr0, 0, 0); - _local_bh_enable(); + if (!irq_context) + _local_bh_enable(); local_irq_restore(flags); } |