diff options
Diffstat (limited to 'drivers')
| -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); } |