diff options
Diffstat (limited to 'drivers/s390')
| -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 030083f9c6f..c0cb7254725 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; } |