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-rw-r--r--drivers/s390/cio/cio.c8
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;
}