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authorJan Glauber <jang@linux.vnet.ibm.com>2010-02-09 09:46:08 +0100
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-02-09 09:46:23 +0100
commit959153d34544b7237bad263e73a5abdf94fc7722 (patch)
treeee34df4e1bfa34024a96e822633a2b22a6091269 /drivers
parent4c52228d1b83ef67d4fa381c2ade70122c9e3c34 (diff)
downloadlinux-linaro-stable-959153d34544b7237bad263e73a5abdf94fc7722.tar.gz
[S390] qdio: prevent call trace if CHPID is offline
If a CHPID is offline during a device shutdown the ccw_device_halt|clear may fail and the qdio device stays in state STOPPED until the shutdown is finished. If an interrupt occurs before the device is set to INACTIVE the STOPPED state triggers a WARN_ON in the interrupt handler. Prevent this WARN_ON by catching the STOPPED state in the interrupt handler. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/s390/cio/qdio_main.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 5781c5d10cff..62b654af9237 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -960,6 +960,8 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
qdio_handle_activate_check(cdev, intparm, cstat,
dstat);
break;
+ case QDIO_IRQ_STATE_STOPPED:
+ break;
default:
WARN_ON(1);
}