Imported linux-2.6.27.39 suse/xen patches.

[ipfire-2.x.git] / src / patches / suse-2.6.27.39 / patches.arch / s390-15-11-cio-vary-unregister.patch

From: Gerald Schaefer <geraldsc@de.ibm.com>
Subject: cio: ccw devices are not removed when last path is varied offline
References: bnc#518291,LTC#54951

Symptom:     When the last CHPID to an offline CCW device is varied offline,
             that device remains registered even though it is no longer
             accessible.
Problem:     The vary command triggers an internal path verification event
             which is not handled for devices in the offline state.
Solution:    Install a handler for the path verification event in offline state
             which will remove the device if it is no longer accessible.

Acked-by: John Jolly <jjolly@suse.de>
---
 drivers/s390/cio/device_fsm.c |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

Index: linux-sles11/drivers/s390/cio/device_fsm.c
===================================================================
--- linux-sles11.orig/drivers/s390/cio/device_fsm.c
+++ linux-sles11/drivers/s390/cio/device_fsm.c
@@ -739,6 +739,17 @@ static void ccw_device_generic_notoper(s
 }
 
 /*
+ * Handle path verification event in offline state.
+ */
+static void ccw_device_offline_verify(struct ccw_device *cdev,
+				      enum dev_event dev_event)
+{
+	struct subchannel *sch = to_subchannel(cdev->dev.parent);
+
+	css_schedule_eval(sch->schid);
+}
+
+/*
  * Handle path verification event.
  */
 static void
@@ -1155,7 +1166,7 @@ fsm_func_t *dev_jumptable[NR_DEV_STATES]
 		[DEV_EVENT_NOTOPER]	= ccw_device_generic_notoper,
 		[DEV_EVENT_INTERRUPT]	= ccw_device_offline_irq,
 		[DEV_EVENT_TIMEOUT]	= ccw_device_nop,
-		[DEV_EVENT_VERIFY]	= ccw_device_nop,
+		[DEV_EVENT_VERIFY]	= ccw_device_offline_verify,
 	},
 	[DEV_STATE_VERIFY] = {
 		[DEV_EVENT_NOTOPER]	= ccw_device_generic_notoper,