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authorSebastian Ott <sebott@linux.vnet.ibm.com>2010-11-10 10:05:53 +0100
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-11-10 10:05:54 +0100
commit16d2ce271c6b8b3527ed1461d03b5f373d53f78f (patch)
tree9e2fbffaf696bfa681a822ac27061bee35476fd7 /drivers/s390
parent3b210e7652a0ac638b1a267b6a181c8f742d8462 (diff)
[S390] cio: fix incorrect ccw_device_init_count
If device recognition is interrupted by a subchannel event indicating that the device is gone, ccw_device_init_count is not correctly decreased. Fix this by reporting the corresponding event to the device recognition callback via the state machine. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/cio/device.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 2ff8a22d4257..e8391b89eff4 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -1455,7 +1455,16 @@ static int io_subchannel_sch_event(struct subchannel *sch, int process)
break;
case IO_SCH_UNREG_ATTACH:
case IO_SCH_UNREG:
- if (cdev)
+ if (!cdev)
+ break;
+ if (cdev->private->state == DEV_STATE_SENSE_ID) {
+ /*
+ * Note: delayed work triggered by this event
+ * and repeated calls to sch_event are synchronized
+ * by the above check for work_pending(cdev).
+ */
+ dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
+ } else
ccw_device_set_notoper(cdev);
break;
case IO_SCH_NOP: