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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2010-11-10 10:05:53 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-11-10 10:05:54 +0100 |
| commit | 16d2ce271c6b8b3527ed1461d03b5f373d53f78f (patch) | |
| tree | 9e2fbffaf696bfa681a822ac27061bee35476fd7 /drivers/s390 | |
| parent | [S390] tape: add medium state notifications (diff) | |
| download | linux-16d2ce271c6b8b3527ed1461d03b5f373d53f78f.tar.xz linux-16d2ce271c6b8b3527ed1461d03b5f373d53f78f.zip | |
[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.c | 11 |
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: |