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(parent: 24a1872) | patch
[S390] cio: fix quiesce state
authorSebastian Ott <sebott@linux.vnet.ibm.com>
Mon, 7 Dec 2009 11:51:35 +0000 (12:51 +0100)
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>
Mon, 7 Dec 2009 11:51:32 +0000 (12:51 +0100)
commit56e6b796fe9b99287648fc5686aae00106b37bab
treef0c75986905f3ff01ec1c801843f94923509af06tree | snapshot (tar.bz2 tar.gz zip)
parent24a1872d6411c7cce82c0888a4fbea23e993e051commit | diff
[S390] cio: fix quiesce state

DEV_STATE_QUIESCE is used to stop all IO on a busy subchannel.
This patch fixes the following problems related to the QUIESCE
state:

* Fix a potential race condition which could occur when the
resulting state was DEV_STATE_OFFLINE.

* Add missing locking around cio_disable_subchannel,
ccw_device_cancel_halt_clear and the cdev's handler.

* Loop until we know for sure that the subchannel is disabled.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
drivers/s390/cio/device.c diff | blob | blame | history
drivers/s390/cio/device_fsm.c diff | blob | blame | history
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