linux

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Sebastian Ott 181d95229b [S390] dasd: fix refcounting in dasd_change_state

To set a dasd online dasd_change_state is called twice. The first
cycle will schedule initial analysis of the device, set the rc to
-EAGAIN and will not touch the device state any more.
The initial analysis will in turn call dasd_change_state to increase
the state to the final DASD_STATE_ONLINE.

If the dasd_change_state on the second thread outruns the other one
both finish with the state set to DASD_STATE_ONLINE and the device
refcount will be decreased by 2.

Fix this by leaving dasd_change_state on rc == -EAGAIN so that the
refcount will always be decreased by 1.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

2009-06-22 12:08:23 +02:00

dasd_3990_erp.c

[S390] dasd: message cleanup

2009-03-26 15:24:05 +01:00

dasd_alias.c

[S390] dasd: message cleanup

2009-03-26 15:24:05 +01:00

dasd_devmap.c

[S390] pm: dasd power management callbacks.

2009-06-16 10:31:10 +02:00

dasd_diag.c

[S390] dasd: forward internal errors to dasd_sleep_on caller