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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2009-06-22 12:08:21 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-06-22 12:08:23 +0200 |
| commit | 181d95229b0931ee2ce6aad7348079cbc10e8d05 (patch) | |
| tree | 9962496049dad3c4ed5695d09886d0804be51462 /tools/perf/perf.h | |
| parent | e98bbaafcd1c47d30f3245517fb585f1aaaca4db (diff) | |
| download | linux-181d95229b0931ee2ce6aad7348079cbc10e8d05.tar.bz2 | |
[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>
Diffstat (limited to 'tools/perf/perf.h')
0 files changed, 0 insertions, 0 deletions