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| author | Peter Oberparleiter <peter.oberparleiter@de.ibm.com> | 2008-08-21 19:46:39 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-08-21 19:46:41 +0200 |
| commit | 91c36919a456589f4f073671474a1f899e0d3c2b (patch) | |
| tree | 63cb2ee1afd9b00bf2ea4959482d58f402bb21f3 /drivers/s390/cio/css.c | |
| parent | [S390] dasd: fix data size for PSF/PRSSD command (diff) | |
| download | linux-91c36919a456589f4f073671474a1f899e0d3c2b.tar.xz linux-91c36919a456589f4f073671474a1f899e0d3c2b.zip | |
[S390] cio: call ccw driver notify function with lock held
Calling a ccw driver's notify function without the ccw device lock
held opens up a race window between discovery and handling of a change
in the device operational state. As a result, the device driver may
encounter unexpected device malfunction, leading to out-of-retry
situations or similar.
Remove race by extending the ccw device lock from state change
discovery to the calling of the notify function.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/css.c')
| -rw-r--r-- | drivers/s390/cio/css.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index 46c021d880dc..51489eff6b0b 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -477,7 +477,6 @@ void css_schedule_eval_all(void) void css_wait_for_slow_path(void) { - flush_workqueue(ccw_device_notify_work); flush_workqueue(slow_path_wq); } |