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authorPeter Oberparleiter <peter.oberparleiter@de.ibm.com>2008-08-21 19:46:39 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-08-21 19:46:41 +0200
commit91c36919a456589f4f073671474a1f899e0d3c2b (patch)
tree63cb2ee1afd9b00bf2ea4959482d58f402bb21f3 /drivers/s390/cio/css.c
parent49fd38bdaa96f093fcad3176a781a4d0de8f8602 (diff)
[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.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 46c021d880d..51489eff6b0 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);
}