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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/device.h
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/device.h')
-rw-r--r--drivers/s390/cio/device.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/cio/device.h b/drivers/s390/cio/device.h
index 9800a8335a3..6f5c3f2b358 100644
--- a/drivers/s390/cio/device.h
+++ b/drivers/s390/cio/device.h
@@ -72,7 +72,6 @@ dev_fsm_final_state(struct ccw_device *cdev)
}
extern struct workqueue_struct *ccw_device_work;
-extern struct workqueue_struct *ccw_device_notify_work;
extern wait_queue_head_t ccw_device_init_wq;
extern atomic_t ccw_device_init_count;
@@ -120,6 +119,7 @@ int ccw_device_stlck(struct ccw_device *);
void ccw_device_trigger_reprobe(struct ccw_device *);
void ccw_device_kill_io(struct ccw_device *);
int ccw_device_notify(struct ccw_device *, int);
+void ccw_device_set_notoper(struct ccw_device *cdev);
/* qdio needs this. */
void ccw_device_set_timeout(struct ccw_device *, int);