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authorRalph Wuerthner <rwuerthn@de.ibm.com>2008-03-05 12:37:13 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-03-05 12:37:19 +0100
commitfaa582ca8014d2e1ede5568a813fb0e5c3c078df (patch)
tree18e4a7a8a877d2d246f01234fbbb61324a36354f
parentfa331ffc56fb8ead0811a89e4a582bbd5f29d714 (diff)
[S390] zcrypt: fix ap_device_list handling
In ap_device_probe() we can add the new ap device to the internal device list only if the device probe function successfully returns. Otherwise we might end up with an invalid device in the internal ap device list. Signed-off-by: Ralph Wuerthner <rwuerthn@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--drivers/s390/crypto/ap_bus.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index d0c6fd3b1c1..7b0b8190129 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -490,10 +490,12 @@ static int ap_device_probe(struct device *dev)
int rc;
ap_dev->drv = ap_drv;
- spin_lock_bh(&ap_device_lock);
- list_add(&ap_dev->list, &ap_device_list);
- spin_unlock_bh(&ap_device_lock);
rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV;
+ if (!rc) {
+ spin_lock_bh(&ap_device_lock);
+ list_add(&ap_dev->list, &ap_device_list);
+ spin_unlock_bh(&ap_device_lock);
+ }
return rc;
}
@@ -532,11 +534,11 @@ static int ap_device_remove(struct device *dev)
ap_flush_queue(ap_dev);
del_timer_sync(&ap_dev->timeout);
- if (ap_drv->remove)
- ap_drv->remove(ap_dev);
spin_lock_bh(&ap_device_lock);
list_del_init(&ap_dev->list);
spin_unlock_bh(&ap_device_lock);
+ if (ap_drv->remove)
+ ap_drv->remove(ap_dev);
spin_lock_bh(&ap_dev->lock);
atomic_sub(ap_dev->queue_count, &ap_poll_requests);
spin_unlock_bh(&ap_dev->lock);