s390/zcrypt: improve device probing for zcrypt adapter cards

Improve device probing process for zcrypt adapters to
transmit service request during registration process.

Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 69ef4f8cfac8c14366c9803eec4ed6877accf786..4038437ff033f892d30c746056bbb16d12e40c5a 100644 (file)
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -901,10 +901,15 @@ static int ap_device_probe(struct device *dev)
        int rc;
 
        ap_dev->drv = ap_drv;
+
+       spin_lock_bh(&ap_device_list_lock);
+       list_add(&ap_dev->list, &ap_device_list);
+       spin_unlock_bh(&ap_device_list_lock);
+
        rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV;
-       if (!rc) {
+       if (rc) {
                spin_lock_bh(&ap_device_list_lock);
-               list_add(&ap_dev->list, &ap_device_list);
+               list_del_init(&ap_dev->list);
                spin_unlock_bh(&ap_device_list_lock);
        }
        return rc;