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Message-Id: <1405409656-45117-1-git-send-email-ingo.tuchscherer@de.ibm.com>
Date:	Tue, 15 Jul 2014 09:34:16 +0200
From:	Ingo Tuchscherer <ingo.tuchscherer@...ibm.com>
To:	linux-kernel@...r.kernel.org, "Theodore Ts'o" <tytso@....edu>
Cc:	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Gerald Schaefer <gerald.schaefer@...ibm.com>,
	Heiko Carstens <heicars2@...ux.vnet.ibm.com>,
	Torsten Duwe <duwe@...e.de>,
	Hendrik Brueckner <brueckner@...ibm.com>,
	Matt Mackall <mpm@...enic.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Harald Freudenberger <freude@...ibm.com>,
	Ingo Tuchscherer <ingo.tuchscherer@...ux.vnet.ibm.com>
Subject: 

Subject: 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@...ibm.com>

diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 69ef4f8..4038437 100644
--- 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;

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