From: Frank Blaschka <frank.blaschka@de.ibm.com>
Date: Thu, 12 Jul 2007 10:51:35 +0000 (+0200)
Subject: s390: add barriers to qeth driver
X-Git-Tag: firefly_0821_release~27964^2~15
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=54ab2927d38536f6d437bdd0d7454b99bf67a48c;p=firefly-linux-kernel-4.4.55.git

s390: add barriers to qeth driver

Add barrier to loop where atomic variable is evaluated.

Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index 8dca93598ea3..57f69434fbf9 100644
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -1935,6 +1935,7 @@ qeth_send_control_data(struct qeth_card *card, int len,
 			atomic_inc(&reply->received);
 			wake_up(&reply->wait_q);
 		}
+		cpu_relax();
 	};
 	rc = reply->rc;
 	qeth_put_reply(reply);