From: Brice Goglin <brice@myri.com>
Date: Fri, 9 May 2008 00:18:45 +0000 (+0200)
Subject: myri10ge: add barrier in myri10ge_send_cmd
X-Git-Tag: firefly_0821_release~20319^2~9^2~25
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=bd2db0cf2411ebc081d45bde1b7c6cf726b832f2;p=firefly-linux-kernel-4.4.55.git

myri10ge: add barrier in myri10ge_send_cmd

Add a barrier() in the usleep() loop in  myri10ge_send_cmd().
Without the barrier, some mips machine never notices that the
firmware has DMA'ed the response.

Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Andrew Gallatin <gallatin@myri.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---

diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index 4a65e4155c0f..48fe624afa53 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -361,8 +361,10 @@ myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
 		for (sleep_total = 0;
 		     sleep_total < 1000
 		     && response->result == htonl(MYRI10GE_NO_RESPONSE_RESULT);
-		     sleep_total += 10)
+		     sleep_total += 10) {
 			udelay(10);
+			mb();
+		}
 	} else {
 		/* use msleep for most command */
 		for (sleep_total = 0;