linux-kernel - [PATCH 09/16] hv: hv_util: move vmbus

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Message-Id: <1423016804-22014-9-git-send-email-kys@microsoft.com>
Date:	Tue,  3 Feb 2015 18:26:37 -0800
From:	"K. Y. Srinivasan" <kys@...rosoft.com>
To:	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	devel@...uxdriverproject.org, olaf@...fle.de, apw@...onical.com,
	vkuznets@...hat.com
Cc:	Dexuan Cui <"[mailto:decui@...rosoft.com]"@linuxonhyperv.com>,
	"K. Y. Srinivasan" <kys@...rosoft.com>,
	Dexuan Cui <decui@...rosoft.com>
Subject: [PATCH 09/16] hv: hv_util: move vmbus_open() to a later place

From: Dexuan Cui <[mailto:decui@...rosoft.com]>

Before the line vmbus_open() returns, srv->util_cb can be already running
and the variables, like util_fw_version, are needed by the srv->util_cb.

So we have to make sure the variables are initialized before the vmbus_open().

CC: "K. Y. Srinivasan" <kys@...rosoft.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@...hat.com>
Reviewed-by: Jason Wang <jasowang@...hat.com>
Signed-off-by: Dexuan Cui <decui@...rosoft.com>
Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
---
 drivers/hv/hv_util.c |   11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
index 3b9c9ef..c5be773 100644
--- a/drivers/hv/hv_util.c
+++ b/drivers/hv/hv_util.c
@@ -340,12 +340,8 @@ static int util_probe(struct hv_device *dev,
 
 	set_channel_read_state(dev->channel, false);
 
-	ret = vmbus_open(dev->channel, 4 * PAGE_SIZE, 4 * PAGE_SIZE, NULL, 0,
-			srv->util_cb, dev->channel);
-	if (ret)
-		goto error;
-
 	hv_set_drvdata(dev, srv);
+
 	/*
 	 * Based on the host; initialize the framework and
 	 * service version numbers we will negotiate.
@@ -365,6 +361,11 @@ static int util_probe(struct hv_device *dev,
 		hb_srv_version = HB_VERSION;
 	}
 
+	ret = vmbus_open(dev->channel, 4 * PAGE_SIZE, 4 * PAGE_SIZE, NULL, 0,
+			srv->util_cb, dev->channel);
+	if (ret)
+		goto error;
+
 	return 0;
 
 error:
-- 
1.7.4.1

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