linux-kernel - [PATCH 3/3] xen-blkfront: free resources if xlvbd_alloc

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Date:	Thu, 28 Jul 2016 17:01:44 +0800
From:	Bob Liu <bob.liu@...cle.com>
To:	linux-kernel@...r.kernel.org
Cc:	xen-devel@...ts.xenproject.org, konrad.wilk@...cle.com,
	roger.pau@...rix.com, Bob Liu <bob.liu@...cle.com>
Subject: [PATCH 3/3] xen-blkfront: free resources if xlvbd_alloc_gendisk fails

Current code forgets to free resources in the failure path of
xlvbd_alloc_gendisk(), this patch fix it.

Signed-off-by: Bob Liu <bob.liu@...cle.com>
---
 drivers/block/xen-blkfront.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index d5ed60b..d8429d4 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -2446,7 +2446,7 @@ static void blkfront_connect(struct blkfront_info *info)
 	if (err) {
 		xenbus_dev_fatal(info->xbdev, err, "xlvbd_add at %s",
 				 info->xbdev->otherend);
-		return;
+		goto fail;
 	}
 
 	xenbus_switch_state(info->xbdev, XenbusStateConnected);
@@ -2459,6 +2459,11 @@ static void blkfront_connect(struct blkfront_info *info)
 	add_disk(info->gd);
 
 	info->is_ready = 1;
+	return;
+
+fail:
+	blkif_free(info, 0);
+	return;
 }
 
 /**
-- 
1.7.10.4