xen-blkfront: fix data size for xenbus_gather in blkfront_connect

barrier variable is int, not long. This overflow caused another variable
override: "err" (in PV code) and "binfo" (in xenlinux code -
drivers/xen/blkfront/blkfront.c). The later caused incorrect device
flags (RO/removable etc).

Signed-off-by: Marek Marczykowski <marmarek@mimuw.edu.pl>
Acked-by: Ian Campbell <Ian.Campbell@citrix.com>
[v1: Changed title]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 9cb8668ff5f412908e99dadcafd6d025904a2cdc..20759817ad57921a86f80eef40b74e4f5f978f65 100644 (file)
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1141,7 +1141,7 @@ static void blkfront_connect(struct blkfront_info *info)
        }
 
        err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
-                           "feature-barrier", "%lu", &barrier,
+                           "feature-barrier", "%d", &barrier,
                            NULL);
 
        /*