xen: make use of xenbus_read_unsigned() in xen-scsifront

Use xenbus_read_unsigned() instead of xenbus_scanf() when possible.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: David Vrabel <david.vrabel@citrix.com>
OraBug: 25497392

(cherry picked from commit 1080b38db49f7e3075aa9cd5a87f1587282cc0b0)
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c
index 9dc8687bf0480e53b2d89431ece47f8504fd5779..7e817c64f385135dd8c0a51e08fecbf2ecd3cace 100644 (file)
--- a/drivers/scsi/xen-scsifront.c
+++ b/drivers/scsi/xen-scsifront.c
@@ -1060,13 +1060,9 @@ static void scsifront_read_backend_params(struct xenbus_device *dev,
                                          struct vscsifrnt_info *info)
 {
        unsigned int sg_grant, nr_segs;
-       int ret;
        struct Scsi_Host *host = info->host;
 
-       ret = xenbus_scanf(XBT_NIL, dev->otherend, "feature-sg-grant", "%u",
-                          &sg_grant);
-       if (ret != 1)
-               sg_grant = 0;
+       sg_grant = xenbus_read_unsigned(dev->otherend, "feature-sg-grant", 0);
        nr_segs = min_t(unsigned int, sg_grant, SG_ALL);
        nr_segs = max_t(unsigned int, nr_segs, VSCSIIF_SG_TABLESIZE);
        nr_segs = min_t(unsigned int, nr_segs,