xen-scsiback: clean up a type issue in scsiback_make_tpg()

This code was confusing because we had an unsigned long and then we
compared it to UINT_MAX and then we stored it in a u16.  How many bytes
is this supposed to have: 2, 4 or 16???

I've made it a u16 throughout.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c
index 7b5656323739..ad11258a78d6 100644
--- a/drivers/xen/xen-scsiback.c
+++ b/drivers/xen/xen-scsiback.c
@@ -1885,13 +1885,14 @@ scsiback_make_tpg(struct se_wwn *wwn,
                         struct scsiback_tport, tport_wwn);
 
         struct scsiback_tpg *tpg;
-        unsigned long tpgt;
+        u16 tpgt;
         int ret;
 
         if (strstr(name, "tpgt_") != name)
                 return ERR_PTR(-EINVAL);
-        if (kstrtoul(name + 5, 10, &tpgt) || tpgt > UINT_MAX)
-                return ERR_PTR(-EINVAL);
+        ret = kstrtou16(name + 5, 10, &tpgt);
+        if (ret)
+                return ERR_PTR(ret);
 
         tpg = kzalloc(sizeof(struct scsiback_tpg), GFP_KERNEL);
         if (!tpg)