[PATCH linux-next] drivers/xen/xenbus/xenbus_client.c: fix bugon.cocci warnings

[CGEL]

From: Jing Yangyang <jing.yangy...@zte.com.cn>

Use BUG_ON instead of a if condition followed by BUG.

Generated by: scripts/coccinelle/misc/bugon.cocci

Reported-by: Zeal Robot <zea...@zte.com.cn>
Signed-off-by: Jing Yangyang <jing.yangy...@zte.com.cn>
---
 drivers/xen/xenbus/xenbus_client.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/xen/xenbus/xenbus_client.c 
b/drivers/xen/xenbus/xenbus_client.c
index 0cd7289..e8bed1c 100644
--- a/drivers/xen/xenbus/xenbus_client.c
+++ b/drivers/xen/xenbus/xenbus_client.c
@@ -542,8 +542,7 @@ static int __xenbus_map_ring(struct xenbus_device *dev,
                }
        }
 
-       if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, info->unmap, j))
-               BUG();
+       BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, info->unmap, 
j));
 
        *leaked = false;
        for (i = 0; i < j; i++) {
@@ -581,8 +580,7 @@ static int xenbus_unmap_ring(struct xenbus_device *dev, 
grant_handle_t *handles,
                gnttab_set_unmap_op(&unmap[i], vaddrs[i],
                                    GNTMAP_host_map, handles[i]);
 
-       if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, unmap, i))
-               BUG();
+       BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, unmap, i));
 
        err = GNTST_okay;
        for (i = 0; i < nr_handles; i++) {
@@ -778,8 +776,7 @@ static int xenbus_unmap_ring_pv(struct xenbus_device *dev, 
void *vaddr)
                unmap[i].handle = node->handles[i];
        }
 
-       if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, unmap, i))
-               BUG();
+       BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, unmap, i));
 
        err = GNTST_okay;
        leaked = false;
-- 
1.8.3.1