[PATCH v6 2/3] ioreq: Indent ioreq_server_alloc_mfn() body one level deeper

["Julian Vetter" <julian.vetter@vates.tech>]

No functional change. It adds a wrapping block to prepare for the loop
that the subsequent patch introduces to handle multiple ioreq pages.

Signed-off-by: Julian Vetter <julian.vetter@vates.tech>
---
Changes in v6:
- Dropped the indentation change for ioreq_server_free_mfn, because the
  modifications in the next patch don't really merit the change anymore
---
 xen/common/ioreq.c | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/xen/common/ioreq.c b/xen/common/ioreq.c
index d8d02167b4..bae9b99c99 100644
--- a/xen/common/ioreq.c
+++ b/xen/common/ioreq.c
@@ -277,22 +277,24 @@ static int ioreq_server_alloc_mfn(struct ioreq_server *s, bool buf)
         return 0;
     }
 
-    page = alloc_domheap_page(s->target, MEMF_no_refcount);
+    {
+        page = alloc_domheap_page(s->target, MEMF_no_refcount);
 
-    if ( !page )
-        return -ENOMEM;
+        if ( !page )
+            return -ENOMEM;
 
-    if ( !get_page_and_type(page, s->target, PGT_writable_page) )
-    {
-        /*
-         * The domain can't possibly know about this page yet, so failure
-         * here is a clear indication of something fishy going on.
-         */
-        domain_crash(s->emulator);
-        return -ENODATA;
-    }
+        if ( !get_page_and_type(page, s->target, PGT_writable_page) )
+        {
+            /*
+             * The domain can't possibly know about this page yet, so failure
+             * here is a clear indication of something fishy going on.
+             */
+            domain_crash(s->emulator);
+            return -ENODATA;
+        }
 
-    mfn = page_to_mfn(page);
+        mfn = page_to_mfn(page);
+    }
     iorp->va = vmap(&mfn, 1);
     if ( !iorp->va )
         goto fail;
-- 
2.53.0



--
Julian Vetter | Vates Hypervisor & Kernel Developer

XCP-ng & Xen Orchestra - Vates solutions

web: https://vates.tech