[Qemu-devel] [PATCH v2 3/4] parallels: split check for parallels format in parallels_open

["Denis V. Lunev" <den@openvz.org>]

and rework error path a bit. There is no difference at the moment, but
the code will be definitely shorter when additional processing will
be required for WithouFreSpacExt

Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Jeff Cody <jcody@redhat.com>
CC: Kevin Wolf <kwolf@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
---
 block/parallels.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/block/parallels.c b/block/parallels.c
index 16d14ad..466705e 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -85,11 +85,11 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
         goto fail;
     }
 
-    if (memcmp(ph.magic, HEADER_MAGIC, 16) ||
-        (le32_to_cpu(ph.version) != HEADER_VERSION)) {
-        error_setg(errp, "Image not in Parallels format");
-        ret = -EINVAL;
-        goto fail;
+    if (le32_to_cpu(ph.version) != HEADER_VERSION) {
+        goto fail_format;
+    }
+    if (memcmp(ph.magic, HEADER_MAGIC, 16)) {
+        goto fail_format;
     }
 
     bs->total_sectors = 0xffffffff & le64_to_cpu(ph.nb_sectors);
@@ -120,6 +120,9 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
     qemu_co_mutex_init(&s->lock);
     return 0;
 
+fail_format:
+    error_setg(errp, "Image not in Parallels format");
+    ret = -EINVAL;
 fail:
     g_free(s->catalog_bitmap);
     return ret;
-- 
1.9.1