[Xen-devel][PATCH]ioemu:fix up error when using qemu-img-xen to create img

["Zhang, Yang" <yang.zhang@xxxxxxxxx>]

If find_protocol() can not find the the drv. The caller should give
a default value.

Signed-off-by: Yang Zhang <yang.zhang@xxxxxxxxx>

diff --git a/block.c b/block.c
index 8a0e8b2..3e84707 100644
--- a/block.c
+++ b/block.c
@@ -306,6 +306,8 @@ static BlockDriver *find_image_format(const char *filename)
     /* no need to test disk image format if the filename told us */
     if (drv != NULL)
         return drv;
+    else 
+        drv = &bdrv_raw;
 
     ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY);
     if (ret < 0)

Attachment: fix_qemu-img-xen_can_not_create_img.patch
Description: fix_qemu-img-xen_can_not_create_img.patch

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