tree 839fbe93b1b9398a61db63acd89b1e68dbe816de
parent 4ab9dab5b9be0381e714d3fbe518689a72459011
author Fam Zheng <famz@redhat.com> 1397612070 +0800
committer Kevin Wolf <kwolf@redhat.com> 1398160622 +0200

block: Handle error of bdrv_getlength in bdrv_create_dirty_bitmap

bdrv_getlength could fail, check the return value before using it.
Return NULL and set errno if it fails. Callers are updated to handle
the error case.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>