tree d00fc8b65ab1c136ce04b2014591ee084bd2de25
parent 8e36d6ca34243fdc9f48f4bdbe5fca2b19162bfa
author Kevin Wolf <kwolf@redhat.com> 1366645720 +0200
committer Anthony Liguori <aliguori@us.ibm.com> 1366648301 -0500

block: Fix build with tracing enabled

filename was still uninitialised when it's used as a parameter to a
tracing function, so let's move the initialisation. Also, commit c2ad1b0c
forgot to add a NULL check, which this patch adds while we're at it.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Tested-by: Andreas Färber <afaerber@suse.de>
Message-id: 1366645720-11384-1-git-send-email-kwolf@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>