tree 6073dddbe1725118e8f92364de7b3d632bd2eb0e
parent 807105a775323be9b45ef1e965c5aad85a5ec281
author Markus Armbruster <armbru@redhat.com> 1295289089 +0100
committer Kevin Wolf <kwolf@redhat.com> 1295884190 +0100

blockdev: Fix drive_del not to crash when drive is not in use

Watch this:

    (qemu) drive_add 0 if=none,file=tmp.img
    OK
    (qemu) info block
    none0: type=hd removable=0 file=tmp.img ro=0 drv=raw encrypted=0
    (qemu) drive_del none0
    Segmentation fault (core dumped)

do_drive_del()'s code to clean up the pointer from a qdev using the
drive back to the drive needs to check whether such a device exists.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>