Re: [Qemu-devel] [PATCH 1.3 1/2] qom: dynamic_cast of NULL is always NULL

[Paolo Bonzini]

Il 23/11/2012 17:30, Andreas Färber ha scritto:
> If having SCSI_BUS() return NULL was your intent you would not have
> needed to switch to object_dynamic_cast in your second patch. :)

In the second patch I needed object_dynamic_cast in case the bus was not
a SCSI bus at all.

For example:

$ qemu-system-x86_64 -S -monitor stdio -device piix3-usb-uhci
(qemu) drive_add 4 if=scsi
Object 0x7f2dcdcfe380 is not an instance of type SCSI
Aborted

Paolo