qdev: fix get_fw_dev_path to support to add nothing to fw_dev_path
commitbbfa18fca4e44ff9c23d36b50d8a998af9c9e9fc
authorAmos Kong <akong@redhat.com>
Wed, 29 May 2013 07:56:42 +0000 (29 15:56 +0800)
committerAnthony Liguori <aliguori@us.ibm.com>
Thu, 30 May 2013 16:44:27 +0000 (30 11:44 -0500)
tree4e62cccef22676eb2ea78704aa54398d9144672f
parent87d23f78aa79b72da022afda358bbc8a8509ca70
qdev: fix get_fw_dev_path to support to add nothing to fw_dev_path

Recent virtio refactoring in QEMU made virtio-bus become the parent bus
of scsi-bus, and virtio-bus doesn't have get_fw_dev_path implementation,
typename will be added to fw_dev_path by default, the new fw_dev_path
could not be identified by seabios. It causes that bootindex parameter
of scsi device doesn't work.

This patch implements get_fw_dev_path() in BusClass, it will be called
if bus doesn't implement the method, tyename will be added to
fw_dev_path. If the implemented method returns NULL, nothing will be
added to fw_dev_path.

It also implements virtio_bus_get_fw_dev_path() to return NULL. Then
QEMU will still pass original style of fw_dev_path to seabios.

Signed-off-by: Amos Kong <akong@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-id: 1369814202-10346-1-git-send-email-akong@redhat.com
--
v2: only add nothing to fw_dev_path when get_fw_dev_path() is
    implemented and returns NULL. then it will not effect other devices
    don't have get_fw_dev_path() implementation.
v3: implement default get_fw_dev_path() in BusClass
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
hw/core/qdev.c
hw/virtio/virtio-bus.c