diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-01-31 11:28:57 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-02-04 19:53:02 +0200 |
| commit | 6aa46d8ff1ee7e9ca0c4a54d75c74108bee22124 (patch) | |
| tree | 3b5a48e56168ec63101993e6af19ebeb1abea188 /hw/scsi | |
| parent | 0734fb083cb0a91d17d355acdea16a3413b69b0c (diff) | |
| download | qemu-6aa46d8ff1ee7e9ca0c4a54d75c74108bee22124.tar.gz | |
virtio: move VirtQueueElement at the beginning of the structs
The next patch will make virtqueue_pop/vring_pop allocate memory for
the VirtQueueElement. In some cases (blk, scsi, gpu) the device wants
to extend VirtQueueElement with device-specific fields and, until now,
the place of the VirtQueueElement within the containing struct didn't
matter. When allocating the entire block in virtqueue_pop/vring_pop,
however, the containing struct must basically be a "subclass" of
VirtQueueElement, with the VirtQueueElement as the first field. Make
that the case for blk and scsi; gpu is already doing it.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'hw/scsi')
| -rw-r--r-- | hw/scsi/virtio-scsi.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c index 1500c42728..7fdf6ade98 100644 --- a/hw/scsi/virtio-scsi.c +++ b/hw/scsi/virtio-scsi.c @@ -45,8 +45,7 @@ VirtIOSCSIReq *virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq) { VirtIOSCSIReq *req; VirtIOSCSICommon *vs = (VirtIOSCSICommon *)s; - const size_t zero_skip = offsetof(VirtIOSCSIReq, elem) - + sizeof(VirtQueueElement); + const size_t zero_skip = offsetof(VirtIOSCSIReq, vring); req = g_malloc(sizeof(*req) + vs->cdb_size); req->vq = vq; |