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dma: keep a device alive while it has SGLists

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Reviewed-by: Anthony Liguori <aliguori@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-06-03 14:17:19 +02:00
parent cac3c384bb
commit f487b677c2
7 changed files with 25 additions and 12 deletions
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10
hw/scsi/virtio-scsi.c
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@ -77,10 +77,12 @@ static void virtio_scsi_bad_req(void)
exit(1);
}
static void qemu_sgl_init_external(QEMUSGList *qsgl, struct iovec *sg,
static void qemu_sgl_init_external(VirtIOSCSIReq *req, struct iovec *sg,
hwaddr *addr, int num)
{
qemu_sglist_init(qsgl, num, &address_space_memory);
QEMUSGList *qsgl = &req->qsgl;
qemu_sglist_init(qsgl, DEVICE(req->dev), num, &address_space_memory);
while (num--) {
qemu_sglist_add(qsgl, *(addr++), (sg++)->iov_len);
}
@ -99,11 +101,11 @@ static void virtio_scsi_parse_req(VirtIOSCSI *s, VirtQueue *vq,
req->resp.buf = req->elem.in_sg[0].iov_base;
if (req->elem.out_num > 1) {
qemu_sgl_init_external(&req->qsgl, &req->elem.out_sg[1],
qemu_sgl_init_external(req, &req->elem.out_sg[1],
&req->elem.out_addr[1],
req->elem.out_num - 1);
} else {
qemu_sgl_init_external(&req->qsgl, &req->elem.in_sg[1],
qemu_sgl_init_external(req, &req->elem.in_sg[1],
&req->elem.in_addr[1],
req->elem.in_num - 1);
}