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path: root/drivers/lguest/lguest_device.c
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Diffstat (limited to 'drivers/lguest/lguest_device.c')
-rw-r--r--drivers/lguest/lguest_device.c36
1 files changed, 34 insertions, 2 deletions
diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c
index 4babed899d59..e082cdac88b4 100644
--- a/drivers/lguest/lguest_device.c
+++ b/drivers/lguest/lguest_device.c
@@ -313,6 +313,38 @@ static void lg_del_vq(struct virtqueue *vq)
313 kfree(lvq); 313 kfree(lvq);
314} 314}
315 315
316static void lg_del_vqs(struct virtio_device *vdev)
317{
318 struct virtqueue *vq, *n;
319
320 list_for_each_entry_safe(vq, n, &vdev->vqs, list)
321 lg_del_vq(vq);
322}
323
324static int lg_find_vqs(struct virtio_device *vdev, unsigned nvqs,
325 struct virtqueue *vqs[],
326 vq_callback_t *callbacks[],
327 const char *names[])
328{
329 struct lguest_device *ldev = to_lgdev(vdev);
330 int i;
331
332 /* We must have this many virtqueues. */
333 if (nvqs > ldev->desc->num_vq)
334 return -ENOENT;
335
336 for (i = 0; i < nvqs; ++i) {
337 vqs[i] = lg_find_vq(vdev, i, callbacks[i], names[i]);
338 if (IS_ERR(vqs[i]))
339 goto error;
340 }
341 return 0;
342
343error:
344 lg_del_vqs(vdev);
345 return PTR_ERR(vqs[i]);
346}
347
316/* The ops structure which hooks everything together. */ 348/* The ops structure which hooks everything together. */
317static struct virtio_config_ops lguest_config_ops = { 349static struct virtio_config_ops lguest_config_ops = {
318 .get_features = lg_get_features, 350 .get_features = lg_get_features,
@@ -322,8 +354,8 @@ static struct virtio_config_ops lguest_config_ops = {
322 .get_status = lg_get_status, 354 .get_status = lg_get_status,
323 .set_status = lg_set_status, 355 .set_status = lg_set_status,
324 .reset = lg_reset, 356 .reset = lg_reset,
325 .find_vq = lg_find_vq, 357 .find_vqs = lg_find_vqs,
326 .del_vq = lg_del_vq, 358 .del_vqs = lg_del_vqs,
327}; 359};
328 360
329/* The root device for the lguest virtio devices. This makes them appear as 361/* The root device for the lguest virtio devices. This makes them appear as