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Commit add810a1 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus 

* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  virtio: order used ring after used index read
  virtio-pci: fix per-vq MSI-X request logic
parents 68e71d19 2d61ba95

drivers/virtio/virtio_pci.c

+15 −12
Original line number Diff line number Diff line
@@ -530,13 +530,17 @@ static int vp_try_to_find_vqs(struct virtio_device *vdev, unsigned nvqs, 
			err = PTR_ERR(vqs[i]);

			goto error_find;

		}



		if (!vp_dev->per_vq_vectors || msix_vec == VIRTIO_MSI_NO_VECTOR)

			continue;



		/* allocate per-vq irq if available and necessary */

		if (vp_dev->per_vq_vectors) {

		snprintf(vp_dev->msix_names[msix_vec],

			 sizeof *vp_dev->msix_names,

			 "%s-%s",

			 dev_name(&vp_dev->vdev.dev), names[i]);

			err = request_irq(msix_vec, vring_interrupt, 0,

		err = request_irq(vp_dev->msix_entries[msix_vec].vector,

				  vring_interrupt, 0,

				  vp_dev->msix_names[msix_vec],

				  vqs[i]);

		if (err) {
@@ -544,7 +548,6 @@ static int vp_try_to_find_vqs(struct virtio_device *vdev, unsigned nvqs, 
			goto error_find;

		}

	}

	}

	return 0;



error_find:

drivers/virtio/virtio_ring.c

+3 −0
Original line number Diff line number Diff line
@@ -285,6 +285,9 @@ static void *vring_get_buf(struct virtqueue *_vq, unsigned int *len) 
		return NULL;

	}



	/* Only get used array entries after they have been exposed by host. */

	rmb();



	i = vq->vring.used->ring[vq->last_used_idx%vq->vring.num].id;

	*len = vq->vring.used->ring[vq->last_used_idx%vq->vring.num].len;