Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio fixes from Michael Tsirkin:
 "Fixes two obvious bugs in virtio pci"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio_pci: fix cpu affinity support
  virtio_blk: fix incorrect message when disk is resized

2 files changed, 17 insertions, 9 deletions

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 1498b899a593..d3d5523862c2 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -381,6 +381,7 @@ static void virtblk_config_changed_work(struct work_struct *work)
 	struct request_queue *q = vblk->disk->queue;
 	char cap_str_2[10], cap_str_10[10];
 	char *envp[] = { "RESIZE=1", NULL };
+	unsigned long long nblocks;
 	u64 capacity;
 
 	/* Host must always specify the capacity. */
@@ -393,16 +394,19 @@ static void virtblk_config_changed_work(struct work_struct *work)
 		capacity = (sector_t)-1;
 	}
 
-	string_get_size(capacity, queue_logical_block_size(q),
+	nblocks = DIV_ROUND_UP_ULL(capacity, queue_logical_block_size(q) >> 9);
+
+	string_get_size(nblocks, queue_logical_block_size(q),
 			STRING_UNITS_2, cap_str_2, sizeof(cap_str_2));
-	string_get_size(capacity, queue_logical_block_size(q),
+	string_get_size(nblocks, queue_logical_block_size(q),
 			STRING_UNITS_10, cap_str_10, sizeof(cap_str_10));
 
 	dev_notice(&vdev->dev,
-		  "new size: %llu %d-byte logical blocks (%s/%s)\n",
-		  (unsigned long long)capacity,
-		  queue_logical_block_size(q),
-		  cap_str_10, cap_str_2);
+		   "new size: %llu %d-byte logical blocks (%s/%s)\n",
+		   nblocks,
+		   queue_logical_block_size(q),
+		   cap_str_10,
+		   cap_str_2);
 
 	set_capacity(vblk->disk, capacity);
 	revalidate_disk(vblk->disk);
diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c
index 007a4f366086..1c4797e53f68 100644
--- a/drivers/virtio/virtio_pci_common.c
+++ b/drivers/virtio/virtio_pci_common.c
@@ -107,6 +107,7 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors,
 {
 	struct virtio_pci_device *vp_dev = to_vp_device(vdev);
 	const char *name = dev_name(&vp_dev->vdev.dev);
+	unsigned flags = PCI_IRQ_MSIX;
 	unsigned i, v;
 	int err = -ENOMEM;
 
@@ -126,10 +127,13 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors,
 					GFP_KERNEL))
 			goto error;
 
+	if (desc) {
+		flags |= PCI_IRQ_AFFINITY;
+		desc->pre_vectors++; /* virtio config vector */
+	}
+
 	err = pci_alloc_irq_vectors_affinity(vp_dev->pci_dev, nvectors,
-					     nvectors, PCI_IRQ_MSIX |
-					     (desc ? PCI_IRQ_AFFINITY : 0),
-					     desc);
+					     nvectors, flags, desc);
 	if (err < 0)
 		goto error;
 	vp_dev->msix_enabled = 1;