virtio: Use pci_enable_msix_exact() instead of pci_enable_msix()

As result of deprecation of MSI-X/MSI enablement functions
pci_enable_msix() and pci_enable_msi_block() all drivers
using these two interfaces need to be updated to use the
new pci_enable_msi_range()  or pci_enable_msi_exact()
and pci_enable_msix_range() or pci_enable_msix_exact()
interfaces.

Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c
index a416f9b2a7f6..101db3faf5d4 100644
--- a/drivers/virtio/virtio_pci.c
+++ b/drivers/virtio/virtio_pci.c
@@ -333,10 +333,8 @@ static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors,
         for (i = 0; i < nvectors; ++i)
                 vp_dev->msix_entries[i].entry = i;
 
-        /* pci_enable_msix returns positive if we can't get this many. */
-        err = pci_enable_msix(vp_dev->pci_dev, vp_dev->msix_entries, nvectors);
-        if (err > 0)
-                err = -ENOSPC;
+        err = pci_enable_msix_exact(vp_dev->pci_dev,
+                                    vp_dev->msix_entries, nvectors);
         if (err)
                 goto error;
         vp_dev->msix_enabled = 1;