Merge remote branch 'wireless-next/master' into ath6kl-next

[~andy/linux] / drivers / virtio / virtio_pci.c

diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c
index 3d1bf41e8892b8e2150a51403726ebb52ea9d56c..baabb7937ec2c338fc813fb91cfaac21b0c94484 100644 (file)
--- a/drivers/virtio/virtio_pci.c
+++ b/drivers/virtio/virtio_pci.c
@@ -169,11 +169,29 @@ static void vp_set_status(struct virtio_device *vdev, u8 status)
        iowrite8(status, vp_dev->ioaddr + VIRTIO_PCI_STATUS);
 }
 
+/* wait for pending irq handlers */
+static void vp_synchronize_vectors(struct virtio_device *vdev)
+{
+       struct virtio_pci_device *vp_dev = to_vp_device(vdev);
+       int i;
+
+       if (vp_dev->intx_enabled)
+               synchronize_irq(vp_dev->pci_dev->irq);
+
+       for (i = 0; i < vp_dev->msix_vectors; ++i)
+               synchronize_irq(vp_dev->msix_entries[i].vector);
+}
+
 static void vp_reset(struct virtio_device *vdev)
 {
        struct virtio_pci_device *vp_dev = to_vp_device(vdev);
        /* 0 status means a reset. */
        iowrite8(0, vp_dev->ioaddr + VIRTIO_PCI_STATUS);
+       /* Flush out the status write, and flush in device writes,
+        * including MSi-X interrupts, if any. */
+       ioread8(vp_dev->ioaddr + VIRTIO_PCI_STATUS);
+       /* Flush pending VQ/configuration callbacks. */
+       vp_synchronize_vectors(vdev);
 }
 
 /* the notify function used when creating a virt queue */
@@ -580,6 +598,13 @@ static int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs,
                                  false, false);
 }
 
+static const char *vp_bus_name(struct virtio_device *vdev)
+{
+       struct virtio_pci_device *vp_dev = to_vp_device(vdev);
+
+       return pci_name(vp_dev->pci_dev);
+}
+
 static struct virtio_config_ops virtio_pci_config_ops = {
        .get            = vp_get,
        .set            = vp_set,
@@ -590,6 +615,7 @@ static struct virtio_config_ops virtio_pci_config_ops = {
        .del_vqs        = vp_del_vqs,
        .get_features   = vp_get_features,
        .finalize_features = vp_finalize_features,
+       .bus_name       = vp_bus_name,
 };
 
 static void virtio_pci_release_dev(struct device *_d)