Merge commit 'v3.2-rc3' into stable/for-linus-3.3

* commit 'v3.2-rc3': (412 commits)
  Linux 3.2-rc3
  virtio-pci: make reset operation safer
  virtio-mmio: Correct the name of the guest features selector
  virtio: add HAS_IOMEM dependency to MMIO platform bus driver
  eCryptfs: Extend array bounds for all filename chars
  eCryptfs: Flush file in vma close
  eCryptfs: Prevent file create race condition
  regulator: TPS65910: Fix VDD1/2 voltage selector count
  i2c: Make i2cdev_notifier_call static
  i2c: Delete ANY_I2C_BUS
  i2c: Fix device name for 10-bit slave address
  i2c-algo-bit: Generate correct i2c address sequence for 10-bit target
  drm: integer overflow in drm_mode_dirtyfb_ioctl()
  Revert "of/irq: of_irq_find_parent: check for parent equal to child"
  drivers/gpu/vga/vgaarb.c: add missing kfree
  drm/radeon/kms/atom: unify i2c gpio table handling
  drm/radeon/kms: fix up gpio i2c mask bits for r4xx for real
  ttm: Don't return the bo reserved on error path
  mount_subtree() pointless use-after-free
  iio: fix a leak due to improper use of anon_inode_getfd()
  ...

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c
index 3d1bf41e8892..03d1984bd363 100644
--- 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 */