[PATCH 0/4] virtio short improvements

Hi,

This series contains small improvements for virtio pci driver.
The main idea support surprise removal of virtio pci device.

Patches 1 to 3 prepare the code to handle surprise removal by marking
the device as broken in patch-4.

Patch summary:
patch-1: ensures that compiler optimization doesn't occur on vq->broken bit
patch-2: maintains the mirror sequence on VQ delete and VQ create
patch-3: protects vqs list for simultaneous access from reader and a writer
patch-4: handles surprise removal of virtio pci device which avoids
         call trace and system lockup

Parav Pandit (4):
  virtio: Improve vq->broken access to avoid any compiler optimization
  virtio: Keep vring_del_virtqueue() mirror of VQ create
  virtio: Protect vqs list access
  virtio_pci: Support surprise removal of virtio pci device

 drivers/virtio/virtio.c            |  1 +
 drivers/virtio/virtio_pci_common.c |  7 +++++++
 drivers/virtio/virtio_ring.c       | 17 ++++++++++++++---
 include/linux/virtio.h             |  1 +
 4 files changed, 23 insertions(+), 3 deletions(-)

-- 
2.27.0

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