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
flag
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
---
changelog:
v1->v2:
- updated commit log for WRITE_ONCE usage
- improved vqs protection patch-3 for using natural structure alignment
v0->v1:
- fixed below comments from Michael
- fixed typo in patch4 in comment
- using WRITE_ONCE instead of smp_store_release()
- using spinlock instead of rwlock
- improved comment in patch
- removed fixes tag in patch-1
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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