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| author | Michael S. Tsirkin <[email protected]> | 2018-04-20 17:24:23 +0000 |
|---|---|---|
| committer | Michael S. Tsirkin <[email protected]> | 2018-04-25 17:41:16 +0000 |
| commit | a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b (patch) | |
| tree | 01374a64530550c86ddf3bc55b55c9366dbdb62d /fs/proc/proc_net.c | |
| parent | virtio: add ability to iterate over vqs (diff) | |
| download | kernel-a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b.tar.gz kernel-a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b.zip | |
virtio_console: free buffers after reset
Console driver is out of spec. The spec says:
A driver MUST NOT decrement the available idx on a live
virtqueue (ie. there is no way to “unexpose” buffers).
and it does exactly that by trying to detach unused buffers
without doing a device reset first.
Defer detaching the buffers until device unplug.
Of course this means we might get an interrupt for
a vq without an attached port now. Handle that by
discarding the consumed buffer.
Reported-by: Tiwei Bie <[email protected]>
Fixes: b3258ff1d6 ("virtio: Decrement avail idx on buffer detach")
Cc: [email protected]
Signed-off-by: Michael S. Tsirkin <[email protected]>
Diffstat (limited to 'fs/proc/proc_net.c')
0 files changed, 0 insertions, 0 deletions