Searched hist:b3258ff1d6086bd2b9eeb556844a868ad7d49bc8 (Results 1 – 1 of 1) sorted by relevance
| /openbmc/linux/drivers/virtio/ |
| H A D | virtio_ring.c | diff b3258ff1d6086bd2b9eeb556844a868ad7d49bc8 Wed Mar 16 08:42:10 CDT 2011 Amit Shah <amit.shah@redhat.com> virtio: Decrement avail idx on buffer detach
When detaching a buffer from a vq, the avail.idx value should be
decremented as well.
This was noticed by hot-unplugging a virtio console port and then
plugging in a new one on the same number (re-using the vqs which were
just 'disowned'). qemu reported
'Guest moved used index from 0 to 256'
when any IO was attempted on the new port.
CC: stable@kernel.org
Reported-by: juzhang <juzhang@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
|