Files
linux/drivers
Michael S. Tsirkin 32aef620e6 virtio_console: break out of buf poll on remove
[ Upstream commit 0e7174b9d5 ]

A common pattern for device reset is currently:
vdev->config->reset(vdev);
.. cleanup ..

reset prevents new interrupts from arriving and waits for interrupt
handlers to finish.

However if - as is common - the handler queues a work request which is
flushed during the cleanup stage, we have code adding buffers / trying
to get buffers while device is reset. Not good.

This was reproduced by running
	modprobe virtio_console
	modprobe -r virtio_console
in a loop.

Fix this up by calling virtio_break_device + flush before reset.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1786239
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-04-08 14:22:46 +02:00
..
2021-09-08 11:50:26 -07:00
2022-03-08 19:12:31 +01:00
2022-03-02 11:48:04 +01:00
2021-11-18 19:16:08 +01:00
2022-03-08 19:12:41 +01:00
2021-12-22 09:32:39 +01:00