virtio-rng: fix stuck of hot-unplugging busy device

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commit 3856e54837 upstream.

When we try to hot-remove a busy virtio-rng device from QEMU monitor,
the device can't be hot-removed. Because virtio-rng driver hangs at
wait_for_completion_killable().

This patch exits the waiting by completing have_data completion before
unregistering, resets data_avail to avoid the hwrng core use wrong
buffer bytes.

Signed-off-by: Amos Kong <akong@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

...

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Amos Kong 2014-09-11 22:20:39 +09:30 • committed by Luis Henriques

parent d5b57d6538

commit d024fb8a37

1 changed files with 2 additions and 0 deletions

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drivers/char/hw_random/virtio-rng.c

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