Re: [PATCH v6] ath9k: sleep for less time when unregistering hwrng

["Toke Høiland-Jørgensen" <toke@toke.dk>]

"Jason A. Donenfeld" <Jason@zx2c4.com> writes:

> Even though hwrng provides a `wait` parameter, it doesn't work very well
> when waiting for a long time. There are numerous deadlocks that emerge
> related to shutdown. Work around this API limitation by waiting for a
> shorter amount of time and erroring more frequently. This commit also
> prevents hwrng from splatting messages to dmesg when there's a timeout
> and switches to using schedule_timeout_interruptible(), so that the
> kthread can be stopped.
>
> Reported-by: Gregory Erwin <gregerwin256@gmail.com>
> Tested-by: Gregory Erwin <gregerwin256@gmail.com>
> Cc: Toke Høiland-Jørgensen <toke@redhat.com>
> Cc: Kalle Valo <kvalo@kernel.org>
> Cc: Rui Salvaterra <rsalvaterra@gmail.com>
> Cc: Herbert Xu <herbert@gondor.apana.org.au>
> Cc: stable@vger.kernel.org
> Fixes: fcd09c90c3c5 ("ath9k: use hw_random API instead of directly dumping into random.c")
> Link: https://lore.kernel.org/all/CAO+Okf6ZJC5-nTE_EJUGQtd8JiCkiEHytGgDsFGTEjs0c00giw@mail.gmail.com/
> Link: https://lore.kernel.org/lkml/CAO+Okf5k+C+SE6pMVfPf-d8MfVPVq4PO7EY8Hys_DVXtent3HA@mail.gmail.com/
> Link: https://bugs.archlinux.org/task/75138
> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>