ath9k: sleep for less time when unregistering hwrng

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 prevents calling msleep_interruptible() for tons of time when a
thread is supposed to be shutting down, since msleep_interruptible()
isn't actually interrupted by kthread_stop().

Reported-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>

0 files changed, 0 insertions, 0 deletions