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

[Herbert Xu]

On Mon, Jun 27, 2022 at 02:07:35PM +0200, Jason A. Donenfeld wrote:
> 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@xxxxxxxxx>
> Tested-by: Gregory Erwin <gregerwin256@xxxxxxxxx>
> Cc: Toke Høiland-Jørgensen <toke@xxxxxxxxxx>
> Cc: Kalle Valo <kvalo@xxxxxxxxxx>
> Cc: Rui Salvaterra <rsalvaterra@xxxxxxxxx>
> Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: fcd09c90c3c5 ("ath9k: use hw_random API instead of directly dumping into random.c")
> Link: https://lore.kernel.org/all/CAO+Okf6ZJC5-nTE_EJUGQtd8JiCkiEHytGgDsFGTEjs0c00giw@xxxxxxxxxxxxxx/
> Link: https://lore.kernel.org/lkml/CAO+Okf5k+C+SE6pMVfPf-d8MfVPVq4PO7EY8Hys_DVXtent3HA@xxxxxxxxxxxxxx/
> Link: https://bugs.archlinux.org/task/75138
> Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx>
> ---
>  drivers/char/hw_random/core.c        |  5 +++--
>  drivers/net/wireless/ath/ath9k/rng.c | 20 +++-----------------
>  2 files changed, 6 insertions(+), 19 deletions(-)

Acked-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>

Thanks,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
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