sysctl on Pinebook never finishes

[John Klos <john%ziaspace.com@localhost>]

Hi,

Does anyone know why sysctl -a never completes on a Pinebook (not Pro - 
first gen) running -current from today?

sysctl -a
...
hw.drm2.radeon_no_wb = 0
hw.pwmbacklight0.levels = 0 5 10 15 20 30 40 55 70 85 100
hw.pwmbacklight0.level = 10
...

SIGINFO shows:
[ 124.5394678] load: 0.62  cmd: sysctl 1973 [sun8isy] 0.09u 0.05s 0% 1876k

I see sun8isy has to do with sun8i_crypto, so I wondered if this was a 
lack of entropy issue. After adding entropy, the kernel emitted:

[ 46451.878690] sun8icrypto0: no free channels

Then, sysctl -a works. PR?

Thanks,
John