[PATCH v2 0/3] clocksource/vt8500: Fix hangs in small delays

Alexey Charkov alchark at gmail.com
Thu Dec 24 01:12:48 PST 2015

2015-12-24 0:35 GMT+03:00 Roman Volkov <v1ron at mail.ru>:
> From: Roman Volkov <rvolkov at v1ros.org>
> vt8500 hangs in nanosleep() function, starting from commit
> c6eb3f70d4482806dc2d3e1e3c7736f497b1d418, making the system unusable.
> Per investigation, looks like set_next_event() now receives too small
> delta and fails with -ETIME.
> Google group discussion:
> https://groups.google.com/forum/#!topic/vt8500-wm8505-linux-kernel/vDMF_mDOb1k
> v2:
> Address comments by Alexey Charkov. Merge patches to get less amount of
> changes (three patches instead of four).
> Tested on my WM8650, no issues in three days uptime.
> Roman Volkov (3):
>   clocksource/vt8500: Use MIN_OSCR_DELTA from PXA
>   clocksource/vt8500: Remove the 'loops' variable
>   clocksource/vt8500: Add register R/W functions
>  drivers/clocksource/vt8500_timer.c | 98 +++++++++++++++++++++++++++-----------
>  1 file changed, 69 insertions(+), 29 deletions(-)

This whole series looks good to me as far as VT8500 is concerned.
Thanks a lot Roman for fixing it and streamlining the bus

Acked-by: Alexey Charkov <alchark at gmail.com>

Daniel, Thomas, any chance you could push this to -next via your
clocksource tree?

Best regards,

More information about the linux-arm-kernel mailing list