Bug: d0e936adbd22 crashes at boot

[Jens Axboe]

Hi,

Booting Linus's tree causes a crash on my laptop, an x1 gen9. This was a bit
difficult to pin down as it crashes before the display is up, but I managed
to narrow it down to:

commit d0e936adbd2250cb03f2e840c6651d18edc22ace
Author: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
Date:   Thu Aug 19 19:40:06 2021 -0700

    cpufreq: intel_pstate: Process HWP Guaranteed change notification

which crashes with a NULL pointer deref in notify_hwp_interrupt() ->
queue_delayed_work_on().

Reverting this change makes the laptop boot fine again.

-- 
Jens Axboe