On Tue, 2018-04-10 at 11:49:33 UTC, Nicholas Piggin wrote:
> The OPAL NVRAM driver does not sleep in case it gets OPAL_BUSY or
> OPAL_BUSY_EVENT from firmware, which causes large scheduling
> latencies, and various lockup errors to trigger (again, BMC reboot
> can cause it).
> Fix this by converting it to the standard form OPAL_BUSY loop that
> sleeps.
> Fixes: 628daa8d5abfd ("powerpc/powernv: Add RTC and NVRAM support plus RTAS 
> fallbacks")
> Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
> Signed-off-by: Nicholas Piggin <npig...@gmail.com>

Applied to powerpc fixes, thanks.



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