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powerpc/pseries: reset the RCU watchdogs after a LPM

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The RCU watchdog timer should be reset when restarting the CPU after a
Live Partition Mobility operation.

Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com>
Acked-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Combine comments into a single comment block]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221125173204.15329-1-ldufour@linux.ibm.com
This commit is contained in:
Laurent Dufour 2022-11-25 18:32:04 +01:00 committed by Michael Ellerman
parent 340a4a9f87
commit 9b574cfab7
1 changed files with 5 additions and 2 deletions
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7
arch/powerpc/platforms/pseries/mobility.c
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@ -635,10 +635,13 @@ retry:
prod_others();
}
/*
* Execution may have been suspended for several seconds, so
* reset the watchdog.
* Execution may have been suspended for several seconds, so reset
* the watchdogs. touch_nmi_watchdog() also touches the soft lockup
* watchdog.
*/
rcu_cpu_stall_reset();
touch_nmi_watchdog();
return ret;
}