powerpc/rtas: enture rtas_call is called with MMU enabled

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rtas_call must not be called with the MMU disabled because in case
of rtas error, log_error is called which requires MMU enabled. Add
a test and warning for this.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220308135047.478297-14-npiggin@gmail.com

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Nicholas Piggin 2022-03-08 23:50:46 +10:00 • committed by Michael Ellerman

parent 014b2e896c

commit 804c0a166f

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arch/powerpc/kernel/rtas.c

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