powerpc/smp: Fix NMI IPI timeout

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The NMI IPI timeout logic is broken, if __smp_send_nmi_ipi() times out
on the first condition, delay_us will be zero which will send it into
the second spin loop with no timeout so it will spin forever.

Fixes: 5b73151fff ("powerpc: NMI IPI make NMI IPIs fully sychronous")
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Nicholas Piggin 2018-11-26 12:01:05 +10:00 • committed by Michael Ellerman

parent bba436309d

commit 1b5fc84aba

1 changed files with 3 additions and 2 deletions

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arch/powerpc/kernel/smp.c

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