diff options
| author | Scott Wood <scottwood@freescale.com> | 2013-09-26 19:18:18 -0500 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-10-11 16:48:58 +1100 |
| commit | 32dda05f4ec2b854b594bd91590c46c5197d77e1 (patch) | |
| tree | aaaf84a63f8a96ff8073a736aa357104b9f9395c | |
| parent | f036b368196263f648bede42bbbe1c1e6e834d10 (diff) | |
powerpc/mpic: Disable preemption when calling mpic_processor_id()
Otherwise, we get a debug traceback due to the use of
smp_processor_id() (or get_paca()) inside hard_smp_processor_id().
mpic_host_map() is just looking for a default CPU, so it doesn't matter
if we migrate after getting the CPU ID.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/sysdev/mpic.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c index 1be54faf60d..bdcb8588e49 100644 --- a/arch/powerpc/sysdev/mpic.c +++ b/arch/powerpc/sysdev/mpic.c @@ -1088,8 +1088,14 @@ static int mpic_host_map(struct irq_domain *h, unsigned int virq, * is done here. */ if (!mpic_is_ipi(mpic, hw) && (mpic->flags & MPIC_NO_RESET)) { + int cpu; + + preempt_disable(); + cpu = mpic_processor_id(mpic); + preempt_enable(); + mpic_set_vector(virq, hw); - mpic_set_destination(virq, mpic_processor_id(mpic)); + mpic_set_destination(virq, cpu); mpic_irq_set_priority(virq, 8); } |