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powerpc/mpic: Break cpumask abstraction earlier

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mpic_set_affinity is allocating and freeing a cpumask var even though
it was breaking the cpumask abstraction when passing the mask to
mpic_physmask.  It also didn't have any check for allocatin failure.

Break the cpumask abstraction earlier and use simple bitwise and of the
bits from the mask with the bits of cpu_online_mask.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Milton Miller 2011-05-10 19:29:02 +00:00 committed by Benjamin Herrenschmidt
parent ebc0421510
commit 2a116f3dd0
1 changed files with 3 additions and 7 deletions
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arch/powerpc/sysdev/mpic.c
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@ -821,16 +821,12 @@ int mpic_set_affinity(struct irq_data *d, const struct cpumask *cpumask,
mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION), 1 << cpuid);
} else {
cpumask_var_t tmp;
u32 mask = cpumask_bits(cpumask)[0];
alloc_cpumask_var(&tmp, GFP_KERNEL);
cpumask_and(tmp, cpumask, cpu_online_mask);
mask &= cpumask_bits(cpu_online_mask)[0];
mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION),
mpic_physmask(cpumask_bits(tmp)[0]));
free_cpumask_var(tmp);
mpic_physmask(mask));
}
return 0;