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powerpc/powernv: Get cpu only after validity check

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Check for validity of cpu before calling get_hard_smp_processor_id().

Found with coverity.

Signed-off-by: Santosh Sivaraj <santosh@fossix.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Santosh Sivaraj 2017-07-04 09:52:46 +05:30 committed by Michael Ellerman
parent 520eccdfe1
commit 76d98ab462
1 changed files with 2 additions and 1 deletions
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3
arch/powerpc/platforms/powernv/smp.c
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@ -57,7 +57,7 @@ static void pnv_smp_setup_cpu(int cpu)
static int pnv_smp_kick_cpu(int nr)
{
unsigned int pcpu = get_hard_smp_processor_id(nr);
unsigned int pcpu;
unsigned long start_here =
__pa(ppc_function_entry(generic_secondary_smp_init));
long rc;
@ -66,6 +66,7 @@ static int pnv_smp_kick_cpu(int nr)
if (nr < 0 || nr >= nr_cpu_ids)
return -EINVAL;
pcpu = get_hard_smp_processor_id(nr);
/*
* If we already started or OPAL is not supported, we just
* kick the CPU via the PACA