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genirq/ipi: Fixup checks against nr_cpu_ids 

Valid CPU ids are [0, nr_cpu_ids-1] inclusive.

Fixes: 3b8e29a82d ("genirq: Implement ipi_send_mask/single()")
Fixes: f9bce791ae ("genirq: Add a new function to get IPI reverse mapping")
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20170819095751.GB27864@avx2
This commit is contained in:
Alexey Dobriyan 2017-08-19 12:57:51 +03:00 committed by Thomas Gleixner
parent e8f241893d
commit 8fbbe2d7cc
1 changed files with 2 additions and 2 deletions
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4
kernel/irq/ipi.c
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@ -165,7 +165,7 @@ irq_hw_number_t ipi_get_hwirq(unsigned int irq, unsigned int cpu)
struct irq_data *data = irq_get_irq_data(irq);
struct cpumask *ipimask = data ? irq_data_get_affinity_mask(data) : NULL;
if (!data || !ipimask || cpu > nr_cpu_ids)
if (!data || !ipimask || cpu >= nr_cpu_ids)
return INVALID_HWIRQ;
if (!cpumask_test_cpu(cpu, ipimask))
@ -195,7 +195,7 @@ static int ipi_send_verify(struct irq_chip *chip, struct irq_data *data,
if (!chip->ipi_send_single && !chip->ipi_send_mask)
return -EINVAL;
if (cpu > nr_cpu_ids)
if (cpu >= nr_cpu_ids)
return -EINVAL;
if (dest) {