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44 lines
1.5 KiB
44 lines
1.5 KiB
From cde59bef2f155fc38413e470ff0e4672623cdbec Mon Sep 17 00:00:00 2001
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From: Tony Wu <tung7970@gmail.com>
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Date: Fri, 21 Jun 2013 10:13:08 +0000
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Subject: [PATCH 201/215] MIPS: GIC: Fix gic_set_affinity infinite loop
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There is an infinite loop in gic_set_affinity. When irq_set_affinity
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gets called on gic controller, it blocks forever.
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Signed-off-by: Tony Wu <tung7970@gmail.com>
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Cc: Steven J. Hill <Steven.Hill@imgtec.com>
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Cc: linux-mips@linux-mips.org
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Patchwork: https://patchwork.linux-mips.org/patch/5537/
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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(cherry picked from commit c214c03512b67e56dea3f4471705f8caae49553a)
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---
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arch/mips/kernel/irq-gic.c | 15 +++++++--------
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1 file changed, 7 insertions(+), 8 deletions(-)
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--- a/arch/mips/kernel/irq-gic.c
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+++ b/arch/mips/kernel/irq-gic.c
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@@ -219,16 +219,15 @@ static int gic_set_affinity(struct irq_d
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/* Assumption : cpumask refers to a single CPU */
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spin_lock_irqsave(&gic_lock, flags);
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- for (;;) {
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- /* Re-route this IRQ */
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- GIC_SH_MAP_TO_VPE_SMASK(irq, first_cpu(tmp));
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- /* Update the pcpu_masks */
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- for (i = 0; i < NR_CPUS; i++)
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- clear_bit(irq, pcpu_masks[i].pcpu_mask);
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- set_bit(irq, pcpu_masks[first_cpu(tmp)].pcpu_mask);
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+ /* Re-route this IRQ */
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+ GIC_SH_MAP_TO_VPE_SMASK(irq, first_cpu(tmp));
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+
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+ /* Update the pcpu_masks */
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+ for (i = 0; i < NR_CPUS; i++)
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+ clear_bit(irq, pcpu_masks[i].pcpu_mask);
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+ set_bit(irq, pcpu_masks[first_cpu(tmp)].pcpu_mask);
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- }
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cpumask_copy(d->affinity, cpumask);
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spin_unlock_irqrestore(&gic_lock, flags);
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