linux-kernel - [PATCH 2/2] MIPS: BMIPS: Migrate interrupts during bmips_cpu

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Message-Id: <1477948607-12899-3-git-send-email-f.fainelli@gmail.com>
Date:   Mon, 31 Oct 2016 14:16:47 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     linux-mips@...ux-mips.org
Cc:     ralf@...ux-mips.org, cernekee@...il.com, jaedon.shin@...il.com,
        justinpopo6@...il.com, tglx@...uxtronix.de, marc.zyngier@....com,
        jason@...edaemon.net, linux-kernel@...r.kernel.org,
        Florian Fainelli <f.fainelli@...il.com>
Subject: [PATCH 2/2] MIPS: BMIPS: Migrate interrupts during bmips_cpu_disable

While we properly disabled the per-CPU timer interrupt, we also need to
make sure that all interrupts that can possibly have this CPU in their
smp_affinity mask also have a chance to see this interrupt migrated to a
CPU not being taken offline.

Fixes: 230b6ff57552 ("MIPS: BMIPS: Mask off timer IRQs when hot-unplugging a CPU")
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 arch/mips/kernel/smp-bmips.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/kernel/smp-bmips.c b/arch/mips/kernel/smp-bmips.c
index 6d0f1321e084..37dffda8f16b 100644
--- a/arch/mips/kernel/smp-bmips.c
+++ b/arch/mips/kernel/smp-bmips.c
@@ -365,6 +365,8 @@ static int bmips_cpu_disable(void)
 	set_cpu_online(cpu, false);
 	calculate_cpu_foreign_map();
 	cpumask_clear_cpu(cpu, &cpu_callin_map);
+
+	irq_cpu_offline();
 	clear_c0_status(IE_IRQ5);
 
 	local_flush_tlb_all();
-- 
2.7.4