From 826e99be6ab5189dbfb096389016ffb8d20a683e Mon Sep 17 00:00:00 2001 From: James Hogan Date: Wed, 13 Jul 2016 14:12:45 +0100 Subject: MIPS: SMP: Update cpu_foreign_map on CPU disable When a CPU is disabled via CPU hotplug, cpu_foreign_map is not updated. This could result in cache management SMP calls being sent to offline CPUs instead of online siblings in the same core. Add a call to calculate_cpu_foreign_map() in the various MIPS cpu disable callbacks after set_cpu_online(). All cases are updated for consistency and to keep cpu_foreign_map strictly up to date, not just those which may support hardware multithreading. Fixes: cccf34e9411c ("MIPS: c-r4k: Fix cache flushing for MT cores") Signed-off-by: James Hogan Cc: Paul Burton Cc: David Daney Cc: Kevin Cernekee Cc: Florian Fainelli Cc: Huacai Chen Cc: Hongliang Tao Cc: Hua Yan Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/13799/ Signed-off-by: Ralf Baechle --- arch/mips/cavium-octeon/smp.c | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/mips/cavium-octeon/smp.c') diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c index 33aab89259f3..4d457d602d3b 100644 --- a/arch/mips/cavium-octeon/smp.c +++ b/arch/mips/cavium-octeon/smp.c @@ -271,6 +271,7 @@ static int octeon_cpu_disable(void) return -ENOTSUPP; set_cpu_online(cpu, false); + calculate_cpu_foreign_map(); cpumask_clear_cpu(cpu, &cpu_callin_map); octeon_fixup_irqs(); -- cgit