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authorYinghai Lu <yinghai@kernel.org>2009-01-31 14:50:07 -0800
committerIngo Molnar <mingo@elte.hu>2009-02-01 11:36:31 +0100
commit10b888d6cec2688e65e9e128b14bf98ecd199da2 (patch)
treeb29736b4fabe128b8a3db00b22c71e98424d03d4 /arch
parent9a8ecae87a2b698964b1db9ea504ba1099f479fc (diff)
downloadop-kernel-dev-10b888d6cec2688e65e9e128b14bf98ecd199da2.zip
op-kernel-dev-10b888d6cec2688e65e9e128b14bf98ecd199da2.tar.gz
irq, x86: fix lock status with numa_migrate_irq_desc
Eric Paris reported: > I have an hp dl785g5 which is unable to successfully run > 2.6.29-0.66.rc3.fc11.x86_64 or 2.6.29-rc2-next-20090126. During bootup > (early in userspace daemons starting) I get the below BUG, which quickly > renders the machine dead. I assume it is because sparse_irq_lock never > gets released when the BUG kills that task. Adjust lock sequence when migrating a descriptor with CONFIG_NUMA_MIGRATE_IRQ_DESC enabled. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/io_apic.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c
index 1c4a130..9b0c480 100644
--- a/arch/x86/kernel/io_apic.c
+++ b/arch/x86/kernel/io_apic.c
@@ -2528,14 +2528,15 @@ static void irq_complete_move(struct irq_desc **descp)
vector = ~get_irq_regs()->orig_ax;
me = smp_processor_id();
+
+ if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain)) {
#ifdef CONFIG_NUMA_MIGRATE_IRQ_DESC
*descp = desc = move_irq_desc(desc, me);
/* get the new one */
cfg = desc->chip_data;
#endif
-
- if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain))
send_cleanup_vector(cfg);
+ }
}
#else
static inline void irq_complete_move(struct irq_desc **descp) {}
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