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| author | Jiang Liu <jiang.liu@linux.intel.com> | 2014-10-27 16:11:58 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-12-16 14:08:16 +0100 |
| commit | b794ef26f1b08f712f970fe07290b96f9e070746 (patch) | |
| tree | e66a23783670bbf57f14bb6257bbfb8373fbecdb /arch/x86 | |
| parent | cb39288cd6c6dfd0e87c6e161d9da1ec6974f4b8 (diff) | |
| download | linux-b794ef26f1b08f712f970fe07290b96f9e070746.tar.gz linux-b794ef26f1b08f712f970fe07290b96f9e070746.tar.bz2 linux-b794ef26f1b08f712f970fe07290b96f9e070746.zip | |
x86, irq: Protect __clear_irq_vector() with vector_lock
Function __clear_irq_vector() accesses vector related data structure,
so protect it with vector_lock. Also rename it as clear_irq_vector().
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Link: http://lkml.kernel.org/r/1414397531-28254-8-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/apic/io_apic.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 4d871339ba4f..ab8ca9327c06 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1349,10 +1349,12 @@ int assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) return err; } -static void __clear_irq_vector(int irq, struct irq_cfg *cfg) +static void clear_irq_vector(int irq, struct irq_cfg *cfg) { int cpu, vector; + unsigned long flags; + raw_spin_lock_irqsave(&vector_lock, flags); BUG_ON(!cfg->vector); vector = cfg->vector; @@ -1362,8 +1364,11 @@ static void __clear_irq_vector(int irq, struct irq_cfg *cfg) cfg->vector = 0; cpumask_clear(cfg->domain); - if (likely(!cfg->move_in_progress)) + if (likely(!cfg->move_in_progress)) { + raw_spin_unlock_irqrestore(&vector_lock, flags); return; + } + for_each_cpu_and(cpu, cfg->old_domain, cpu_online_mask) { for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) { if (per_cpu(vector_irq, cpu)[vector] != irq) @@ -1373,6 +1378,7 @@ static void __clear_irq_vector(int irq, struct irq_cfg *cfg) } } cfg->move_in_progress = 0; + raw_spin_unlock_irqrestore(&vector_lock, flags); } void __setup_vector_irq(int cpu) @@ -1499,7 +1505,7 @@ static void setup_ioapic_irq(unsigned int irq, struct irq_cfg *cfg, &dest)) { pr_warn("Failed to obtain apicid for ioapic %d, pin %d\n", mpc_ioapic_id(attr->ioapic), attr->ioapic_pin); - __clear_irq_vector(irq, cfg); + clear_irq_vector(irq, cfg); return; } @@ -1513,7 +1519,7 @@ static void setup_ioapic_irq(unsigned int irq, struct irq_cfg *cfg, if (x86_io_apic_ops.setup_entry(irq, &entry, dest, cfg->vector, attr)) { pr_warn("Failed to setup ioapic entry for ioapic %d, pin %d\n", mpc_ioapic_id(attr->ioapic), attr->ioapic_pin); - __clear_irq_vector(irq, cfg); + clear_irq_vector(irq, cfg); return; } @@ -3083,12 +3089,9 @@ int arch_setup_hwirq(unsigned int irq, int node) void arch_teardown_hwirq(unsigned int irq) { struct irq_cfg *cfg = irq_cfg(irq); - unsigned long flags; free_remapped_irq(irq); - raw_spin_lock_irqsave(&vector_lock, flags); - __clear_irq_vector(irq, cfg); - raw_spin_unlock_irqrestore(&vector_lock, flags); + clear_irq_vector(irq, cfg); free_irq_cfg(irq, cfg); } |