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| author |   Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-06-04 16:42:29 -0400 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-06-10 08:43:31 -0400 |
| commit | ee336e10d5650d408efb66f634d462b9eb39c191 (patch) | |
| tree | cc9e3ef418118d97f83bfcea09e85bf500ed2e6f /arch/x86/xen/smp.c | |
| parent | xen/smp: Introduce a common structure to contain the IRQ name and interrupt line. (diff) | |
| download | linux-dev-ee336e10d5650d408efb66f634d462b9eb39c191.tar.xz linux-dev-ee336e10d5650d408efb66f634d462b9eb39c191.zip | |
xen/smp: Set the per-cpu IRQ number to a valid default.
When we free it we want to make sure to set it to a default
value of -1 so that we don't double-free it (in case somebody
calls us twice).
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/x86/xen/smp.c')
| -rw-r--r-- | arch/x86/xen/smp.c | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c index f5b29ecdf18d..6a483cdd28c9 100644 --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -43,10 +43,10 @@ struct xen_common_irq { int irq; char *name; }; -static DEFINE_PER_CPU(struct xen_common_irq, xen_resched_irq); -static DEFINE_PER_CPU(struct xen_common_irq, xen_callfunc_irq); -static DEFINE_PER_CPU(struct xen_common_irq, xen_callfuncsingle_irq); -static DEFINE_PER_CPU(struct xen_common_irq, xen_irq_work); +static DEFINE_PER_CPU(struct xen_common_irq, xen_resched_irq) = { .irq = -1 }; +static DEFINE_PER_CPU(struct xen_common_irq, xen_callfunc_irq) = { .irq = -1 }; +static DEFINE_PER_CPU(struct xen_common_irq, xen_callfuncsingle_irq) = { .irq = -1 }; +static DEFINE_PER_CPU(struct xen_common_irq, xen_irq_work) = { .irq = -1 }; static DEFINE_PER_CPU(struct xen_common_irq, xen_debug_irq) = { .irq = -1 }; static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id); @@ -104,20 +104,30 @@ static void __cpuinit cpu_bringup_and_idle(void) static void xen_smp_intr_free(unsigned int cpu) { - if (per_cpu(xen_resched_irq, cpu).irq >= 0) + if (per_cpu(xen_resched_irq, cpu).irq >= 0) { unbind_from_irqhandler(per_cpu(xen_resched_irq, cpu).irq, NULL); - if (per_cpu(xen_callfunc_irq, cpu).irq >= 0) + per_cpu(xen_resched_irq, cpu).irq = -1; + } + if (per_cpu(xen_callfunc_irq, cpu).irq >= 0) { unbind_from_irqhandler(per_cpu(xen_callfunc_irq, cpu).irq, NULL); - if (per_cpu(xen_debug_irq, cpu).irq >= 0) + per_cpu(xen_callfunc_irq, cpu).irq = -1; + } + if (per_cpu(xen_debug_irq, cpu).irq >= 0) { unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu).irq, NULL); - if (per_cpu(xen_callfuncsingle_irq, cpu).irq >= 0) + per_cpu(xen_debug_irq, cpu).irq = -1; + } + if (per_cpu(xen_callfuncsingle_irq, cpu).irq >= 0) { unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu).irq, NULL); + per_cpu(xen_callfuncsingle_irq, cpu).irq = -1; + } if (xen_hvm_domain()) return; - if (per_cpu(xen_irq_work, cpu).irq >= 0) + if (per_cpu(xen_irq_work, cpu).irq >= 0) { unbind_from_irqhandler(per_cpu(xen_irq_work, cpu).irq, NULL); + per_cpu(xen_irq_work, cpu).irq = -1; + } }; static int xen_smp_intr_init(unsigned int cpu) { |