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| author | Yingjoe Chen <yingjoe.chen@mediatek.com> | 2014-11-06 22:20:15 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-11-23 13:01:46 +0100 |
| commit | 0cc01abab6412f3a76256bb57ca58dcb94a6edc7 (patch) | |
| tree | 563060ad84e9d66eb1b8a1ad191b03cb775529fb /kernel/irq | |
| parent | f8264e34965aaf43203912ed8f7b543c00c8d70f (diff) | |
| download | linux-0cc01abab6412f3a76256bb57ca58dcb94a6edc7.tar.gz | |
irqdomain: Do irq_find_mapping and set_type for hierarchy irqdomain in case OF
It is possible to call irq_create_of_mapping to create/translate the same IRQ from DT for multiple times. Perform irq_find_mapping check and set_type for hierarchy irqdomain in irq_create_of_mapping() to avoid duplicate these functionality in all outer most irqdomain. Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com> Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Yingjoe Chen <yingjoe.chen@mediatek.com> Cc: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/irqdomain.c | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index 43f3be6fac70..9a61de21933a 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -478,11 +478,6 @@ unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data) return 0; } - if (irq_domain_is_hierarchy(domain)) { - virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, irq_data); - return virq <= 0 ? 0 : virq; - } - /* If domain has no translation, then we assume interrupt line */ if (domain->ops->xlate == NULL) hwirq = irq_data->args[0]; @@ -492,10 +487,24 @@ unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data) return 0; } - /* Create mapping */ - virq = irq_create_mapping(domain, hwirq); - if (!virq) - return virq; + if (irq_domain_is_hierarchy(domain)) { + /* + * If we've already configured this interrupt, + * don't do it again, or hell will break loose. + */ + virq = irq_find_mapping(domain, hwirq); + if (virq) + return virq; + + virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, irq_data); + if (virq <= 0) + return 0; + } else { + /* Create mapping */ + virq = irq_create_mapping(domain, hwirq); + if (!virq) + return virq; + } /* Set type if specified and different than the current one */ if (type != IRQ_TYPE_NONE && |