From 7a4228bbff769ebf449981a4248616db9f0cffec Mon Sep 17 00:00:00 2001 From: Thomas Petazzoni Date: Tue, 16 May 2017 14:09:04 +0200 Subject: of: irq: use of_irq_get() in of_irq_to_resource() of_irq_to_resource() currently uses irq_of_parse_and_map() to translate a DT interrupt specification into a Linux virtual interrupt number. While this works in most cases, irq_of_parse_and_map() doesn't properly handle the case where the interrupt controller is not yet available (due to deferred probing for example). So instead, use of_irq_get(), which is implemented exactly like irq_of_parse_and_map(), with the exception that if the interrupt controller is not yet available, it returns -EPROBE_DEFER. Obviously, we also handle this error and bail out from of_irq_to_resource() when of_irq_get() returns an error. This allows to avoid silly error messages at boot time caused by irq_create_of_mapping() when the interrupt controller is not available: [ 0.153168] irq: no irq domain found for /ap806/config-space@f0000000/interrupt-controller@3f0100 ! [ 0.154041] irq: no irq domain found for /cp110-master/config-space@f2000000/interrupt-controller@1e0000 ! [ 0.154124] irq: no irq domain found for /cp110-master/config-space@f2000000/interrupt-controller@1e0000 ! [ 0.154207] irq: no irq domain found for /cp110-master/config-space@f2000000/interrupt-controller@1e0000 ! [ 0.154437] irq: no irq domain found for /cp110-master/config-space@f2000000/interrupt-controller@1e0000 ! [ 0.154518] irq: no irq domain found for /cp110-master/config-space@f2000000/interrupt-controller@1e0000 ! Signed-off-by: Thomas Petazzoni Signed-off-by: Rob Herring --- drivers/of/irq.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/of/irq.c b/drivers/of/irq.c index d11437cb1187..6ce72aa65425 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -369,7 +369,10 @@ EXPORT_SYMBOL_GPL(of_irq_parse_one); */ int of_irq_to_resource(struct device_node *dev, int index, struct resource *r) { - int irq = irq_of_parse_and_map(dev, index); + int irq = of_irq_get(dev, index); + + if (irq < 0) + return irq; /* Only dereference the resource if both the * resource and the irq are valid. */ -- cgit