diff options
| author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2017-05-16 14:09:04 +0200 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2017-05-16 09:11:22 -0500 |
| commit | 7a4228bbff769ebf449981a4248616db9f0cffec (patch) | |
| tree | e91223b383a97dcf5693d4ca82a207ff3edbaccf /drivers/of/irq.c | |
| parent | a2b3cf070920959d49ec3e1fd544b1f8784b58b5 (diff) | |
| download | linux-7a4228bbff769ebf449981a4248616db9f0cffec.tar.bz2 | |
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 <thomas.petazzoni@free-electrons.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of/irq.c')
| -rw-r--r-- | drivers/of/irq.c | 5 |
1 files changed, 4 insertions, 1 deletions
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. */ |