In case the Device Tree blob passed by the boot agent supplies both an
'interrupts-extended' and an 'interrupts' property in order to allow for
older kernels to be usable, prefer the new-style 'interrupts-extended'
property which convey a lot more information.
This allows us to have bootloaders willingly maintaining backwards
compatibility with older kernels without entirely deprecating the
'interrupts' property (although that is a clear violation of the binding
specified at
Documentation/devicetree/bindings/interrupt-controller/interrupts.txt)
Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
---
drivers/of/irq.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 3e06a699352d..1af3be2396db 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -301,16 +301,17 @@ int of_irq_parse_one(struct device_node *device, int index, struct of_phandle_ar
/* Get the reg property (if any) */
addr = of_get_property(device, "reg", NULL);
+ /* Try the new-style interrupts-extended */
+ res = of_parse_phandle_with_args(device, "interrupts-extended",
+ "#interrupt-cells", index, out_irq);
+ if (!res)
+ return of_irq_parse_raw(addr, out_irq);
+
/* Get the interrupts property */
intspec = of_get_property(device, "interrupts", &intlen);
- if (intspec == NULL) {
- /* Try the new-style interrupts-extended */
- res = of_parse_phandle_with_args(device, "interrupts-extended",
- "#interrupt-cells", index, out_irq);
- if (res)
- return -EINVAL;
- return of_irq_parse_raw(addr, out_irq);
- }
+ if (intspec == NULL)
+ return -EINVAL;
+
intlen /= sizeof(*intspec);
pr_debug(" intspec=%d intlen=%d\n", be32_to_cpup(intspec), intlen);
--
1.9.1
--
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