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of/irq: Fix bug in interrupt parsing refactor. 

Commit 2361613206, "of/irq: Refactor interrupt-map parsing" introduced
a bug. The irq parsing will fail for some nodes that don't have a reg
property. It is fixed by deferring the check for reg until it is
actually needed. Also adjust the testcase data to catch the bug.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Tested-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Ming Lei <tom.leiming@gmail.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Cc: Rob Herring <rob.herring@calxeda.com>
This commit is contained in:
Grant Likely 2013-11-01 10:50:50 -07:00
parent 0976c946a6
commit 78119fd106
2 changed files with 14 additions and 13 deletions
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7
arch/arm/boot/dts/testcases/tests-interrupts.dtsi
View File

@ -2,7 +2,8 @@
/ {
testcase-data {
interrupts {
#address-cells = <0>;
#address-cells = <1>;
#size-cells = <1>;
test_intc0: intc0 {
interrupt-controller;
#interrupt-cells = <1>;
@ -29,8 +30,7 @@ test_intmap0: intmap0 {
test_intmap1: intmap1 {
#interrupt-cells = <2>;
#address-cells = <0>;
interrupt-map = <1 2 &test_intc0 15>;
interrupt-map = <0x5000 1 2 &test_intc0 15>;
};
interrupts0 {
@ -44,6 +44,7 @@ interrupts1 {
};
interrupts-extended0 {
reg = <0x5000 0x100>;
interrupts-extended = <&test_intc0 1>,
<&test_intc1 2 3 4>,
<&test_intc2 5 6>,

20
drivers/of/irq.c
View File

@ -147,18 +147,9 @@ int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq)
pr_debug(" -> addrsize=%d\n", addrsize);
/* If we were passed no "reg" property and we attempt to parse
* an interrupt-map, then #address-cells must be 0.
* Fail if it's not.
*/
if (addr == NULL && addrsize != 0) {
pr_debug(" -> no reg passed in when needed !\n");
return -EINVAL;
}
/* Precalculate the match array - this simplifies match loop */
for (i = 0; i < addrsize; i++)
initial_match_array[i] = addr[i];
initial_match_array[i] = addr ? addr[i] : 0;
for (i = 0; i < intsize; i++)
initial_match_array[addrsize + i] = cpu_to_be32(out_irq->args[i]);
@ -174,6 +165,15 @@ int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq)
return 0;
}
/*
* interrupt-map parsing does not work without a reg
* property when #address-cells != 0
*/
if (addrsize && !addr) {
pr_debug(" -> no reg passed in when needed !\n");
goto fail;
}
/* Now look for an interrupt-map */
imap = of_get_property(ipar, "interrupt-map", &imaplen);
/* No interrupt map, check for an interrupt parent */