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Fix the usage of get_c0_compare_int: override cp0_compare_irq if the returned
value is in the MIPS CPU IRQ range to ensure that c0_compare_int_usable()
still works.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Index: linux-2.6.32.7/arch/mips/kernel/cevt-r4k.c
===================================================================
--- linux-2.6.32.7.orig/arch/mips/kernel/cevt-r4k.c 2010-01-29 00:06:20.000000000 +0100
+++ linux-2.6.32.7/arch/mips/kernel/cevt-r4k.c 2010-02-03 16:59:28.310430064 +0100
@@ -168,20 +168,23 @@
struct clock_event_device *cd;
unsigned int irq;
- if (!cpu_has_counter || !mips_hpt_frequency)
- return -ENXIO;
-
- if (!c0_compare_int_usable())
- return -ENXIO;
-
/*
* With vectored interrupts things are getting platform specific.
* get_c0_compare_int is a hook to allow a platform to return the
* interrupt number of it's liking.
*/
irq = MIPS_CPU_IRQ_BASE + cp0_compare_irq;
- if (get_c0_compare_int)
+ if (get_c0_compare_int) {
irq = get_c0_compare_int();
+ if ((irq >= MIPS_CPU_IRQ_BASE) && (irq < MIPS_CPU_IRQ_BASE + 8))
+ cp0_compare_irq = irq - MIPS_CPU_IRQ_BASE;
+ }
+
+ if (!cpu_has_counter || !mips_hpt_frequency)
+ return -ENXIO;
+
+ if (!c0_compare_int_usable())
+ return -ENXIO;
cd = &per_cpu(mips_clockevent_device, cpu);
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