diff options
Diffstat (limited to 'target/linux/atheros/patches-2.6.32/001-get_c0_compare_int_fix.patch')
-rw-r--r-- | target/linux/atheros/patches-2.6.32/001-get_c0_compare_int_fix.patch | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/target/linux/atheros/patches-2.6.32/001-get_c0_compare_int_fix.patch b/target/linux/atheros/patches-2.6.32/001-get_c0_compare_int_fix.patch new file mode 100644 index 0000000000..ab0ffdf6f9 --- /dev/null +++ b/target/linux/atheros/patches-2.6.32/001-get_c0_compare_int_fix.patch @@ -0,0 +1,41 @@ +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); + |