[git:v4l-dvb/master] MIPS: Fixup of the r4k timer

[Patch from Wu Zhangjin <linuxtv-commits-bounces@linuxtv.org>]

From: Wu Zhangjin <wuzhangjin@gmail.com>

As reported by Maxime Bizon, the commit "MIPS: PowerTV: Fix support for
timer interrupts with > 64 external IRQs" have broken the r4k timer
since it didn't initialize the cp0_compare_irq_shift variable used in
c0_compare_int_pending() on the architectures whose cpu_has_mips_r2 is
false.

This patch fixes it via initializing the cp0_compare_irq_shift as the
cp0_compare_irq used in the old c0_compare_int_pending().

Reported-by: Maxime Bizon <mbizon@freebox.fr>
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: David VomLehn <dvomlehn@cisco.com>
Cc: mbizon@freebox.fr
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/922/
Tested-by: Shane McDonald <mcdonald.shane@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

 arch/mips/kernel/traps.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

---

http://git.linuxtv.org/v4l-dvb.git?a=commitdiff;h=f4fc580bec5fb76560329c8c537b9b71d8d032b6

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 338dfe8..31b204b 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1501,6 +1501,7 @@ void __cpuinit per_cpu_trap_init(void)
                        cp0_perfcount_irq = -1;
        } else {
                cp0_compare_irq = CP0_LEGACY_COMPARE_IRQ;
+               cp0_compare_irq_shift = cp0_compare_irq;
                cp0_perfcount_irq = -1;
        }