The 'mult' element of struct clock_event_device must never be wider
than 32-bits. If it were, it would get truncated when used by
clockevent_delta2ns() when this calls do_div().
We can meet this requirement by using clockevent_set_clock() to set
the MULT and SHIFT values.
Signed-off-by: David Daney <ddaney@xxxxxxxxxxxxxxxxxx>
CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
arch/mips/kernel/cevt-r4k.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/arch/mips/kernel/cevt-r4k.c b/arch/mips/kernel/cevt-r4k.c
index 0b2450c..2a4d50f 100644
--- a/arch/mips/kernel/cevt-r4k.c
+++ b/arch/mips/kernel/cevt-r4k.c
@@ -163,7 +163,6 @@ int c0_compare_int_usable(void)
int __cpuinit r4k_clockevent_init(void)
{
- uint64_t mips_freq = mips_hpt_frequency;
unsigned int cpu = smp_processor_id();
struct clock_event_device *cd;
unsigned int irq;
@@ -188,9 +187,9 @@ int __cpuinit r4k_clockevent_init(void)
cd->name = "MIPS";
cd->features = CLOCK_EVT_FEAT_ONESHOT;
+ clockevent_set_clock(cd, mips_hpt_frequency);
+
/* Calculate the min / max delta */
- cd->mult = div_sc((unsigned long) mips_freq, NSEC_PER_SEC, 32);
- cd->shift = 32;
cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd);
cd->min_delta_ns = clockevent_delta2ns(0x300, cd);
--
1.6.6.1
