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Subject[PATCH V2] x86/Hyper-V: Fix hv sched clock function return wrong time unit
Date
From: Yubo Xie <yuboxie@microsoft.com>

sched clock callback should return time with nano second as unit
but current hv callback returns time with 100ns. Fix it.

Cc: stable@vger.kernel.org
Signed-off-by: Yubo Xie <yuboxie@microsoft.com>
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Fixes: bd00cd52d5be ("clocksource/drivers/hyperv: Add Hyper-V specific sched clock function")
---
Change since v1:
Update fix commit number in change log.
---
drivers/clocksource/hyperv_timer.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c
index 9d808d595ca8..662ed978fa24 100644
--- a/drivers/clocksource/hyperv_timer.c
+++ b/drivers/clocksource/hyperv_timer.c
@@ -343,7 +343,8 @@ static u64 notrace read_hv_clock_tsc_cs(struct clocksource *arg)

static u64 read_hv_sched_clock_tsc(void)
{
- return read_hv_clock_tsc() - hv_sched_clock_offset;
+ return (read_hv_clock_tsc() - hv_sched_clock_offset)
+ * (NSEC_PER_SEC / HV_CLOCK_HZ);
}

static void suspend_hv_clock_tsc(struct clocksource *arg)
@@ -398,7 +399,8 @@ static u64 notrace read_hv_clock_msr_cs(struct clocksource *arg)

static u64 read_hv_sched_clock_msr(void)
{
- return read_hv_clock_msr() - hv_sched_clock_offset;
+ return (read_hv_clock_msr() - hv_sched_clock_offset)
+ * (NSEC_PER_SEC / HV_CLOCK_HZ);
}

static struct clocksource hyperv_cs_msr = {
--
2.14.5
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