[PATCH 4.4 075/115] powerpc/powernv/cpufreq: Fix the frequency read by /proc/cpuinfo

Greg Kroah-Hartman
2017-12-18T15:55:37Z

From: Shriya <shriyak@linux.vnet.ibm.com>

[ Upstream commit cd77b5ce208c153260ed7882d8910f2395bfaabd ]

The call to /proc/cpuinfo in turn calls cpufreq_quick_get() which
returns the last frequency requested by the kernel, but may not
reflect the actual frequency the processor is running at. This patch
makes a call to cpufreq_get() instead which returns the current
frequency reported by the hardware.

Fixes: fb5153d05a7d ("powerpc: powernv: Implement ppc_md.get_proc_freq()")
Signed-off-by: Shriya <shriyak@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/powerpc/platforms/powernv/setup.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c
@@ -295,7 +295,7 @@ static unsigned long pnv_get_proc_freq(u
{
unsigned long ret_freq;

- ret_freq = cpufreq_quick_get(cpu) * 1000ul;
+ ret_freq = cpufreq_get(cpu) * 1000ul;

/*
* If the backend cpufreq driver does not exist,