linux-kernel - [PATCH v2] cpufreq: powernv: Fix the frequency read by /proc/cpuinfo

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Date:   Fri, 13 Oct 2017 10:06:41 +0530
From:   Shriya <shriyak@...ux.vnet.ibm.com>
To:     mpe@...erman.id.au, mikey@...ling.org
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        ego@...ux.vnet.ibm.com, shilpa.bhat@...ux.vnet.ibm.com,
        Shriya <shriyak@...ux.vnet.ibm.com>, stable@...r.kernel.org
Subject: [PATCH v2] cpufreq: powernv: Fix the frequency read by /proc/cpuinfo

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 : commit fb5153d05a7d ("powerpc: powernv: Implement
ppc_md.get_proc_freq()")
Cc: stable@...r.kernel.org

Signed-off-by: Shriya <shriyak@...ux.vnet.ibm.com>
---
 arch/powerpc/platforms/powernv/setup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
index cf52d53..58e7ae5 100644
--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c
@@ -312,7 +312,7 @@ static unsigned long pnv_get_proc_freq(unsigned int cpu)
 {
 	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,
-- 
1.9.1