linux-kernel - [PATCH 3.16 059/136] powerpc/powernv/cpufreq: Fix the frequency read by /proc/cpuinfo

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Message-ID: <lsq.1518323471.366642386@decadent.org.uk>
Date:   Sun, 11 Feb 2018 04:31:11 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Michael Ellerman" <mpe@...erman.id.au>,
        "Shriya" <shriyak@...ux.vnet.ibm.com>
Subject: [PATCH 3.16 059/136] powerpc/powernv/cpufreq: Fix the frequency
 read by /proc/cpuinfo

3.16.54-rc1 review patch.  If anyone has any objections, please let me know.

------------------

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

commit cd77b5ce208c153260ed7882d8910f2395bfaabd upstream.

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@...ux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 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
@@ -309,7 +309,7 @@ unsigned long pnv_get_proc_freq(unsigned
 {
 	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,