linux-kernel - [PATCH v2 2/5] cpufreq, powernow-k6: Fix incorrect comparison with max

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Message-ID: <20140428185418.28755.68864.stgit@srivatsabhat.in.ibm.com>
Date:	Tue, 29 Apr 2014 00:24:27 +0530
From:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
To:	rjw@...ysocki.net, mroos@...ux.ee, viresh.kumar@...aro.org
Cc:	cpufreq@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, srivatsa.bhat@...ux.vnet.ibm.com
Subject: [PATCH v2 2/5] cpufreq,
 powernow-k6: Fix incorrect comparison with max_multipler

The value of 'max_multiplier' is meant to be used for comparison with
clock_ratio[index].driver_data, not the index itself! Fix the code in
powernow_k6_cpu_exit() that has this bug.

Also, while at it, make the for-loop condition look for CPUFREQ_TABLE_END,
instead of hard-coding the loop count to 8.

Reported-by: Viresh Kumar <viresh.kumar@...aro.org>
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@...ux.vnet.ibm.com>
Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
---

 drivers/cpufreq/powernow-k6.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/powernow-k6.c b/drivers/cpufreq/powernow-k6.c
index 49f120e..695a68c 100644
--- a/drivers/cpufreq/powernow-k6.c
+++ b/drivers/cpufreq/powernow-k6.c
@@ -227,8 +227,9 @@ have_busfreq:
 static int powernow_k6_cpu_exit(struct cpufreq_policy *policy)
 {
 	unsigned int i;
-	for (i = 0; i < 8; i++) {
-		if (i == max_multiplier)
+
+	for (i = 0; (clock_ratio[i].frequency != CPUFREQ_TABLE_END); i++) {
+		if (clock_ratio[i].driver_data == max_multiplier)
 			powernow_k6_target(policy, i);
 	}
 	return 0;

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