linux-kernel - [PATCH] thermal: cpu_cooling: Iterate over all CPUs in clip

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Message-Id: <1435723994-3882-1-git-send-email-pi-cheng.chen@linaro.org>
Date:	Wed,  1 Jul 2015 12:13:14 +0800
From:	Pi-Cheng Chen <pi-cheng.chen@...aro.org>
To:	Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <edubezval@...il.com>
Cc:	linux-pm@...r.kernel.org, linaro-kernel@...ts.linaro.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] thermal: cpu_cooling: Iterate over all CPUs in clip_cpu mask to get frequency table

Sorry for the mistake I made when cherry-picking the patch. Fix and resend
again.

__cpufreq_cooling_register() might fail if some CPU other than first one in
clip_cpu mask is present earlier e.g. CPU hotplug. Iterate all CPUs in the mask
to handle this case.

Signed-off-by: Pi-Cheng Chen <pi-cheng.chen@...aro.org>
---
 drivers/thermal/cpu_cooling.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
index 6509c61..5e90eb6 100644
--- a/drivers/thermal/cpu_cooling.c
+++ b/drivers/thermal/cpu_cooling.c
@@ -776,9 +776,14 @@ __cpufreq_cooling_register(struct device_node *np,
 	char dev_name[THERMAL_NAME_LENGTH];
 	struct cpufreq_frequency_table *pos, *table;
 	unsigned int freq, i, num_cpus;
-	int ret;
+	int ret, cpu;
+
+	for_each_cpu(cpu, clip_cpus) {
+		table = cpufreq_frequency_get_table(cpu);
+		if (table)
+			break;
+	}
 
-	table = cpufreq_frequency_get_table(cpumask_first(clip_cpus));
 	if (!table) {
 		pr_debug("%s: CPUFreq table not found\n", __func__);
 		return ERR_PTR(-EPROBE_DEFER);
-- 
1.9.1

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