linux-kernel - [PATCH 6/6] powernow-k8: Cleanup init function

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Message-Id: <1358677470-17394-7-git-send-email-bp@alien8.de>
Date:	Sun, 20 Jan 2013 11:24:30 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	André Przywara <andre@...rep.de>,
	Leonid Isaev <lisaev@...il.iu.edu>,
	Tom Gundersen <teg@...m.no>, cpufreq@...r.kernel.org,
	linux-acpi@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...e.de>
Subject: [PATCH 6/6] powernow-k8: Cleanup init function

From: Borislav Petkov <bp@...e.de>

Make it hotplug-safe and cleanup formatting.

Signed-off-by: Borislav Petkov <bp@...e.de>
---
 drivers/cpufreq/powernow-k8.c | 25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c
index 0234d0c6d68c..d13a13678b5f 100644
--- a/drivers/cpufreq/powernow-k8.c
+++ b/drivers/cpufreq/powernow-k8.c
@@ -1271,7 +1271,7 @@ static void __request_acpi_cpufreq(void)
 static int __cpuinit powernowk8_init(void)
 {
 	unsigned int i, supported_cpus = 0;
-	int rv;
+	int ret;
 
 	if (static_cpu_has(X86_FEATURE_HW_PSTATE)) {
 		__request_acpi_cpufreq();
@@ -1281,24 +1281,27 @@ static int __cpuinit powernowk8_init(void)
 	if (!x86_match_cpu(powernow_k8_ids))
 		return -ENODEV;
 
+	get_online_cpus();
 	for_each_online_cpu(i) {
-		int rc;
-		smp_call_function_single(i, check_supported_cpu, &rc, 1);
-		if (rc == 0)
+		smp_call_function_single(i, check_supported_cpu, &ret, 1);
+		if (!ret)
 			supported_cpus++;
 	}
 
-	if (supported_cpus != num_online_cpus())
+	if (supported_cpus != num_online_cpus()) {
+		put_online_cpus();
 		return -ENODEV;
+	}
+	put_online_cpus();
 
-	rv = cpufreq_register_driver(&cpufreq_amd64_driver);
+	ret = cpufreq_register_driver(&cpufreq_amd64_driver);
+	if (ret)
+		return ret;
 
-	if (!rv)
-		pr_info(PFX "Found %d %s (%d cpu cores) (" VERSION ")\n",
-			num_online_nodes(), boot_cpu_data.x86_model_id,
-			supported_cpus);
+	pr_info(PFX "Found %d %s (%d cpu cores) (" VERSION ")\n",
+		num_online_nodes(), boot_cpu_data.x86_model_id, supported_cpus);
 
-	return rv;
+	return ret;
 }
 
 /* driver entry point for term */
-- 
1.8.1.rc3

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