cpufreq: sparc: Don't allocate cpufreq_driver dynamically

There is no point allocating the cpufreq driver dynamically and add so
much complexity in the driver.

Do what is done for other cpufreq drivers and statically allocate the
cpufreq driver.

Reported-by: Markus Elfring <Markus.Elfring@web.de>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>

Author: vireshk

drivers/cpufreq/sparc-us2e-cpufreq.c

@@ -20,8 +20,6 @@
 #include <asm/asi.h>
 #include <asm/timer.h>
 
-static struct cpufreq_driver *cpufreq_us2e_driver;
-
 struct us2e_freq_percpu_info {
 	struct cpufreq_frequency_table table[6];
 };
@@ -300,12 +298,19 @@ static int __init us2e_freq_cpu_init(struct cpufreq_policy *policy)
 
 static int us2e_freq_cpu_exit(struct cpufreq_policy *policy)
 {
-	if (cpufreq_us2e_driver)
-		us2e_freq_target(policy, 0);
-
+	us2e_freq_target(policy, 0);
 	return 0;
 }
 
+static struct cpufreq_driver cpufreq_us2e_driver = {
+	.name = "UltraSPARC-IIe",
+	.init = us2e_freq_cpu_init,
+	.verify = cpufreq_generic_frequency_table_verify,
+	.target_index = us2e_freq_target,
+	.get = us2e_freq_get,
+	.exit = us2e_freq_cpu_exit,
+};
+
 static int __init us2e_freq_init(void)
 {
 	unsigned long manuf, impl, ver;
@@ -319,39 +324,15 @@ static int __init us2e_freq_init(void)
 	impl  = ((ver >> 32) & 0xffff);
 
 	if (manuf == 0x17 && impl == 0x13) {
-		struct cpufreq_driver *driver;
-
-		ret = -ENOMEM;
-		driver = kzalloc(sizeof(*driver), GFP_KERNEL);
-		if (!driver)
-			goto err_out;
-
-		us2e_freq_table = kzalloc((NR_CPUS * sizeof(*us2e_freq_table)),
-			GFP_KERNEL);
+		us2e_freq_table = kzalloc(NR_CPUS * sizeof(*us2e_freq_table),
+					  GFP_KERNEL);
 		if (!us2e_freq_table)
-			goto err_out;
-
-		driver->init = us2e_freq_cpu_init;
-		driver->verify = cpufreq_generic_frequency_table_verify;
-		driver->target_index = us2e_freq_target;
-		driver->get = us2e_freq_get;
-		driver->exit = us2e_freq_cpu_exit;
-		strcpy(driver->name, "UltraSPARC-IIe");
+			return -ENOMEM;
 
-		cpufreq_us2e_driver = driver;
-		ret = cpufreq_register_driver(driver);
+		ret = cpufreq_register_driver(&cpufreq_us2e_driver);
 		if (ret)
-			goto err_out;
+			kfree(us2e_freq_table);
 
-		return 0;
-
-err_out:
-		if (driver) {
-			kfree(driver);
-			cpufreq_us2e_driver = NULL;
-		}
-		kfree(us2e_freq_table);
-		us2e_freq_table = NULL;
 		return ret;
 	}
 
@@ -360,13 +341,8 @@ static int __init us2e_freq_init(void)
 
 static void __exit us2e_freq_exit(void)
 {
-	if (cpufreq_us2e_driver) {
-		cpufreq_unregister_driver(cpufreq_us2e_driver);
-		kfree(cpufreq_us2e_driver);
-		cpufreq_us2e_driver = NULL;
-		kfree(us2e_freq_table);
-		us2e_freq_table = NULL;
-	}
+	cpufreq_unregister_driver(&cpufreq_us2e_driver);
+	kfree(us2e_freq_table);
 }
 
 MODULE_AUTHOR("David S. Miller <davem@redhat.com>");

drivers/cpufreq/sparc-us3-cpufreq.c

@@ -19,8 +19,6 @@
 #include <asm/head.h>
 #include <asm/timer.h>
 
-static struct cpufreq_driver *cpufreq_us3_driver;
-
 struct us3_freq_percpu_info {
 	struct cpufreq_frequency_table table[4];
 };
@@ -144,12 +142,19 @@ static int __init us3_freq_cpu_init(struct cpufreq_policy *policy)
 
 static int us3_freq_cpu_exit(struct cpufreq_policy *policy)
 {
-	if (cpufreq_us3_driver)
-		us3_freq_target(policy, 0);
-
+	us3_freq_target(policy, 0);
 	return 0;
 }
 
+static struct cpufreq_driver cpufreq_us3_driver = {
+	.name = "UltraSPARC-III",
+	.init = us3_freq_cpu_init,
+	.verify = cpufreq_generic_frequency_table_verify,
+	.target_index = us3_freq_target,
+	.get = us3_freq_get,
+	.exit = us3_freq_cpu_exit,
+};
+
 static int __init us3_freq_init(void)
 {
 	unsigned long manuf, impl, ver;
@@ -167,39 +172,15 @@ static int __init us3_freq_init(void)
 	     impl == CHEETAH_PLUS_IMPL ||
 	     impl == JAGUAR_IMPL ||
 	     impl == PANTHER_IMPL)) {
-		struct cpufreq_driver *driver;
-
-		ret = -ENOMEM;
-		driver = kzalloc(sizeof(*driver), GFP_KERNEL);
-		if (!driver)
-			goto err_out;
-
-		us3_freq_table = kzalloc((NR_CPUS * sizeof(*us3_freq_table)),
-			GFP_KERNEL);
+		us3_freq_table = kzalloc(NR_CPUS * sizeof(*us3_freq_table),
+					 GFP_KERNEL);
 		if (!us3_freq_table)
-			goto err_out;
-
-		driver->init = us3_freq_cpu_init;
-		driver->verify = cpufreq_generic_frequency_table_verify;
-		driver->target_index = us3_freq_target;
-		driver->get = us3_freq_get;
-		driver->exit = us3_freq_cpu_exit;
-		strcpy(driver->name, "UltraSPARC-III");
+			return -ENOMEM;
 
-		cpufreq_us3_driver = driver;
-		ret = cpufreq_register_driver(driver);
+		ret = cpufreq_register_driver(&cpufreq_us3_driver);
 		if (ret)
-			goto err_out;
+			kfree(us3_freq_table);
 
-		return 0;
-
-err_out:
-		if (driver) {
-			kfree(driver);
-			cpufreq_us3_driver = NULL;
-		}
-		kfree(us3_freq_table);
-		us3_freq_table = NULL;
 		return ret;
 	}
 
@@ -208,13 +189,8 @@ static int __init us3_freq_init(void)
 
 static void __exit us3_freq_exit(void)
 {
-	if (cpufreq_us3_driver) {
-		cpufreq_unregister_driver(cpufreq_us3_driver);
-		kfree(cpufreq_us3_driver);
-		cpufreq_us3_driver = NULL;
-		kfree(us3_freq_table);
-		us3_freq_table = NULL;
-	}
+	cpufreq_unregister_driver(&cpufreq_us3_driver);
+	kfree(us3_freq_table);
 }
 
 MODULE_AUTHOR("David S. Miller <davem@redhat.com>");