[PATCH] cpufreq: sparc: Don't allocate cpufreq_driver dynamically

[Viresh Kumar]

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@xxxxxx>
Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
---
Looks like I wrote this back in April and forgot to send it :(

 drivers/cpufreq/sparc-us2e-cpufreq.c | 58 ++++++++--------------------
 drivers/cpufreq/sparc-us3-cpufreq.c  | 58 ++++++++--------------------
 2 files changed, 34 insertions(+), 82 deletions(-)

diff --git a/drivers/cpufreq/sparc-us2e-cpufreq.c b/drivers/cpufreq/sparc-us2e-cpufreq.c
index 92acbb25abb3..d3510cfdb3eb 100644
--- a/drivers/cpufreq/sparc-us2e-cpufreq.c
+++ b/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@xxxxxxxxxx>");
diff --git a/drivers/cpufreq/sparc-us3-cpufreq.c b/drivers/cpufreq/sparc-us3-cpufreq.c
index e41b35b16afd..91d1ed558136 100644
--- a/drivers/cpufreq/sparc-us3-cpufreq.c
+++ b/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@xxxxxxxxxx>");
-- 
2.31.1.272.g89b43f80a514