[CPUFREQ] sc520_freq.c: ioremap balanced with iounmap

ioremap must be balanced by an iounmap and failing to do so can result
in a memory leak.

Tested (compilation only):
- using allmodconfig
- making sure the files are compiling without any warning/error due to
new changes

Signed-off-by: Amol Lad <amol@verismonetworks.com>
Signed-off-by: Dave Jones <davej@redhat.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/arch/i386/kernel/cpu/cpufreq/sc520_freq.c b/arch/i386/kernel/cpu/cpufreq/sc520_freq.c
index ef457d50f4ac..b8fb4b521c62 100644
--- a/arch/i386/kernel/cpu/cpufreq/sc520_freq.c
+++ b/arch/i386/kernel/cpu/cpufreq/sc520_freq.c
@@ -153,6 +153,7 @@ static struct cpufreq_driver sc520_freq_driver = {
 static int __init sc520_freq_init(void)
 {
         struct cpuinfo_x86 *c = cpu_data;
+        int err;
 
         /* Test if we have the right hardware */
         if(c->x86_vendor != X86_VENDOR_AMD ||
@@ -166,7 +167,11 @@ static int __init sc520_freq_init(void)
                 return -ENOMEM;
         }
 
-        return cpufreq_register_driver(&sc520_freq_driver);
+        err = cpufreq_register_driver(&sc520_freq_driver);
+        if (err)
+                iounmap(cpuctl);
+
+        return err;
 }