firmware loader: fix compile warning when CONFIG_PM=n

This patch replaces the previous macro of CONFIG_PM with
CONFIG_PM_SLEEP becasue firmware cache is only used in
system sleep situations.

Also this patch fixes the below compile warning when
CONFIG_PM=n:

	drivers/base/firmware_class.c:1147: warning: 'device_cache_fw_images'
	defined but not used
	drivers/base/firmware_class.c:1212: warning:
	'device_uncache_fw_images_delay' defined but not used

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 22 insertions, 11 deletions

diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 95f6851b3010..6e210802c37b 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -96,7 +96,9 @@ struct firmware_cache {
         /* firmware_buf instance will be added into the below list */
         spinlock_t lock;
         struct list_head head;
+        int state;
 
+#ifdef CONFIG_PM_SLEEP
         /*
          * Names of firmware images which have been cached successfully
          * will be added into the below list so that device uncache
@@ -106,13 +108,12 @@ struct firmware_cache {
         spinlock_t name_lock;
         struct list_head fw_names;
 
-        int state;
-
         wait_queue_head_t wait_queue;
         int cnt;
         struct delayed_work work;
 
         struct notifier_block   pm_notify;
+#endif
 };
 
 struct firmware_buf {
@@ -622,6 +623,7 @@ static void fw_set_page_data(struct firmware_buf *buf, struct firmware *fw)
                  (unsigned int)buf->size);
 }
 
+#ifdef CONFIG_PM_SLEEP
 static void fw_name_devm_release(struct device *dev, void *res)
 {
         struct fw_name_devm *fwn = res;
@@ -670,6 +672,12 @@ static int fw_add_devm_name(struct device *dev, const char *name)
 
         return 0;
 }
+#else
+static int fw_add_devm_name(struct device *dev, const char *name)
+{
+        return 0;
+}
+#endif
 
 static void _request_firmware_cleanup(const struct firmware **firmware_p)
 {
@@ -1046,6 +1054,7 @@ int uncache_firmware(const char *fw_name)
         return -EINVAL;
 }
 
+#ifdef CONFIG_PM_SLEEP
 static struct fw_cache_entry *alloc_fw_cache_entry(const char *name)
 {
         struct fw_cache_entry *fce;
@@ -1258,7 +1267,6 @@ static void device_uncache_fw_images_delay(unsigned long delay)
                         msecs_to_jiffies(delay));
 }
 
-#ifdef CONFIG_PM
 static int fw_pm_notify(struct notifier_block *notify_block,
                         unsigned long mode, void *unused)
 {
@@ -1285,13 +1293,6 @@ static int fw_pm_notify(struct notifier_block *notify_block,
 
         return 0;
 }
-#else
-static int fw_pm_notify(struct notifier_block *notify_block,
-                        unsigned long mode, void *unused)
-{
-        return 0;
-}
-#endif
 
 /* stop caching firmware once syscore_suspend is reached */
 static int fw_suspend(void)
@@ -1303,16 +1304,23 @@ static int fw_suspend(void)
 static struct syscore_ops fw_syscore_ops = {
         .suspend = fw_suspend,
 };
+#else
+static int fw_cache_piggyback_on_request(const char *name)
+{
+        return 0;
+}
+#endif
 
 static void __init fw_cache_init(void)
 {
         spin_lock_init(&fw_cache.lock);
         INIT_LIST_HEAD(&fw_cache.head);
+        fw_cache.state = FW_LOADER_NO_CACHE;
 
+#ifdef CONFIG_PM_SLEEP
         spin_lock_init(&fw_cache.name_lock);
         INIT_LIST_HEAD(&fw_cache.fw_names);
         fw_cache.cnt = 0;
-        fw_cache.state = FW_LOADER_NO_CACHE;
 
         init_waitqueue_head(&fw_cache.wait_queue);
         INIT_DELAYED_WORK(&fw_cache.work,
@@ -1322,6 +1330,7 @@ static void __init fw_cache_init(void)
         register_pm_notifier(&fw_cache.pm_notify);
 
         register_syscore_ops(&fw_syscore_ops);
+#endif
 }
 
 static int __init firmware_class_init(void)
@@ -1332,8 +1341,10 @@ static int __init firmware_class_init(void)
 
 static void __exit firmware_class_exit(void)
 {
+#ifdef CONFIG_PM_SLEEP
         unregister_syscore_ops(&fw_syscore_ops);
         unregister_pm_notifier(&fw_cache.pm_notify);
+#endif
         class_unregister(&firmware_class);
 }