linux-kernel - [PATCH 3/5] firmware: provide helpers for registering the syfs loader

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Date:   Mon, 20 Nov 2017 09:45:33 -0800
From:   "Luis R. Rodriguez" <mcgrof@...nel.org>
To:     gregkh@...uxfoundation.org
Cc:     keescook@...omium.org, mfuzzey@...keon.com,
        zohar@...ux.vnet.ibm.com, dhowells@...hat.com,
        pali.rohar@...il.com, tiwai@...e.de, arend.vanspriel@...adcom.com,
        zajec5@...il.com, nbroeking@...com, markivx@...eaurora.org,
        stephen.boyd@...aro.org, broonie@...nel.org,
        dmitry.torokhov@...il.com, dwmw2@...radead.org,
        torvalds@...ux-foundation.org, Abhay_Salunke@...l.com,
        bjorn.andersson@...aro.org, jewalt@...innovations.com,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        "Luis R. Rodriguez" <mcgrof@...nel.org>
Subject: [PATCH 3/5] firmware: provide helpers for registering the syfs loader

This makes init / exit much easier to read, and we can later
reuse this code on other errors not captured yet.

Signed-off-by: Luis R. Rodriguez <mcgrof@...nel.org>
---
 drivers/base/firmware_class.c | 29 +++++++++++++++++++++--------
 1 file changed, 21 insertions(+), 8 deletions(-)

diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index c8033c5488f9..3340a17e0499 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -687,6 +687,16 @@ static struct class firmware_class = {
 	.dev_release	= fw_dev_release,
 };
 
+static inline int register_sysfs_loader(void)
+{
+	return class_register(&firmware_class);
+}
+
+static inline void unregister_sysfs_loader(void)
+{
+	class_unregister(&firmware_class);
+}
+
 static ssize_t firmware_loading_show(struct device *dev,
 				     struct device_attribute *attr, char *buf)
 {
@@ -1124,6 +1134,15 @@ fw_load_from_user_helper(struct firmware *firmware, const char *name,
 
 static inline void kill_pending_fw_fallback_reqs(bool only_kill_custom) { }
 
+static inline int register_sysfs_loader(void)
+{
+	return 0;
+}
+
+static inline void unregister_sysfs_loader(void)
+{
+}
+
 #endif /* CONFIG_FW_LOADER_USER_HELPER */
 
 /* prepare firmware and firmware_buf structs;
@@ -1842,20 +1861,14 @@ static int __init firmware_class_init(void)
 		return ret;
 
 	register_reboot_notifier(&fw_shutdown_nb);
-#ifdef CONFIG_FW_LOADER_USER_HELPER
-	return class_register(&firmware_class);
-#else
-	return 0;
-#endif
+	return register_sysfs_loader();
 }
 
 static void __exit firmware_class_exit(void)
 {
 	unregister_fw_pm_ops();
 	unregister_reboot_notifier(&fw_shutdown_nb);
-#ifdef CONFIG_FW_LOADER_USER_HELPER
-	class_unregister(&firmware_class);
-#endif
+	unregister_sysfs_loader();
 }
 
 fs_initcall(firmware_class_init);
-- 
2.15.0