linux-kernel - [PATCH 2/3] firmware: vpd: Tie firmware kobject to device lifetime

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Message-Id: <1510779645-13052-2-git-send-email-linux@roeck-us.net>
Date:   Wed, 15 Nov 2017 13:00:44 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-kernel@...r.kernel.org, Randy Dunlap <rdunlap@...radead.org>,
        Wei-Ning Huang <wnhuang@...gle.com>,
        Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 2/3] firmware: vpd: Tie firmware kobject to device lifetime

It doesn't make sense to have /sys/firmware/vpd if the device is not
instantiated, so tie its lifetime to the device.

Fixes: 049a59db34eb ("firmware: Google VPD sysfs driver")
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/firmware/google/vpd.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/drivers/firmware/google/vpd.c b/drivers/firmware/google/vpd.c
index 84217172297b..942e358efa60 100644
--- a/drivers/firmware/google/vpd.c
+++ b/drivers/firmware/google/vpd.c
@@ -295,7 +295,17 @@ static int vpd_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	return vpd_sections_init(entry.cbmem_addr);
+	vpd_kobj = kobject_create_and_add("vpd", firmware_kobj);
+	if (!vpd_kobj)
+		return -ENOMEM;
+
+	ret = vpd_sections_init(entry.cbmem_addr);
+	if (ret) {
+		kobject_put(vpd_kobj);
+		return ret;
+	}
+
+	return 0;
 }
 
 static int vpd_remove(struct platform_device *pdev)
@@ -303,6 +313,8 @@ static int vpd_remove(struct platform_device *pdev)
 	vpd_section_destroy(&ro_vpd);
 	vpd_section_destroy(&rw_vpd);
 
+	kobject_put(vpd_kobj);
+
 	return 0;
 }
 
@@ -322,10 +334,6 @@ static int __init vpd_platform_init(void)
 	if (IS_ERR(pdev))
 		return PTR_ERR(pdev);
 
-	vpd_kobj = kobject_create_and_add("vpd", firmware_kobj);
-	if (!vpd_kobj)
-		return -ENOMEM;
-
 	platform_driver_register(&vpd_driver);
 
 	return 0;
@@ -333,7 +341,6 @@ static int __init vpd_platform_init(void)
 
 static void __exit vpd_platform_exit(void)
 {
-	kobject_put(vpd_kobj);
 }
 
 module_init(vpd_platform_init);
-- 
2.7.4