linux-kernel - [PATCH] mfd: sm501: Add check for platform_driver

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Message-Id: <20220913091112.1739138-1-jiasheng@iscas.ac.cn>
Date:   Tue, 13 Sep 2022 17:11:12 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     lee@...nel.org
Cc:     linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] mfd: sm501: Add check for platform_driver_register

As platform_driver_register() can return error numbers,
it should be better to check platform_driver_register()
and deal with the exception.

Fixes: b6d6454fdb66 ("[PATCH] mfd: SM501 core driver")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/mfd/sm501.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index bc0a2c38653e..3ac4508a6742 100644
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -1720,7 +1720,12 @@ static struct platform_driver sm501_plat_driver = {
 
 static int __init sm501_base_init(void)
 {
-	platform_driver_register(&sm501_plat_driver);
+	int ret;
+
+	ret = platform_driver_register(&sm501_plat_driver);
+	if (ret < 0)
+		return ret;
+
 	return pci_register_driver(&sm501_pci_driver);
 }
 
-- 
2.25.1