mfd: sm501: Add check for platform_driver_register()

[ Upstream commit f82e0a60c912e447e15403f1d1a1ce67c83176ab ]

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

Fixes: c9090c5e75ee ("[PATCH] mfd: SM501 core driver")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20220913091112.1739138-1-jiasheng@iscas.ac.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index bbcde58e2a11eb8e115081d001ce2cec2ca99f51..aab8d8910319d0e102181e003e8dfd32abbfb478 100644 (file)
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -1733,7 +1733,12 @@ 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);
 }