HSI: omap_ssi_core: Fix error handling in ssi_init()

[ Upstream commit 3ffa9f713c39a213a08d9ff13ab983a8aa5d8b5d ]

The ssi_init() returns the platform_driver_register() directly without
checking its return value, if platform_driver_register() failed, the
ssi_pdriver is not unregistered.
Fix by unregister ssi_pdriver when the last platform_driver_register()
failed.

Fixes: 149a91e7d758 ("HSI: omap_ssi: built omap_ssi and omap_ssi_port into one module")
Signed-off-by: Yuan Can <yuancan@huawei.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/hsi/controllers/omap_ssi_core.c b/drivers/hsi/controllers/omap_ssi_core.c
index aca80357ccaa0b74dfb6fe6d2590503041d2a903..329889bf42f9abf7862c576e107d74557542680e 100644 (file)
--- a/drivers/hsi/controllers/omap_ssi_core.c
+++ b/drivers/hsi/controllers/omap_ssi_core.c
@@ -631,7 +631,13 @@ static int __init ssi_init(void) {
        if (ret)
                return ret;
 
-       return platform_driver_register(&ssi_port_pdriver);
+       ret = platform_driver_register(&ssi_port_pdriver);
+       if (ret) {
+               platform_driver_unregister(&ssi_pdriver);
+               return ret;
+       }
+
+       return 0;
 }
 module_init(ssi_init);