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: 0fae198 ("HSI: omap_ssi: built omap_ssi and omap_ssi_port into one module")
Signed-off-by: Yuan Can <[email protected]>
Signed-off-by: Sebastian Reichel <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>

drivers/hsi/controllers/omap_ssi_core.c

@@ -669,7 +669,13 @@ 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);