[PATCH v2] isa: refactor code to remove nested blocks

[Syed Nayyar Waris <syednwaris@gmail.com>]

Remove nested blocks in isa_bus_init(). This will make the module
easy-to-understand and make the code clearer.
Previous discussion regarding this change can be found
at below link:
https://lore.kernel.org/all/20260504063518.515620-1-wbg@kernel.org/

Acked-by: William Breathitt Gray <wbg@kernel.org>
Suggested-by: William Breathitt Gray <wbg@kernel.org>
Signed-off-by: Syed Nayyar Waris <syednwaris@gmail.com>
---
Changes in v2:
 - Make the patch description more comprehensive and thorough 
   in its explanation
---
 drivers/base/isa.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/base/isa.c b/drivers/base/isa.c
index 5887e4211f80..4e9f68080f39 100644
--- a/drivers/base/isa.c
+++ b/drivers/base/isa.c
@@ -166,14 +166,16 @@ static int __init isa_bus_init(void)
 	int error;
 
 	error = bus_register(&isa_bus_type);
-	if (!error) {
-		isa_bus = root_device_register("isa");
-		if (IS_ERR(isa_bus)) {
-			error = PTR_ERR(isa_bus);
-			bus_unregister(&isa_bus_type);
-		}
+	if (error)
+		return error;
+
+	isa_bus = root_device_register("isa");
+	if (IS_ERR(isa_bus)) {
+		bus_unregister(&isa_bus_type);
+		return PTR_ERR(isa_bus);
 	}
-	return error;
+
+	return 0;
 }
 
 postcore_initcall(isa_bus_init);
-- 
2.25.1