linux-kernel - [PATCH v3 5/7] staging: pi433: Remove duplicated code using the "goto" error recovery scheme.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Fri,  5 Apr 2024 10:39:58 +0300
From: Shahar Avidar <ikobh7@...il.com>
To: gregkh@...uxfoundation.org,
	hverkuil-cisco@...all.nl,
	andriy.shevchenko@...ux.intel.com,
	robh@...nel.org,
	felixkimbu1@...il.com
Cc: linux-staging@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 5/7] staging: pi433: Remove duplicated code using the "goto" error recovery scheme.

pi433_init had "unregister_chrdev" called twice.
Remove it using goto statements.

Signed-off-by: Shahar Avidar <ikobh7@...il.com>
---
v2->v1:
Followed by Dan Carpenter's <dan.carpenter@...aro.org> comments:
        - Remove empty "fail" goto tag.
        - Reorder pi433 init & exit calls so they have reverse order.
        - Add "unreg_spi_drv" goto tag.
        - Check "debugfs_create_dir" return value.
        - Update "if" statments for consistency.
v2->v3:
        - Undo pi433 init & exit calls reordering. Reorder exit calls in
          a seperate patch.
        - Remove "unreg_spi_drv" tag.
        - Undo return value checking for "debugfs_create_dir".
        - Undo "if" statements update.

 drivers/staging/pi433/pi433_if.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/staging/pi433/pi433_if.c b/drivers/staging/pi433/pi433_if.c
index 62ce75b07bf0..b01ee145ff3c 100644
--- a/drivers/staging/pi433/pi433_if.c
+++ b/drivers/staging/pi433/pi433_if.c
@@ -1403,21 +1403,21 @@ static int __init pi433_init(void)
 		return status;
 
 	status = class_register(&pi433_class);
-	if (status) {
-		unregister_chrdev(MAJOR(pi433_devt),
-				  pi433_spi_driver.driver.name);
-		return status;
-	}
+	if (status)
+		goto unreg_chrdev;
 
 	root_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 
 	status = spi_register_driver(&pi433_spi_driver);
-	if (status < 0) {
-		class_unregister(&pi433_class);
-		unregister_chrdev(MAJOR(pi433_devt),
-				  pi433_spi_driver.driver.name);
-	}
+	if (status < 0)
+		goto unreg_class_and_remove_dbfs;
 
+	return 0;
+
+unreg_class_and_remove_dbfs:
+	class_unregister(&pi433_class);
+unreg_chrdev:
+	unregister_chrdev(MAJOR(pi433_devt), pi433_spi_driver.driver.name);
 	return status;
 }
 
-- 
2.34.1