linux-kernel - [PATCH v4 05/15] staging: gpib: cec: Handle gpib_register

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Message-Id: <20241226193637.241049-6-niharchaithanya@gmail.com>
Date: Fri, 27 Dec 2024 01:06:29 +0530
From: Nihar Chaithanya <niharchaithanya@...il.com>
To: dpenkler@...il.com,
	gregkh@...uxfoundation.org
Cc: dan.carpenter@...aro.org,
	skhan@...uxfoundation.org,
	linux-staging@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Nihar Chaithanya <niharchaithanya@...il.com>
Subject: [PATCH v4 05/15] staging: gpib: cec: Handle gpib_register_driver() errors

The function gpib_register_driver() can fail and result in a
semi-registered module and does not return an error value if it
fails.

Unregister the pci registering function in case gpib_register_driver()
fails and return the error value.

Signed-off-by: Nihar Chaithanya <niharchaithanya@...il.com>
---
 drivers/staging/gpib/cec/cec_gpib.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/gpib/cec/cec_gpib.c b/drivers/staging/gpib/cec/cec_gpib.c
index 3dc933deb401..ffa366c30ac5 100644
--- a/drivers/staging/gpib/cec/cec_gpib.c
+++ b/drivers/staging/gpib/cec/cec_gpib.c
@@ -361,17 +361,17 @@ static struct pci_driver cec_pci_driver = {
 
 static int __init cec_init_module(void)
 {
-	int result;
+	int result = 0;
 
 	result = pci_register_driver(&cec_pci_driver);
-	if (result) {
-		pr_err("cec_gpib: pci_driver_register failed!\n");
+	if (result)
 		return result;
-	}
 
-	gpib_register_driver(&cec_pci_interface, THIS_MODULE);
+	result = gpib_register_driver(&cec_pci_interface, THIS_MODULE);
+	if (result)
+		pci_unregister_driver(&cec_pci_driver);
 
-	return 0;
+	return result;
 }
 
 static void cec_exit_module(void)
-- 
2.34.1