[PATCH v5 05/15] staging: gpib: cec: Handle gpib_register_driver() errors

[Nihar Chaithanya <niharchaithanya@gmail.com>]

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@gmail.com>
---
 drivers/staging/gpib/cec/cec_gpib.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/gpib/cec/cec_gpib.c b/drivers/staging/gpib/cec/cec_gpib.c
index 3dc933deb401..5e887c649ddb 100644
--- a/drivers/staging/gpib/cec/cec_gpib.c
+++ b/drivers/staging/gpib/cec/cec_gpib.c
@@ -365,12 +365,17 @@ static int __init cec_init_module(void)
 
 	result = pci_register_driver(&cec_pci_driver);
 	if (result) {
-		pr_err("cec_gpib: pci_driver_register failed!\n");
+		pr_err("cec_gpib: pci_driver_register failed: error = %d\n", result);
 		return result;
 	}
 
-	gpib_register_driver(&cec_pci_interface, THIS_MODULE);
+	result = gpib_register_driver(&cec_pci_interface, THIS_MODULE);
+	if (result) {
+		pr_err("cec_gpib: gpib_register_driver failed!\n");
+		return result;
+	}
 
+	pr_info("cec_gpib: module init is complete\n");
 	return 0;
 }
 
-- 
2.34.1