The usb_register() function can fail and returns an error value which
is not returned. The function gpib_register_driver() can also fail
which can result in semi-registered module.
In case gpib_register_driver() fails unregister the previous usb driver
registering function. Return the error value if gpib_register_driver()
or usb_register() functions fail.
Signed-off-by: Nihar Chaithanya <niharchaithanya@xxxxxxxxx>
---
.../staging/gpib/agilent_82357a/agilent_82357a.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/gpib/agilent_82357a/agilent_82357a.c b/drivers/staging/gpib/agilent_82357a/agilent_82357a.c
index bf05fb4a736b..60311ce8d164 100644
--- a/drivers/staging/gpib/agilent_82357a/agilent_82357a.c
+++ b/drivers/staging/gpib/agilent_82357a/agilent_82357a.c
@@ -1691,14 +1691,21 @@ static struct usb_driver agilent_82357a_bus_driver = {
static int __init agilent_82357a_init_module(void)
{
int i;
+ int ret = 0;
pr_info("agilent_82357a_gpib driver loading");
for (i = 0; i < MAX_NUM_82357A_INTERFACES; ++i)
agilent_82357a_driver_interfaces[i] = NULL;
- usb_register(&agilent_82357a_bus_driver);
- gpib_register_driver(&agilent_82357a_gpib_interface, THIS_MODULE);
- return 0;
+ ret = usb_register(&agilent_82357a_bus_driver);
+ if (ret)
+ return ret;
+
+ ret = gpib_register_driver(&agilent_82357a_gpib_interface, THIS_MODULE);
+ if (ret)
+ usb_deregister(&agilent_82357a_bus_driver);
+
+ return ret;
}
static void __exit agilent_82357a_exit_module(void)
--
2.34.1
