linux-kernel - [PATCH v4 01/15] staging: gpib: Modify gpib_register

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Message-Id: <20241226193637.241049-2-niharchaithanya@gmail.com>
Date: Fri, 27 Dec 2024 01:06:25 +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 01/15] staging: gpib: Modify gpib_register_driver() to return error if it fails

The function gpib_register_driver() can fail if kmalloc() fails,
but it doesn't return any error if that happens.

Modify the function to return error i.e int. Return the appropriate 
error code if it fails.

Signed-off-by: Nihar Chaithanya <niharchaithanya@...il.com>
---
 drivers/staging/gpib/common/gpib_os.c | 7 ++++---
 drivers/staging/gpib/include/gpibP.h  | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/gpib/common/gpib_os.c b/drivers/staging/gpib/common/gpib_os.c
index 405237d8cb47..07795df3b721 100644
--- a/drivers/staging/gpib/common/gpib_os.c
+++ b/drivers/staging/gpib/common/gpib_os.c
@@ -2094,18 +2094,19 @@ void init_gpib_descriptor(gpib_descriptor_t *desc)
 	atomic_set(&desc->io_in_progress, 0);
 }
 
-void gpib_register_driver(gpib_interface_t *interface, struct module *provider_module)
+int gpib_register_driver(gpib_interface_t *interface, struct module *provider_module)
 {
 	struct gpib_interface_list_struct *entry;
 
 	entry = kmalloc(sizeof(*entry), GFP_KERNEL);
 	if (!entry)
-		return;
+		return -ENOMEM;
 
 	entry->interface = interface;
 	entry->module = provider_module;
 	list_add(&entry->list, &registered_drivers);
-	pr_info("gpib: registered %s interface\n", interface->name);
+
+	return 0;
 }
 EXPORT_SYMBOL(gpib_register_driver);
 
diff --git a/drivers/staging/gpib/include/gpibP.h b/drivers/staging/gpib/include/gpibP.h
index 5fc42b645ab7..d0cd42c1a0ad 100644
--- a/drivers/staging/gpib/include/gpibP.h
+++ b/drivers/staging/gpib/include/gpibP.h
@@ -17,7 +17,7 @@
 #include <linux/fs.h>
 #include <linux/interrupt.h>
 
-void gpib_register_driver(gpib_interface_t *interface, struct module *mod);
+int gpib_register_driver(gpib_interface_t *interface, struct module *mod);
 void gpib_unregister_driver(gpib_interface_t *interface);
 struct pci_dev *gpib_pci_get_device(const gpib_board_config_t *config, unsigned int vendor_id,
 				    unsigned int device_id, struct pci_dev *from);
-- 
2.34.1