[PATCH] HID: hiddev: return -ENOMEM when kmalloc failed

The driver is using -1 instead of the -ENOMEM defined macro to
specify that a buffer allocation failed. Using the correct error
code is more intuitive.

Smatch tool warning:
drivers/hid/usbhid/hiddev.c:894 hiddev_connect() warn: returning -1
instead of -ENOMEM is sloppy

No functional change, just more standardized.

Reported-by: Abaci Robot <redacted>
Signed-off-by: Yang Li <redacted>
---
 drivers/hid/usbhid/hiddev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
index 45e0b1c..88020f3 100644
--- a/drivers/hid/usbhid/hiddev.c
+++ b/drivers/hid/usbhid/hiddev.c

@@ -891,7 +891,7 @@ int hiddev_connect(struct hid_device *hid, unsigned int force)
 	}
 
 	if (!(hiddev = kzalloc(sizeof(struct hiddev), GFP_KERNEL)))
-		return -1;
+		return -ENOMEM;
 
 	init_waitqueue_head(&hiddev->wait);
 	INIT_LIST_HEAD(&hiddev->list);

-- 
1.8.3.1

On Mon, Apr 26, 2021 at 05:35:26PM +0800, Yang Li wrote:

Please try to understand the code that you're changing based on feedback
from some tool.

All other error paths here return -1 and the return value of this
function is only compared to zero.

How is changing only one of these paths an improvement in any way?

 
 	init_waitqueue_head(&hiddev->wait);
 	INIT_LIST_HEAD(&hiddev->list);

Johan