[PATCH] w1: ds2490: drop redundant device reference

[Krzysztof Kozlowski <krzk@kernel.org>]

From: Johan Hovold <johan@kernel.org>

Driver core holds a reference to the USB interface and its parent USB
device while the interface is bound to a driver and there is no need to
take additional references unless the structures are needed after
disconnect.

Drop the redundant device reference to reduce cargo culting, make it
easier to spot drivers where an extra reference is needed, and reduce
the risk of memory leaks when drivers fail to release it.

Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260305111613.18546-1-johan@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---

Hi Greg,

I have only one patch in w1 drivers queue. It was sitting in linux-next
for three weeks, but I will drop it now from for-next branch, to avoid
duplicated patches warning from Mark.

BR,
Krzysztof

 drivers/w1/masters/ds2490.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/w1/masters/ds2490.c b/drivers/w1/masters/ds2490.c
index 35e75d07ef5d..aa1f57f74397 100644
--- a/drivers/w1/masters/ds2490.c
+++ b/drivers/w1/masters/ds2490.c
@@ -1022,11 +1022,8 @@ static int ds_probe(struct usb_interface *intf,
 	if (!dev)
 		return -ENOMEM;
 
-	dev->udev = usb_get_dev(udev);
-	if (!dev->udev) {
-		err = -ENOMEM;
-		goto err_out_free;
-	}
+	dev->udev = udev;
+
 	memset(dev->ep, 0, sizeof(dev->ep));
 
 	usb_set_intfdata(intf, dev);
@@ -1085,9 +1082,8 @@ static int ds_probe(struct usb_interface *intf,
 
 err_out_clear:
 	usb_set_intfdata(intf, NULL);
-	usb_put_dev(dev->udev);
-err_out_free:
 	kfree(dev);
+
 	return err;
 }
 
@@ -1107,7 +1103,6 @@ static void ds_disconnect(struct usb_interface *intf)
 
 	usb_set_intfdata(intf, NULL);
 
-	usb_put_dev(dev->udev);
 	kfree(dev);
 }
 
-- 
2.51.0