USB: cytherm: drop redundant device reference

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/20260305111511.18386-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/misc/cytherm.c b/drivers/usb/misc/cytherm.c
index 2bf082474e9dbe60e5fc4fbccbaaa38abefd377a..b183df9826bc6ca75b7e66b4be56899d5b46b392 100644 (file)
--- a/drivers/usb/misc/cytherm.c
+++ b/drivers/usb/misc/cytherm.c
@@ -311,7 +311,7 @@ static int cytherm_probe(struct usb_interface *interface,
        if (!dev)
                goto error_mem;
 
-       dev->udev = usb_get_dev(udev);
+       dev->udev = udev;
 
        usb_set_intfdata(interface, dev);
 
@@ -334,8 +334,6 @@ static void cytherm_disconnect(struct usb_interface *interface)
        /* first remove the files, then NULL the pointer */
        usb_set_intfdata(interface, NULL);
 
-       usb_put_dev(dev->udev);
-
        kfree(dev);
 
        dev_info(&interface->dev, "Cypress thermometer now disconnected\n");