[PATCH] wifi: ath9k: drop redundant device reference

[PATCH] wifi: ath9k: drop redundant device reference

[Johan Hovold]

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>
---
 drivers/net/wireless/ath/ath9k/hif_usb.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c
index 8533b88974b2..821909b81ea9 100644
--- a/drivers/net/wireless/ath/ath9k/hif_usb.c
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.c
@@ -1382,8 +1382,6 @@ static int ath9k_hif_usb_probe(struct usb_interface *interface,
 		goto err_alloc;
 	}
 
-	usb_get_dev(udev);
-
 	hif_dev->udev = udev;
 	hif_dev->interface = interface;
 	hif_dev->usb_device_id = id;
@@ -1403,7 +1401,6 @@ static int ath9k_hif_usb_probe(struct usb_interface *interface,
 err_fw_req:
 	usb_set_intfdata(interface, NULL);
 	kfree(hif_dev);
-	usb_put_dev(udev);
 err_alloc:
 	return ret;
 }
@@ -1451,7 +1448,6 @@ static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
 
 	kfree(hif_dev);
 	dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
-	usb_put_dev(udev);
 }
 
 #ifdef CONFIG_PM
-- 
2.52.0