Re: [PATCH v2] wifi: rt2x00usb: fix devres lifetime

[Greg KH <gregkh@linuxfoundation.org>]

On Fri, Mar 27, 2026 at 12:32:19PM +0100, Johan Hovold wrote:
> USB drivers bind to USB interfaces and any device managed resources
> should have their lifetime tied to the interface rather than parent USB
> device. This avoids issues like memory leaks when drivers are unbound
> without their devices being physically disconnected (e.g. on probe
> deferral or configuration changes).
> 
> Fix the USB anchor lifetime so that it is released on driver unbind.
> 
> Fixes: 8b4c0009313f ("rt2x00usb: Use usb anchor to manage URB")
> Cc: stable@vger.kernel.org	# 4.7
> Cc: Vishal Thanki <vishalthanki@gmail.com>
> Signed-off-by: Johan Hovold <johan@kernel.org>
> ---
>  drivers/net/wireless/ralink/rt2x00/rt2x00usb.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
> index 83d00b6baf64..174d89b0b1d7 100644
> --- a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
> +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
> @@ -826,7 +826,7 @@ int rt2x00usb_probe(struct usb_interface *usb_intf,
>  	if (retval)
>  		goto exit_free_device;
>  
> -	rt2x00dev->anchor = devm_kmalloc(&usb_dev->dev,
> +	rt2x00dev->anchor = devm_kmalloc(&usb_intf->dev,
>  					sizeof(struct usb_anchor),
>  					GFP_KERNEL);
>  	if (!rt2x00dev->anchor) {
> -- 
> 2.52.0
> 
> 

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>