linux-kernel - Re: [PATCH v2 1/3] usb: gadget: f_ecm: Add get

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Message-ID: <20250422221310.6azlombifaf4d6ho@synopsys.com>
Date: Tue, 22 Apr 2025 22:13:19 +0000
From: Thinh Nguyen <Thinh.Nguyen@...opsys.com>
To: Prashanth K <prashanth.k@....qualcomm.com>
CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Kees Bakker <kees@...erbout.nl>,
        William McVicker <willmcvicker@...gle.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...nel.org" <stable@...nel.org>
Subject: Re: [PATCH v2 1/3] usb: gadget: f_ecm: Add get_status callback

On Tue, Apr 22, 2025, Prashanth K wrote:
> When host sends GET_STATUS to ECM interface, handle the request
> from the function driver. Since the interface is wakeup capable,
> set the corresponding bit, and set RW bit if the function is
> already armed for wakeup by the host.
> 
> Cc: stable@...nel.org
> Fixes: 481c225c4802 ("usb: gadget: Handle function suspend feature selector")
> Signed-off-by: Prashanth K <prashanth.k@....qualcomm.com>
> ---
>  drivers/usb/gadget/function/f_ecm.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/usb/gadget/function/f_ecm.c b/drivers/usb/gadget/function/f_ecm.c
> index 80841de845b0..027226325039 100644
> --- a/drivers/usb/gadget/function/f_ecm.c
> +++ b/drivers/usb/gadget/function/f_ecm.c
> @@ -892,6 +892,12 @@ static void ecm_resume(struct usb_function *f)
>  	gether_resume(&ecm->port);
>  }
>  
> +static int ecm_get_status(struct usb_function *f)
> +{
> +	return (f->func_wakeup_armed ? USB_INTRF_STAT_FUNC_RW : 0) |
> +		USB_INTRF_STAT_FUNC_RW_CAP;
> +}
> +
>  static void ecm_free(struct usb_function *f)
>  {
>  	struct f_ecm *ecm;
> @@ -960,6 +966,7 @@ static struct usb_function *ecm_alloc(struct usb_function_instance *fi)
>  	ecm->port.func.disable = ecm_disable;
>  	ecm->port.func.free_func = ecm_free;
>  	ecm->port.func.suspend = ecm_suspend;
> +	ecm->port.func.get_status = ecm_get_status;
>  	ecm->port.func.resume = ecm_resume;
>  
>  	return &ecm->port.func;
> -- 
> 2.25.1
> 

Reviewed-by: Thinh Nguyen <Thinh.Nguyen@...opsys.com>

Thanks,
Thinh