linux-kernel - Re: [PATCH v1 1/3] usb: gadget: f_ecm: Add get

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Message-ID: <20250409005620.qdzbyasz5mpo5ok6@synopsys.com>
Date: Wed, 9 Apr 2025 00:56:22 +0000
From: Thinh Nguyen <Thinh.Nguyen@...opsys.com>
To: Prashanth K <prashanth.k@....qualcomm.com>
CC: Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        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 v1 1/3] usb: gadget: f_ecm: Add get_status callback

On Tue, Apr 08, 2025, Prashanth K wrote:
> 
> 
> On 08-04-25 06:38 am, Thinh Nguyen wrote:
> > On Thu, Apr 03, 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;
> >> +}
> >> +
> > 
> > Why does USB_INTRF_STAT_FUNC_RW_CAP is set regardless of
> > USB_CONFIG_ATT_WAKEUP?
> >
> We check that in composite.c before calling get_status().
> Have added some comments there [Patch v1 2/3] regarding same.
> 

Ok, let's discuss on the other thread.

Thanks,
Thinh