linux-kernel - Re: [PATCH v1 2/3] usb: gadget: Use get_status callback to set remote wakeup capability

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250409221158.n5duanv2gmctrr64@synopsys.com>
Date: Wed, 9 Apr 2025 22:12:01 +0000
From: Thinh Nguyen <Thinh.Nguyen@...opsys.com>
To: Prashanth K <prashanth.k@....qualcomm.com>
CC: 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 2/3] usb: gadget: Use get_status callback to set remote
 wakeup capability

On Wed, Apr 09, 2025, Thinh Nguyen wrote:
> On Wed, Apr 09, 2025, Prashanth K wrote:
> > 
> > 
> > On 09-04-25 06:25 am, Thinh Nguyen wrote:
> > > 
> > > Not at the gadget level, I mean to create a configfs attribute common
> > > across different functions to allow the user to enable/disable the
> > > function wakeup capability via the configfs when you setup the function.
> > > 
> > > What do you think?
> > > 
> > > Thanks,
> > > Thinh
> > 
> > Thats a good idea, in fact I had the same thought. But thought of doing
> > it later since its beyond the scope of this patch/series.
> 
> The way you have it done now forces a usb3x function driver to implement
> f->get_status to be able to respond with function wakeup capable.
> Previously, we automatically enable function wakeup capability for all
> functions if the USB_CONFIG_ATT_WAKEUP is set.
> 
> Arguably, this can cause a regression for remote capable devices to
> operate in usb3 speeds.

Sorry typos: I mean arguably, this can cause a regression for remote
wake capable devices to perform remote wakeup in usb3 speed.

BR,
Thinh

> 
> > 
> > We can add a configfs attribute to enable/disable FUNC_RW_CAP, and
> > functions can return get_status() based on the attribute.
> > 
> 
> That would be great! This would fit this series perfectly. Let me know
> if there's an issue.
> 
> Thanks,
> Thinh