linux-kernel - RE: USB remote wakeup through gpio interrupt

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: <f48282eff10c475d82034576c081614d@BL2PR03MB226.namprd03.prod.outlook.com>
Date:	Thu, 6 Mar 2014 09:34:40 +0000
From:	Peter Chen <Peter.Chen@...escale.com>
To:	Jagdish Gedia <jvgediya@...il.com>
CC:	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: USB remote wakeup through gpio interrupt


 
> 
> Hi Peter,
> 
> My usb device is not capable of giving interrupt when it finishes using
> usb. So i dont have any idea where can i call pm_runtime_put for my usb
> device?
> 
> the other thing is that, earlier you have told, waking up usb device
> through interrupt is same as writing "on" to ../power/control , but i
> think writing "on" to ../power/control will disable the autosuspend for
> usb device in future, but i want autosuspend to be enabled for my usb
> device always. Will using pm_runtime_get and pm_runtime_put cause the
> disable of autosuspend for usb device?
> 

It is not related to autosuspend. Make sure you use above two APIs in pair.
Of cos, writing "on" to "../power/control" will disable autosuspend.

Peter

> 
> Thanks,
> Jagdish Gediya
> 
> On Thu, Mar 6, 2014 at 2:53 PM, Jagdish Gedia <jvgediya@...il.com> wrote:
> > Hi Alan,
> >
> > As you have told, i have executed pm_request_resume() function from my
> > interrupt handler, and it is waking up my USB device. I have
> > implemented all this functionality in class driver(cdc-acm.c).
> > but what is happening is after 2-3 times, ausosuspend is getting
> > disable for my device. I want autosuspend to be enabled for usb device
> > forever. Do pm_request_resume function causes this behavior?
> >
> >
> >
> > Thanks,
> > Jagdish Gediya
> 

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/