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Message-ID: <s5hmw0x4z12.wl-tiwai@suse.de>
Date: Thu, 21 May 2015 19:32:25 +0200
From: Takashi Iwai <tiwai@...e.de>
To: Arend van Spriel <arend@...adcom.com>
Cc: Alan Stern <stern@...land.harvard.edu>,
Marcel Holtmann <marcel@...tmann.org>,
Laura Abbott <labbott@...hat.com>,
Oliver Neukum <oneukum@...e.com>,
Ming Lei <ming.lei@...onical.com>,
"David S. Miller" <davem@...emloft.net>,
Laura Abbott <labbott@...oraproject.org>,
"Johan Hedberg" <johan.hedberg@...il.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
"Gustavo F. Padovan" <gustavo@...ovan.org>,
"bluez mailin list (linux-bluetooth@...r.kernel.org)"
<linux-bluetooth@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
USB list <linux-usb@...r.kernel.org>,
netdev <netdev@...r.kernel.org>
Subject: Re: [RESEND][PATCH] Bluetooth: Make request workqueue freezable
At Thu, 21 May 2015 19:27:41 +0200,
Arend van Spriel wrote:
>
> On 05/21/15 17:35, Takashi Iwai wrote:
> > At Thu, 21 May 2015 11:26:17 -0400 (EDT),
> > Alan Stern wrote:
> >>
> >> On Thu, 21 May 2015, Takashi Iwai wrote:
> >>
> >>> At Thu, 21 May 2015 10:18:08 -0400 (EDT),
> >>> Alan Stern wrote:
> >>>>
> >>>> On Thu, 21 May 2015, Takashi Iwai wrote:
> >>>>
> >>>>> Then avoiding the failed firmware is no solution, indeed.
> >>>>> If it's a new probe, it should be never executed during resume.
> >>>>
> >>>> Can you expand this comment? What's wrong with probing during resume?
> >>>
> >>> Well, if the probe requires the access to a user-space file, it can't
> >>> be done during resume. That's the very problem we're seeing now.
> >>> The firmware loader can't help much alone if it's a new device
> >>> object.
> >>
> >> But the same thing happens during early boot, if the driver is built
> >> into the kernel. When the probe occurs, userspace isn't up and running
> >> yet, so the firmware loader can't do anything.
> >>
> >> Why should probe during resume be any worse than probe during early
> >> boot?
> >
> > The early boot has initrd, so the files can be there. But the resume
> > has no way to fetch the file except for cached data.
>
> but initrd is optional so without initrd it is pretty much the same.
User can build the firmware into the kernel.
Takashi
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