linux-kernel - Re: patch "firmware loader: allow disabling of udev as firmware loader" added to driver-core tree

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Date:	Wed, 06 Aug 2014 11:24:58 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Jean-Michel Hautbois <jhautbois@...il.com>
Cc:	Shuah Khan <shuahkhan@...il.com>, B_B_Singh@...l.com,
	Greg KH <gregkh@...uxfoundation.org>, Abhay_Salunke@...l.com,
	Arnd Bergmann <arnd@...db.de>, Kay Sievers <kay@...y.org>,
	Ming Lei <ming.lei@...onical.com>, Stefan Roese <sr@...x.de>,
	Tom Gundersen <teg@...m.no>, Stuart_Hayes@...l.com,
	Srinivas_G_Gowda@...l.com,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: patch "firmware loader: allow disabling of udev as firmware loader" added to driver-core tree

At Wed, 6 Aug 2014 11:10:27 +0200,
Jean-Michel Hautbois wrote:
> 
> 2014-08-05 21:22 GMT+02:00 Shuah Khan <shuahkhan@...il.com>:
> > On Tue, Aug 5, 2014 at 10:01 AM, Takashi Iwai <tiwai@...e.de> wrote:
> >>> Yes, it worked, if the firmware was in the /lib/firmware directory.
> >>
> >
> > ok it works when the firmware is in /lib/firmware. It sounds to me the
> > reason load fails when the firmware is under /sys/class/firmware is
> > fw_load_from_user_helper() returns -ENOENT when
> > CONFIG_FW_LOADER_USER_HELPER is disabled.
> >
> > It would be nice to see the entire dmesg with debug enabled though.
> >
> > -- Shuah
> 
> It does not work with the 3.16 kernel even when firmware is in
> /lib/firmware, it worked before this patch is applied.

Hm?  3.16 doesn't contain my patch yet.  It's merged for 3.17-rc1.

> Here is what I got in my dmesg :
> [    0.307856] __allocate_fw_buf: fw-lattice-ecp3.bit buf=bd81a480
> [    0.308029] lattice-ecp3 spi2.3: Direct firmware load for
> lattice-ecp3.bit failed with error -2

It's -ENOENT.  Are you sure that you really have
 /lib/firmware/lattice-ecp3.bit file?


Takashi

> [    0.308078] __fw_free_buf: fw-lattice-ecp3.bit buf=bd81a480 data=
> (null) size=0
> [    0.308094] lattice-ecp3 spi2.3: Cannot load firmware, aborting
> 
> If you want specific messages, please tell me.
> 
> Thanks,
> JM
> 
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