From: Manuel Estrada Sainz <ranty@debian.org>
To: "Perez-Gonzalez, Inaky" <inaky.perez-gonzalez@intel.com>
Cc: "'David Gibson'" <david@gibson.dropbear.id.au>,
"'Alan Cox'" <alan@lxorguk.ukuu.org.uk>,
"'Linux Kernel Mailing List'" <linux-kernel@vger.kernel.org>
Subject: Re: firmware separation filesystem (fwfs)
Date: Thu, 17 Apr 2003 05:31:54 +0200 [thread overview]
Message-ID: <20030417033154.GD31473@ranty.ddts.net> (raw)
In-Reply-To: <A46BBDB345A7D5118EC90002A5072C780C262E38@orsmsx116.jf.intel.com>
On Wed, Apr 16, 2003 at 07:00:00PM -0700, Perez-Gonzalez, Inaky wrote:
>
> > From: David Gibson [mailto:david@gibson.dropbear.id.au]
> >
> > Incidentally another approach that also avoids nasty ioctl()s would be
> > to invoke the userland helper with specially set up FD 1, which lets
> > the kernel capture the program's stdout.
>
> I think this makes too many assumptions specially taking into
> account that most hotplug stuff are shell scripts - they are
> probably going to be writing all kinds of stuff to stdout.
Well, FD 3 could be used instead and "cat firmware_image >&3". shell
scripts should not be writing to FD 3.
> With the risk of repeating myself (again) and being a PITA,
> I really think it'd be easier to copy the firmware file to a
> /sysfs binary file registered by the device driver during
> initialization; then the driver can wait for the file to be
> written with a valid firmware before finishing the init
> sequence. The infrastructure is already there (or isn't ...
> is it?).
I don't know that much about sysfs, after a little investigation, it
seams like sysfs entries are restricted in size to PAGE_SIZE, which on
i386 is 4K, and ezusb firmware is already 6.9K in size.
I would really appreciate someone more knowledgeable than myself
commenting on the possibility of extending sysfs to fill this gap.
Have a nice day
ranty
--
--- Manuel Estrada Sainz <ranty@debian.org>
<ranty@bigfoot.com>
<ranty@users.sourceforge.net>
------------------------ <manuel.estrada@hispalinux.es> -------------------
Let us have the serenity to accept the things we cannot change, courage to
change the things we can, and wisdom to know the difference.
next prev parent reply other threads:[~2003-04-17 3:20 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-17 2:00 firmware separation filesystem (fwfs) Perez-Gonzalez, Inaky
2003-04-17 3:31 ` Manuel Estrada Sainz [this message]
2003-04-17 4:06 ` Greg KH
2003-04-17 3:48 ` 'David Gibson'
-- strict thread matches above, loose matches on Subject: below --
2003-04-17 4:07 Perez-Gonzalez, Inaky
2003-04-17 0:17 Perez-Gonzalez, Inaky
2003-04-16 0:57 Manuel Estrada Sainz
2003-04-16 11:31 ` Alan Cox
2003-04-16 14:46 ` David Gibson
2003-04-16 16:36 ` Manuel Estrada Sainz
2003-04-16 15:47 ` Alan Cox
2003-04-16 16:57 ` Riley Williams
2003-04-17 13:43 ` Alan Cox
2003-04-17 13:43 ` Alan Cox
2003-04-17 1:23 ` David Gibson
2003-04-17 13:12 ` Alan Cox
2003-04-19 20:41 ` Manuel Estrada Sainz
2003-04-19 21:52 ` Alan Cox
2003-04-20 19:26 ` Manuel Estrada Sainz
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