linux-kernel - Re: udev breakages - was: Re: Need of an ".async_probe()" type of callback at driver's core - Was: Re: [PATCH] [media] drxk: change it to use request_firmware

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Message-ID: <20121003195059.GA13541@kroah.com>
Date:	Wed, 3 Oct 2012 12:50:59 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Al Viro <viro@...iv.linux.org.uk>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Ming Lei <ming.lei@...onical.com>, Kay Sievers <kay@...y.org>,
	Lennart Poettering <lennart@...ttering.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kay Sievers <kay@...hat.com>,
	Linux Media Mailing List <linux-media@...r.kernel.org>,
	Michael Krufky <mkrufky@...uxtv.org>,
	Ivan Kalvachev <ikalvachev@...il.com>
Subject: Re: udev breakages - was: Re: Need of an ".async_probe()" type of
 callback at driver's core - Was: Re: [PATCH] [media] drxk: change it to use
 request_firmware_nowait()

On Wed, Oct 03, 2012 at 10:32:08AM -0700, Linus Torvalds wrote:
> On Wed, Oct 3, 2012 at 10:09 AM, Al Viro <viro@...iv.linux.org.uk> wrote:
> >
> > +       if (!S_ISREG(inode->i_mode))
> > +               return false;
> > +       size = i_size_read(inode);
> >
> > Probably better to do vfs_getattr() and check mode and size in kstat; if
> > it's sufficiently hot for that to hurt, we are fucked anyway.
> >
> > +               file = filp_open(path, O_RDONLY, 0);
> > +               if (IS_ERR(file))
> > +                       continue;
> > +printk("from file '%s' ", path);
> > +               success = fw_read_file_contents(file, fw);
> > +               filp_close(file, NULL);
> >
> > fput(file), please.  We have enough misuses of filp_close() as it is...
> 
> Ok, like this?

This looks good to me.  Having udev do firmware loading and tieing it to
the driver model may have not been such a good idea so many years ago.
Doing it this way makes more sense.

greg k-h
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