linux-kernel - Re: [PATCH] pcmcia: CompactFlash driver for PA Semi Electra boards

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Message-ID: <20070625155008.GA5217@lixom.net>
Date:	Mon, 25 Jun 2007 10:50:08 -0500
From:	olof@...om.net (Olof Johansson)
To:	Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org, linux-pcmcia@...ts.infradead.org,
	linuxppc-dev@...abs.org, Russell King <rmk+lkml@....linux.org.uk>
Subject: Re: [PATCH] pcmcia: CompactFlash driver for PA Semi Electra boards

On Mon, Jun 25, 2007 at 06:56:36AM +0100, Christoph Hellwig wrote:
> > +static int bus_notify(struct notifier_block *nb, unsigned long action,
> > +		      void *data)
> > +{
> > +	struct device *dev = data;
> > +
> > +	printk("bus notify called\n");
> > +
> > +	/* We are only intereted in device addition */
> > +	if (action != BUS_NOTIFY_ADD_DEVICE)
> > +		return 0;
> > +
> > +	/* We use the direct ops for localbus */
> > +	dev->archdata.dma_ops = &dma_direct_ops;
> > +
> > +	return 0;
> > +}
> 
> Sorry for not coming back to you after the last posting of the patch,
> but I still really this bit of the code.  We don't set dma ops from
> a driver anywhere else in the tree, so I'd really prefer if you could
> handle this in architecture code somewhere.  Especially as dma_direct_ops
> and the pcmcia_bug_type shouldn't really be something exported to users.
> 
> Also this code is unlogic if not buggy.  Just because you have one
> electra bridge it doesn't mean all pcmcia is driven by it.  In fact I'm
> pretty sure there are cardbus/pcmcia bridges that can be plugged into
> plain pci slots.

Yeah, all good points. Also, I obviously missed to take out the debug
printk. I'll post an updated patch separately.


Thanks!

-Olof
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