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From: Benjamin Herrenschmidt <benh-XVmvHMARGAS8U2dJNN8I7kB+6BGkLq7r@public.gmane.org>
To: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
Cc: linuxppc-dev-mnsaURCQ41sdnm+yROfE0A@public.gmane.org,
	devicetree-discuss-mnsaURCQ41sdnm+yROfE0A@public.gmane.org,
	Linux Netdev List
	<netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [net-next-2.6 PATCH v2] can: SJA1000: generic OF platform bus driver
Date: Tue, 26 May 2009 19:40:43 +1000	[thread overview]
Message-ID: <1243330843.2858.71.camel@pasglop> (raw)
In-Reply-To: <200905261010.31364.arnd-r2nGTMty4D4@public.gmane.org>

On Tue, 2009-05-26 at 10:10 +0100, Arnd Bergmann wrote:
> On Monday 25 May 2009, Wolfgang Grandegger wrote:
> > > Right, that makes sense. However, most drivers use the field to store the
> > > physical address, not the iomap token. Maybe there should be a new field
> > > in struct sja1000_priv for the virtual address, but that would be a change
> > > to the base driver, not just to the OF portion.
> > 
> > Is that common practice? If yes, I will add a member to store the
> > virtual address to struct sja1000_priv.
> 
> I grepped through the network driver for usage of ->base_addr, and
> it's somewhat inconsistent. The majority of the users use it for
> a physical address, but there are also a few that use it for the
> __iomem token.

In addition, iirc, it's not big enough to hold >32 bit physical
addresses on 32-bit platforms no ?

Ben.

> Casts between unsigned long and qualified (__iomem, __user, const, ...)
> pointers do not cause a warning, but can easily lead to bugs when
> another user casts to an unqualified pointer.
> 
> 	Arnd <><
> 
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev-mnsaURCQ41sdnm+yROfE0A@public.gmane.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev

      parent reply	other threads:[~2009-05-26  9:40 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-22 14:46 [net-next-2.6 PATCH v2] can: SJA1000: generic OF platform bus driver Wolfgang Grandegger
     [not found] ` <4A16BAAE.3070401-5Yr1BZd7O62+XT7JhA+gdA@public.gmane.org>
2009-05-22 15:08   ` Grant Likely
     [not found]     ` <fa686aa40905220808kecd06cdqb570b78ca97f0ca6-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-05-23  6:29       ` Wolfgang Grandegger
2009-05-23 16:44         ` Wolfgang Grandegger
2009-05-25  6:53           ` Grant Likely
2009-05-25  8:15             ` Wolfgang Grandegger
2009-05-23 11:15 ` Arnd Bergmann
     [not found]   ` <200905231315.57016.arnd-r2nGTMty4D4@public.gmane.org>
2009-05-23 16:51     ` Wolfgang Grandegger
2009-05-24 22:27       ` Arnd Bergmann
2009-05-25  6:58         ` Wolfgang Grandegger
2009-05-26  9:10           ` Arnd Bergmann
     [not found]             ` <200905261010.31364.arnd-r2nGTMty4D4@public.gmane.org>
2009-05-26  9:25               ` David Miller
2009-05-26  9:42                 ` Arnd Bergmann
2009-05-26 11:20                   ` Sascha Hauer
2009-05-26 14:23                 ` Wolfgang Grandegger
2009-05-30 17:59                   ` Wolfgang Grandegger
2009-05-26  9:40               ` Benjamin Herrenschmidt [this message]

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