From: Ralf Baechle <ralf@linux-mips.org>
To: Manuel Lauss <manuel.lauss@googlemail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Subject: Re: [PATCH] MIPS: remove port limit in ioport_map
Date: Fri, 4 Nov 2011 17:43:19 +0000 [thread overview]
Message-ID: <20111104174319.GA18037@linux-mips.org> (raw)
In-Reply-To: <1320418191-22096-1-git-send-email-manuel.lauss@googlemail.com>
On Fri, Nov 04, 2011 at 03:49:51PM +0100, Manuel Lauss wrote:
> Alchemy PCMCIA IO lies outside the 32bit address space and needs to
> be ioremapped to be accessible. The resulting address is
> then fed as IO-port base to all PCMCIA client drivers attached
> to a particular socket. pata_pcmcia does devm_ioport_map() on
> the port address, which returns errors because MIPS' ioport_map()
> implementation rejects incoming port addresses which are not
> within the 0..64k window. Other embedded architectures don't
> bother with a check like this; this patch brings MIPS in line
> and in turn makes pata_pcmcia work on all my Alchemy systems
> (and doesn't break PCI).
The reason for this had something to do with multiple PCI busses with
devices using I/O ports but I forgot what it was :). Need to think about
this one.
Ralf
prev parent reply other threads:[~2011-11-04 17:43 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-04 14:49 [PATCH] MIPS: remove port limit in ioport_map Manuel Lauss
2011-11-04 17:43 ` Ralf Baechle [this message]
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