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Date:   Fri, 4 Nov 2011 17:43:19 +0000
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
Message-ID: <20111104174319.GA18037@linux-mips.org>
References: <1320418191-22096-1-git-send-email-manuel.lauss@googlemail.com>
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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