linux-kernel - Re: ioremap warning fix for jsm driver.

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Message-ID: <20110601203258.01f3249f@lxorguk.ukuu.org.uk>
Date:	Wed, 1 Jun 2011 20:32:58 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	lsorense@...lub.uwaterloo.ca (Lennart Sorensen)
Cc:	linux-serial@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	greg@...ah.com
Subject: Re: ioremap warning fix for jsm driver.

On Wed, 1 Jun 2011 14:38:41 -0400
lsorense@...lub.uwaterloo.ca (Lennart Sorensen) wrote:

> I saw a warning about ioremap from the jsm driver on a system which
> looked like this:
> 
> resource map sanity check conflict: 0xe0200800 0xe02017ff 0xe0200800 0xe0200fff 0000:01:08.0
> 
> Turns out the warning is valid.  The jsm driver has been asking to ioremap
> 0x1000 forever, but in fact only 8 port chips have 0x1000 bytes of memory.
> 4 port chips have 0x800 and 2 port chips have 0x400 according to the
> data sheet.  It makes more sense to map the size of the region rather
> than a hard coded value.  If you happen to have the regiong legitimately
> mapped to a base addres that is not 4K aligned, ioremap complains
> otherwise.
> 
> Signed-off-by: Len Sorensen <lsorense@...lub.uwaterloo.ca>

Acked-by: Alan Cox <alan@...ux.intel.com>
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