linux-kernel - Re: [PATCH] 2/3 mtd: add support for flash on the SEGA Dreamcast Visual Memory Unit

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Date:	Sat, 22 Mar 2008 19:32:00 +0100
From:	Jörn Engel <joern@...fs.org>
To:	Adrian McMenamin <adrian@...golddream.dyndns.info>
Cc:	dwmw2 <dwmw2@...radead.org>, Andrew Morton <akpm@...l.org>,
	linux-sh <linux-sh@...r.kernel.org>, Greg KH <greg@...ah.com>,
	Paul Mundt <lethal@...rs.sourceforge.net>,
	LKML <linux-kernel@...r.kernel.org>,
	MTD <linux-mtd@...ts.infradead.org>
Subject: Re: [PATCH] 2/3 mtd: add support for flash on the SEGA Dreamcast Visual Memory Unit

On Sat, 22 March 2008 18:03:55 +0000, Adrian McMenamin wrote:
> 
> The SEGA Visual Memory Unit includes 128k of flash memory
> which can be read in blocks.
> 
> The hardware specification is also capable of supporting
> partitions (though it is doubtful such devices exist).
> 
> This driver supports block reads and writes, as well as
> queries of hardware capabilities, through the maple
> bus susbsystem.
> 
> (It also implements a caching system so that, for instance, a
> read of 60 bytes will take 1/60th - or 1/50th in PAL regions -
> of a second instead of a second or 1.2 seconds.)

Without a doubt, buffering is useful.  However I question how useful it
is to implement this in individual device drivers instead of once in
mtd_core.c.

> Signed-off-by: Adrian McMenamin <adrian@...en.demon.co.uk>

Given that you have ignored most of my previous comments, NAK.  I don't
mind merging code that isn't up to our standards yet.  But I have a bad
feeling about a maintainer that does not understand review comments.
Since you had similar problems understanding Andrew, part of the blame
may sit on your side.

Jörn

-- 
The key to performance is elegance, not battalions of special cases.
-- Jon Bentley and Doug McIlroy
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