linux-kernel - Re: [PATCH] Fixes and enhancements for the MMC SPI driver

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Message-Id: <200901081119.00812.wolfgang.mues@auerswald.de>
Date:	Thu, 8 Jan 2009 11:19:00 +0100
From:	Wolfgang Mües <wolfgang.mues@...rswald.de>
To:	"Matt Fleming" <matt@...sole-pimps.org>
Cc:	"David Brownell" <dbrownell@...rs.sourceforge.net>,
	linux-kernel@...r.kernel.org, "Pierre Ossman" <drzeus@...eus.cx>
Subject: Re: [PATCH] Fixes and enhancements for the MMC SPI driver

Matt,

Am Donnerstag, 8. Januar 2009 schrieb Matt Fleming:
> My concern is that completely broken cards may be able to get away with
> more if the timeout is extended.

Ah, and you think that the failure of these cards in some embedded devices 
will push the vendors of these cards to fix their bugs?

Sorry, I don't think so. If this driver will run in more than 50% of all SD 
card devices: yes. But in reality, it will be below 1%...

> There is clearly a tradeoff here between supporting non-conforming cards 
> and easily detecting broken cards. 

IMHO, not supporting a non-conforming card (if you CAN) is ignorance. 
Ignorance to the user, which you leave alone with her problems.

> Someone suggested to me off list that having a configuration option to
> enable/disable the longer timeout is a good compromise, and I agree.

I don't see value in this compromise. The person which is able to turn the 
configuration option will be != the user of the device and != the owner of 
the card. 

best regards
 
i. A. Wolfgang Mües
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