linux-kernel - Re: [PATCH] ata: pata_platform: Disable prereset logic.

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Message-ID: <46540981.9080603@gmail.com>
Date:	Wed, 23 May 2007 11:29:37 +0200
From:	Tejun Heo <htejun@...il.com>
To:	Paul Mundt <lethal@...ux-sh.org>, Tejun Heo <htejun@...il.com>,
	Jeff Garzik <jgarzik@...ox.com>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ata: pata_platform: Disable prereset logic.

Paul Mundt wrote:
> On Wed, May 23, 2007 at 10:07:08AM +0200, Tejun Heo wrote:
>> Paul Mundt wrote:
>>> On a number of boards the current prereset logic seems to misbehave:
>>>
>>> scsi0 : pata_platform
>>> ata1: PATA max PIO0 cmd 0xb06001f0 ctl 0xb06003f6 bmdma 0x00000000 irq 0
>>> ata1: device not ready (errno=-19), forcing hardreset
>>> ata1: BUG: prereset() requested invalid reset type
>>>
>>> This triggers when there is no card inserted in the slot.
>>>
>>> Simply disabling the prereset gets rid of this, and doesn't seem to cause
>>> any problems for either PCMCIA or CF cards when they're actually present.
>> NACK.  The BUG printking needs fixing but you can't just kill
>> prereset().  Did it work properly on 2.6.21.1?  Can you modify
>> ata_wait_ready() such that it prints out the status value while waiting?
>>
> ata_wait_ready() works fine, it reports 0xff immediately (and this is
> what I would expect when there is no card inserted).

Does the attached patch fix your problem?

-- 
tejun

View attachment "patch" of type "text/plain" (526 bytes)