linux-kernel - Re: libata/ipr/powerpc: regression between 2.6.39-rc4 and 2.6.39-rc5

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Message-ID: <4DFA0507.3090609@linux.vnet.ibm.com>
Date:	Thu, 16 Jun 2011 08:28:39 -0500
From:	Brian King <brking@...ux.vnet.ibm.com>
To:	Tejun Heo <tj@...nel.org>
CC:	Nishanth Aravamudan <nacc@...ibm.com>,
	linuxppc-dev@...ts.ozlabs.org, wayneb@...ux.vnet.ibm.com,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	mbizon@...ebox.fr, jgarzik@...ox.com
Subject: Re: libata/ipr/powerpc: regression between 2.6.39-rc4 and 2.6.39-rc5

On 06/16/2011 02:51 AM, Tejun Heo wrote:
> On Wed, Jun 15, 2011 at 04:34:17PM -0700, Nishanth Aravamudan wrote:
>>> That looks like the right thing to do. For ipr's usage of
>>> libata, we don't have the concept of a port frozen state, so this flag
>>> should really never get set. The alternate way to fix this would be to
>>> only set ATA_PFLAG_FROZEN in ata_port_alloc if ap->ops->error_handler
>>> is not NULL.
>>
>> It seemed like ipr is as you say, but I wasn't sure if it was
>> appropriate to make the change above in the common libata-scis code or
>> not. I don't want to break some other device on accident.
>>
>> Also, I tried your suggestion, but I don't think that can happen in
>> ata_port_alloc? ata_port_alloc is allocated ap itself, and it seems like
>> ap->ops typically gets set only after ata_port_alloc returns?
> 
> Maybe we can test error_handler in ata_sas_port_start()?

Good point. Since libsas is converted to the new eh now, we would need to have
this test.

Thanks,

Brian

-- 
Brian King
Linux on Power Virtualization
IBM Linux Technology Center


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