linux-kernel - Re: [PATCH 3/3] ahci: st: st_configure_oob must be called after IP is clocked.

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Message-ID: <551ABE43.60602@st.com>
Date:	Tue, 31 Mar 2015 17:33:23 +0200
From:	Maxime Coquelin <maxime.coquelin@...com>
To:	Tejun Heo <tj@...nel.org>, Peter Griffin <peter.griffin@...aro.org>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <patrice.chotard@...com>,
	<srinivas.kandagatla@...il.com>, <lee.jones@...aro.org>,
	<devicetree@...r.kernel.org>, <linux-ide@...r.kernel.org>
Subject: Re: [PATCH 3/3] ahci: st: st_configure_oob must be called after IP
 is clocked.

Hello Tejun,

On 03/31/2015 05:29 PM, Tejun Heo wrote:
> On Tue, Mar 31, 2015 at 08:35:09AM +0100, Peter Griffin wrote:
>> Currently the ahci_st driver will hang the system on probe, as the
>> st_configure_oob function does some register writes before the IP
>> is clocked. This patch moves the function call to after
>> ahci_platform_enable_resources (which enables the IP clock), and
>> resolves the hang.
>>
>> Addtionally st_ahci_configure_oob should be called in the st_ahci_resume
>> function, so we also rectify that ensuring it is also called after
>> the IP clock has been enabled.
>>
>> Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
>> Acked-by: Lee Jones <lee.jones@...aro.org>
>> Acked-by: Maxime Coquelin <maxime.coquelin@...com>
> How should this patch be routed?  Should I pick this up and apply to
> libata/for-4.1 or should it go together with the other patches?  If
> the latter, please feel free to add my acked-by.

I think you can pick patches 1 & 3.
I will apply patch 2 to STi DT branch.

Thanks,
Maxime
>
> Thanks.
>

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