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

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Date:	Tue, 31 Mar 2015 16:36:27 +0100
From:	Peter Griffin <peter.griffin@...aro.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	maxime.coquelin@...com, 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.

Hi Tejun,

On Tue, 31 Mar 2015, 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.

This patch (and also the DT documentation change) can go via your tree. Maxime
will take the stih407 DT patch.

regards,

Peter.


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