linux-kernel - Re: [PATCH RESEND] libahci_platform: Fail when PHY required but PHY support disabled

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Date:	Tue, 17 Jun 2014 10:27:27 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Mikko Perttunen <mperttunen@...dia.com>
Cc:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND] libahci_platform: Fail when PHY required but PHY
 support disabled

On Tue, Jun 17, 2014 at 03:07:55PM +0300, Mikko Perttunen wrote:
> ahci_platform_get_resources handles resource management for
> platform AHCI drivers, including getting a possible PHY
> from the device tree. Since not all drivers need a PHY, it
> ignores -ENODEV and -ENOSYS from devm_get_phy. However, when
> the PHY subsystem is mistakenly disabled, -ENOSYS can be
> returned even when a PHY is needed.
> 
> This patch modifies the -ENOSYS case to check if a "phys"
> device tree node exists. If it exists, then clearly the PHY
> subsystem is mistakenly disabled and the driver cannot work,
> ahci_platform_get_resources will fail and propagate the error.
> 
> Signed-off-by: Mikko Perttunen <mperttunen@...dia.com>

Applied to libata/for-3.17.

Thanks.

-- 
tejun
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