linux-kernel - Re: [PATCH 4/4] libata: skip debounce delay on link resume

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Message-ID: <20160108165043.GT1898@mtj.duckdns.org>
Date:	Fri, 8 Jan 2016 11:50:43 -0500
From:	Tejun Heo <tj@...nel.org>
To:	Florian Fainelli <f.fainelli@...il.com>
Cc:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	bcm-kernel-feedback-list@...adcom.com, computersforpeace@...il.com,
	gregory.0xf0@...il.com, Danesh Petigara <dpetigara@...adcom.com>
Subject: Re: [PATCH 4/4] libata: skip debounce delay on link resume

On Thu, Jan 07, 2016 at 04:03:33PM -0800, Florian Fainelli wrote:
> From: Danesh Petigara <dpetigara@...adcom.com>
> 
> The link resume logic uses a 200msec delay while debouncing
> the SControl register. The rationale behind that delay is
> to accommodate some PHYs that behave badly if their SStatus/
> SControl registers are pounded immediately on resume.
> The Broadcom STB SATA PHY does not seem to have this issue.
> This patch introduces a new link flag that allows platforms
> to skip the debounce delay if it isn't needed.
> 
> Signed-off-by: Danesh Petigara <dpetigara@...adcom.com>
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>

Applied to libata/for-4.5.

Thanks.

-- 
tejun