linux-kernel - Re: [PATCH] ata: ahci_mvebu: Fix wrongly set base address for the MBus window setting

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Message-ID: <20150526184728.GJ7099@htj.duckdns.org>
Date:	Tue, 26 May 2015 14:47:28 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
Cc:	Hans de Goede <hdegoede@...hat.com>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org, Jason Cooper <jason@...edaemon.net>,
	Andrew Lunn <andrew@...n.ch>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org,
	Lior Amsalem <alior@...vell.com>,
	Tawfik Bayouk <tawfik@...vell.com>,
	Nadav Haklai <nadavh@...vell.com>, stable@...r.kernel.org
Subject: Re: [PATCH] ata: ahci_mvebu: Fix wrongly set base address for the
 MBus window setting

On Tue, May 26, 2015 at 06:47:23PM +0200, Gregory CLEMENT wrote:
> From: Nadav Haklai <nadavh@...vell.com>
> 
> According to the Armada 38x datasheet, the window base address
> registers value is set in bits [31:4] of the register and corresponds
> to the transaction address bits [47:20].
> 
> Therefore, the 32bit base address value should be shifted right by
> 20bits and left by 4bits, resulting in 16 bit shift right.
> 
> The bug as not been noticed yet because if the memory available on
> the platform is less than 2GB, then the base address is zero.
> 
> [gregory.clement@...e-electrons.com: add extra-explanation]
> 
> Fixes: a3464ed2f14 (ata: ahci_mvebu: new driver for Marvell Armada 380
> AHCI interfaces)
> Signed-off-by: Nadav Haklai <nadavh@...vell.com>
> Reviewed-by: Omri Itach <omrii@...vell.com>
> Signed-off-by: Gregory CLEMENT <gregory.clement@...e-electrons.com>
> Cc: <stable@...r.kernel.org>

Applied to libata/for-4.1-fixes.

Thank you.

-- 
tejun
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