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

[Tejun Heo]

On Tue, May 26, 2015 at 06:47:23PM +0200, Gregory CLEMENT wrote:
> From: Nadav Haklai <nadavh at marvell.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 at free-electrons.com: add extra-explanation]
> 
> Fixes: a3464ed2f14 (ata: ahci_mvebu: new driver for Marvell Armada 380
> AHCI interfaces)
> Signed-off-by: Nadav Haklai <nadavh at marvell.com>
> Reviewed-by: Omri Itach <omrii at marvell.com>
> Signed-off-by: Gregory CLEMENT <gregory.clement at free-electrons.com>
> Cc: <stable at vger.kernel.org>

Applied to libata/for-4.1-fixes.

Thank you.

-- 
tejun