Re: [PATCH v2] ahci: disable DEVSLP for Intel Valleyview

[Tejun Heo]

On Tue, Apr 15, 2014 at 10:27:11PM -0700, Jacob Pan wrote:
> On Intel Valleyview SoC, SATA device sleep is not reliable. When
> DEVSLP is attempted on certain SSDs, port_devslp write would fail
> and result in malfunction of AHCI controller. AHCI controller may
> be not shown in PCI enumeration after reset. Complete power source
> removal may be required to recover from this failure. So we blacklist
> this device and override host device reported capabilities such that
> device LPM will only attempt slumber but not DEVSLP.
> 
> Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
> Acked-by: Dan Williams <dan.j.williams@xxxxxxxxx>

Applied to libata/for-3.15-fixes.

Thanks.

-- 
tejun
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