[PATCH v9 3/3] ahci_xgene: Fix the link down in first attempt for the APM X-Gene SoC AHCI SATA host controller driver.

Tejun Heo tj at kernel.org
Fri Sep 5 19:28:09 PDT 2014

On Thu, Aug 28, 2014 at 02:51:22PM +0530, Suman Tripathi wrote:
> Due to HW errata the APM X-Gene AHCI SATA host controller reports link
> down even if the device presence is detected. This issue is due to speed
> negotiation failure. This patch implements the algorithm to retry the
> COMRESET if PxSTAT register reports device presence detected but
> PHY communication not established. The maximum retry attempts are 3.
> This patch also fixes the code to match the algorithm for the printing
> a warning message if the disparity error still exists after link up.
> Signed-off-by: Loc Ho <lho at apm.com>
> Signed-off-by: Suman Tripathi <stripathi at apm.com>

Applied to libata/for-3.17-fixes.



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