From: Suman Tripathi <stripathi@apm.com>
Date: Mon, 29 Dec 2014 03:22:47 +0000 (+0530)
Subject: ahci_xgene: Fix the DMA state machine lockup for the ATA_CMD_PACKET PIO mode command.
X-Git-Tag: fixes-v4.0-rc1~268^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1102407bb714dcebb43f385335bcb72f6b8843bc;p=pandora-kernel.git

ahci_xgene: Fix the DMA state machine lockup for the ATA_CMD_PACKET PIO mode command.

This patch addresses the issue with ATA_CMD_PACKET pio mode
command for enumeration and device detection with ATAPI devices.
The X-Gene AHCI controller has an errata in which it cannot clear
the BSY bit after the PIO setup FIS. The dma state machine enters
CMFatalErrorUpdate state and locks up.

Signed-off-by: Suman Tripathi <stripathi@apm.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
---

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