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| /openbmc/linux/drivers/ata/ |
| H A D | ahci_xgene.c | diff 1102407bb714dcebb43f385335bcb72f6b8843bc Sun Dec 28 21:22:47 CST 2014 Suman Tripathi <stripathi@apm.com> 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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