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

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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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Suman Tripathi 2014-12-29 08:52:47 +05:30 • committed by Tejun Heo

parent 5c0b8e0de7

commit 1102407bb7

1 changed files with 7 additions and 5 deletions

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drivers/ata/ahci_xgene.c

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