ahci_xgene: Implement the workaround to support PMP enumeration and discovery.

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Due to H/W errata, the controller is unable to save the PMP
field fetched from command header before sending the H2D FIS.
When the device returns the PMP port field in the D2H FIS, there is
a mismatch and results in command completion failure. The workaround
is to write the pmp value to PxFBS.DEV field before issuing any command
to PMP.

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

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Suman Tripathi 2015-01-06 15:32:16 +05:30 • committed by Tejun Heo

parent 1540035da7

commit a3a84bc7c8

1 changed files with 128 additions and 5 deletions

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drivers/ata/ahci_xgene.c

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