tree 696cb1f0d19bbda6dc9030eb11e4b2754472dfaa
parent ada406c8246b0792afe4d7f8ae7606093052de87
author Tejun Heo <htejun@gmail.com> 1162437443 +0900
committer Jeff Garzik <jeff@garzik.org> 1165030891 -0500

[PATCH] ahci: preserve PORTS_IMPL over host resets

Instead of writing 0xf blindly, preserve the content of write-once
PORTS_IMPL register over host resets.

This patch is taken from Jeff Garzik's AHCI init update patch.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>