[PATCH] ahci: preserve PORTS_IMPL over host resets

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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>

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Tejun Heo 2006-11-02 12:17:23 +09:00 • committed by Jeff Garzik

parent ada406c824

commit 98fa4b60c6

1 changed files with 20 additions and 3 deletions

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drivers/ata/ahci.c

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