tree 87d7c55a27f0553f901b0c3ef4dfef792a3f946c
parent 999bb6f4260f9499fdeab3f8fdcd8b9013eca39e
author Albert Lee <albertcc@tw.ibm.com> 1143281472 +0800
committer Jeff Garzik <jeff@garzik.org> 1143670956 -0500

[PATCH] libata-dev: fix the device err check sequence (respin)

Current irq-pio checks ERR bit and stops on ERR before it does anything else.
This behavior doesn't look right.
The DRQ bit should take higher precedence than the ERR bit.

Changes:
- Let the HSM do the data transfer whenever the
  device asks for DRQ bit, even if the ERR bit is set.
- For DRQ=1 ERR=1, don't trust the data

Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>