From: Mark Lord <mlord@pobox.com>
Date: Wed, 25 Feb 2009 20:17:43 +0000 (-0500)
Subject: [libata] sata_mv: Add a new mv_sff_check_status() function to sata_mv.
X-Git-Tag: v2.6.30-rc1~669^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d16ab3f633b75aac1cf42b00355cd9aa65033dcc;p=pandora-kernel.git

[libata] sata_mv: Add a new mv_sff_check_status() function to sata_mv.
This is necessary for use with the upcoming "mv_qc_issue_fis()" patch,
but is being added separately here for easier code review.

When using command issue via the "mv_qc_issue_fis()" mechanism,
the initial ATA_BUSY bit does not show in the ATA status (shadow) register.
This can confuse libata!  So here we add a hook to fake ATA_BUSY
for that situation, until the first time a BUSY, DRQ, or ERR bit is seen.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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