From: Eran Tromer <eran@tromer.org>
Date: Tue, 10 Oct 2006 21:29:25 +0000 (-0700)
Subject: [PATCH] libata: return sense data in HDIO_DRIVE_CMD ioctl
X-Git-Tag: v2.6.19-rc2~22^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bbe1fe7ea3438f8c4447dbcd46a126581ed2ed41;p=pandora-kernel.git

[PATCH] libata: return sense data in HDIO_DRIVE_CMD ioctl

Make the HDIO_DRIVE_CMD ioctl in libata (ATA command pass through) return a
few ATA registers to userspace, following the same convention as the
drivers/ide implementation of the same ioctl.  This is needed to support ATA
commands like CHECK POWER MODE, which return information in nsectors.

This fixes "hdparm -C" on SATA drives.

Forcing the sense data read via the cc flag causes spurious check conditions,
so we filter these out (following the ATA command pass-through specification
T10/04-262r7).

Signed-off-by: Eran Tromer <eran@tromer.org>
Acked-by: Tejun Heo <htejun@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

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