From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Mon, 7 Nov 2005 17:06:33 +0000 (+0000)
Subject: [PATCH] libata: Note a nasty ATA quirk
X-Git-Url: http://git.mmlx.us/?a=commitdiff_plain;h=f51750d5eab50f0db5396a5ca30d5bafc038c263;p=linux-edison.git

[PATCH] libata: Note a nasty ATA quirk

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
---

diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index bb30fcdc929..7e37f488f59 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -1129,6 +1129,8 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm
 		 * length 0 means transfer 0 block of data.
 		 * However, for ATA R/W commands, sector count 0 means
 		 * 256 or 65536 sectors, not 0 sectors as in SCSI.
+		 *
+		 * WARNING: one or two older ATA drives treat 0 as 0...
 		 */
 		goto nothing_to_do;