[PATCH] libata: Note a nasty ATA quirk

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

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index bb30fcdc9297..7e37f488f591 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;