Requested by Tuan Hoang (CentOS bug #4923, upstream BZ 715425)
Applied by Akemi Yagi <toracat@centos.org>

diff --git a/drivers/ata/pata_sch.c b/drivers/ata/pata_sch.c
index c8cc027..6aeeeeb 100644
--- a/drivers/ata/pata_sch.c
+++ b/drivers/ata/pata_sch.c
@@ -83,7 +83,7 @@
 };
 
 static struct ata_port_info sch_port_info = {
-	.flags		= 0,
+	.flags		= ATA_FLAG_SLAVE_POSS,
 	.pio_mask	= ATA_PIO4,   /* pio0-4 */
 	.mwdma_mask	= ATA_MWDMA2, /* mwdma0-2 */
 	.udma_mask	= ATA_UDMA5,  /* udma0-5 */