--- a/drivers/ata/libata-pmp.c	2012-03-12 20:43:00.625871123 +0900
+++ b/drivers/ata/libata-pmp.c	2012-03-12 20:43:19.845080223 +0900
@@ -391,7 +391,8 @@ static void sata_pmp_quirks(struct ata_p
 
 			/* Class code report is unreliable. */
 			if (link->pmp < 5)
-				link->flags |= ATA_LFLAG_ASSUME_ATA;
+				link->flags |= ATA_LFLAG_NO_SRST |
+					       ATA_LFLAG_ASSUME_ATA;
 
 			/* port 5 is for SEMB device and it doesn't like SRST */
 			if (link->pmp == 5)