diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 6be7770f68e9a16a2aa8555727358c7cf1df5735..077daf0d26047730a9ffdab156039a49c7acc0cf 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5127,7 +5127,9 @@ void ata_qc_complete(struct ata_queued_cmd *qc)
 		switch (qc->tf.command) {
 		case ATA_CMD_SET_FEATURES:
 			if (qc->tf.feature != SETFEATURES_WC_ON &&
-			    qc->tf.feature != SETFEATURES_WC_OFF)
+			    qc->tf.feature != SETFEATURES_WC_OFF &&
+			    qc->tf.feature != SETFEATURES_RA_ON &&
+			    qc->tf.feature != SETFEATURES_RA_OFF)
 				break;
 			/* fall through */
 		case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 99346be5a7ca8ab6986f9fe5c76e9c2787439030..2d6879392ae3c37b696ac4968893bb1d785f3da6 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -409,6 +409,9 @@ enum {
 	SETFEATURES_WC_ON	= 0x02, /* Enable write cache */
 	SETFEATURES_WC_OFF	= 0x82, /* Disable write cache */
 
+	SETFEATURES_RA_ON	= 0xaa, /* Enable read look-ahead */
+	SETFEATURES_RA_OFF	= 0x55, /* Disable read look-ahead */
+
 	/* Enable/Disable Automatic Acoustic Management */
 	SETFEATURES_AAM_ON	= 0x42,
 	SETFEATURES_AAM_OFF	= 0xC2,