diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 966abb5f423eee7ddec498276b831e9be5a697b7..1c34c1427aa3dda111cf88b5c292b35dc10f3572 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -1001,7 +1001,7 @@ unsigned ata_exec_internal(struct ata_device *dev,
 
 	if (test_and_set_bit(tag, &ap->qactive))
 		BUG();
-	qc = ata_qc_from_tag(ap, tag);
+	qc = __ata_qc_from_tag(ap, tag);
 
 	qc->tag = tag;
 	qc->scsicmd = NULL;
@@ -4042,7 +4042,7 @@ static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
 	/* the last tag is reserved for internal command. */
 	for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
 		if (!test_and_set_bit(i, &ap->qactive)) {
-			qc = ata_qc_from_tag(ap, i);
+			qc = __ata_qc_from_tag(ap, i);
 			break;
 		}
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 5a403e434ff809d30a0246b45d61ebf1a88402c8..bfcefdca06164ed1b383556a4679904925edc967 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -832,14 +832,29 @@ static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
 	qc->tf.ctl |= ATA_NIEN;
 }
 
-static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap,
-						      unsigned int tag)
+static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
+						       unsigned int tag)
 {
 	if (likely(ata_tag_valid(tag)))
 		return &ap->qcmd[tag];
 	return NULL;
 }
 
+static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
+						     unsigned int tag)
+{
+	struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
+
+	if (unlikely(!qc) || !ap->ops->error_handler)
+		return qc;
+
+	if ((qc->flags & (ATA_QCFLAG_ACTIVE |
+			  ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
+		return qc;
+
+	return NULL;
+}
+
 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
 {
 	memset(tf, 0, sizeof(*tf));