diff --git a/drivers/scsi/sata_qstor.c b/drivers/scsi/sata_qstor.c
index 2926846cdd6a..93fd06fb4f15 100644
--- a/drivers/scsi/sata_qstor.c
+++ b/drivers/scsi/sata_qstor.c
@@ -198,7 +198,7 @@ static int qs_check_atapi_dma(struct ata_queued_cmd *qc)
 	return 1;	/* ATAPI DMA not supported */
 }
 
-static void qs_bmdma_stop(struct ata_queud_cmd *qc)
+static void qs_bmdma_stop(struct ata_queued_cmd *qc)
 {
 	/* nothing */
 }
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 33f3ab4eb827..7c09540c52bc 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -424,7 +424,6 @@ extern unsigned int ata_dev_classify(struct ata_taskfile *tf);
 extern void ata_dev_id_string(u16 *id, unsigned char *s,
 			      unsigned int ofs, unsigned int len);
 extern void ata_dev_config(struct ata_port *ap, unsigned int i);
-extern void ata_dev_set_protocol(struct ata_device *dev);
 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);