diff --git a/drivers/scsi/esas2r/esas2r.h b/drivers/scsi/esas2r/esas2r.h
index b6030e3edd016459262928c96eac923f1dd1dd8c..c5013de964e6cdcca51bae1a4de09caac2c8b39c 100644
--- a/drivers/scsi/esas2r/esas2r.h
+++ b/drivers/scsi/esas2r/esas2r.h
@@ -945,7 +945,7 @@ struct esas2r_adapter {
 	struct list_head vrq_mds_head;
 	struct esas2r_mem_desc *vrq_mds;
 	int num_vrqs;
-	struct semaphore fm_api_semaphore;
+	struct mutex fm_api_mutex;
 	struct semaphore fs_api_semaphore;
 	struct semaphore nvram_semaphore;
 	struct atto_ioctl *local_atto_ioctl;
diff --git a/drivers/scsi/esas2r/esas2r_init.c b/drivers/scsi/esas2r/esas2r_init.c
index 6432a50b26d853aaa2e6ede3f89e3d1982c42b2b..ad85b33ab6b45cf48e702caa0ff22b01cf8551c5 100644
--- a/drivers/scsi/esas2r/esas2r_init.c
+++ b/drivers/scsi/esas2r/esas2r_init.c
@@ -327,7 +327,7 @@ int esas2r_init_adapter(struct Scsi_Host *host, struct pci_dev *pcid,
 	esas2r_debug("new adapter %p, name %s", a, a->name);
 	spin_lock_init(&a->request_lock);
 	spin_lock_init(&a->fw_event_lock);
-	sema_init(&a->fm_api_semaphore, 1);
+	mutex_init(&a->fm_api_mutex);
 	sema_init(&a->fs_api_semaphore, 1);
 	sema_init(&a->nvram_semaphore, 1);
 
diff --git a/drivers/scsi/esas2r/esas2r_ioctl.c b/drivers/scsi/esas2r/esas2r_ioctl.c
index 2d4b7f049a683e841e87ecd9ae35f14f1d5a5a55..c6b041a9f007a55c2a34149402a963a6715e1f7e 100644
--- a/drivers/scsi/esas2r/esas2r_ioctl.c
+++ b/drivers/scsi/esas2r/esas2r_ioctl.c
@@ -110,7 +110,7 @@ static void do_fm_api(struct esas2r_adapter *a, struct esas2r_flash_img *fi)
 {
 	struct esas2r_request *rq;
 
-	if (down_interruptible(&a->fm_api_semaphore)) {
+	if (mutex_lock_interruptible(&a->fm_api_mutex)) {
 		fi->status = FI_STAT_BUSY;
 		return;
 	}
@@ -173,7 +173,7 @@ static void do_fm_api(struct esas2r_adapter *a, struct esas2r_flash_img *fi)
 free_req:
 	esas2r_free_request(a, (struct esas2r_request *)rq);
 free_sem:
-	up(&a->fm_api_semaphore);
+	mutex_unlock(&a->fm_api_mutex);
 	return;
 
 }