diff --git a/drivers/scsi/sr_ioctl.c b/drivers/scsi/sr_ioctl.c
index d92ff51..291236e 100644
--- a/drivers/scsi/sr_ioctl.c
+++ b/drivers/scsi/sr_ioctl.c
@@ -309,6 +309,11 @@
 	if (0 == sr_test_unit_ready(cd->device, &sshdr))
 		return CDS_DISC_OK;
 
+	/* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */
+	if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
+			&& sshdr.asc == 0x04 && sshdr.ascq == 0x01)
+		return CDS_DRIVE_NOT_READY;
+
 	if (!cdrom_get_media_event(cdi, &med)) {
 		if (med.media_present)
 			return CDS_DISC_OK;