diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 11df827..66df895 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -5189,6 +5189,7 @@
 
 	INIT_WORK(&ap->port_task, NULL, NULL);
 	INIT_LIST_HEAD(&ap->eh_done_q);
+	init_waitqueue_head(&ap->eh_wait_q);
 
 	/* set cable type */
 	ap->cbl = ATA_CBL_NONE;