1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index d2b094d9c34f..504c9219961c 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -189,6 +189,10 @@ struct zfcp_fsf_req *zfcp_reqlist_ismember(struct zfcp_adapter *adapter,
         struct zfcp_fsf_req *request, *tmp;
         unsigned int i;
 
+        /* 0 is reserved as an invalid req_id */
+        if (req_id == 0)
+                return NULL;
+
         i = req_id % REQUEST_LIST_SIZE;
 
         list_for_each_entry_safe(request, tmp, &adapter->req_list[i], list)