1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index c1a70985abfa..af867731a5f4 100644
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -16,6 +16,14 @@
 #define QDIO_BUSY_BIT_GIVE_UP           2000000 /* 2 seconds = eternity */
 #define QDIO_INPUT_THRESHOLD            500     /* 500 microseconds */
 
+/*
+ * if an asynchronous HiperSockets queue runs full, the 10 seconds timer wait
+ * till next initiative to give transmitted skbs back to the stack is too long.
+ * Therefore polling is started in case of multicast queue is filled more
+ * than 50 percent.
+ */
+#define QDIO_IQDIO_POLL_LVL             65      /* HS multicast queue */
+
 enum qdio_irq_states {
         QDIO_IRQ_STATE_INACTIVE,
         QDIO_IRQ_STATE_ESTABLISHED,