1 files changed, 9 insertions, 0 deletions
diff --git a/hw/net/smc91c111.c b/hw/net/smc91c111.c
index b18d5c2..0e13dfa 100644
--- a/hw/net/smc91c111.c
+++ b/hw/net/smc91c111.c
@@ -182,6 +182,15 @@ static void smc91c111_pop_rx_fifo(smc91c111_state *s)
 {
     int i;
 
+    if (s->rx_fifo_len == 0) {
+        /*
+         * The datasheet doesn't document what the behaviour is if the
+         * guest tries to pop an empty RX FIFO, and there's no obvious
+         * error status register to report it. Just ignore the attempt.
+         */
+        return;
+    }
+
     s->rx_fifo_len--;
     if (s->rx_fifo_len) {
         for (i = 0; i < s->rx_fifo_len; i++)