cadence_gem: Flush queued packets

The device needs to check for queued RX packets when the RX path is re-enabled.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 1fa8c88a3b7c654886d0a7484c2463cd4c2a2781.1360901435.git.peter.crosthwaite@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/cadence_gem.c

diff --git a/hw/cadence_gem.c b/hw/cadence_gem.c
index ab86c17..e6032ea 100644
--- a/hw/cadence_gem.c
+++ b/hw/cadence_gem.c
@@ -1106,6 +1106,9 @@
             /* Reset to start of Q when receive disabled. */
             s->rx_desc_addr = s->regs[GEM_RXQBASE];
         }
+        if (val & GEM_NWCTRL_RXENA) {
+            qemu_flush_queued_packets(qemu_get_queue(s->nic));
+        }
         break;
 
     case GEM_TXSTATUS: