dm: eth: Provide a way for drivers to manage packet buffers

Some drivers need a chance to manage their receive buffers after the
packet has been handled by the network stack. Add an operation that
will allow the driver to be called in that case.

Reported-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Tested-on: pcduino3

1 files changed, 3 insertions, 1 deletions

diff --git a/net/eth.c b/net/eth.c
index 13b7723..05411f1 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -344,7 +344,9 @@ int eth_rx(void)
 		ret = eth_get_ops(current)->recv(current, &packet);
 		if (ret > 0)
 			net_process_received_packet(packet, ret);
-		else
+		if (ret >= 0 && eth_get_ops(current)->free_pkt)
+			eth_get_ops(current)->free_pkt(current, packet, ret);
+		if (ret <= 0)
 			break;
 	}
 	if (ret == -EAGAIN)