* send: Send the bytes passed in "packet" as a packet on the wire
* recv: Check if the hardware received a packet. If so, set the pointer to the
* packet buffer in the packetp parameter. If not, return an error or 0 to
- * indicate that the hardware receive FIFO is empty
+ * indicate that the hardware receive FIFO is empty. If 0 is returned, the
+ * network stack will not process the empty packet, but free_pkt() will be
+ * called if supplied
+ * free_pkt: Give the driver an opportunity to manage its packet buffer memory
+ * when the network stack is finished processing it. This will only be
+ * called when no error was returned from recv - optional
* stop: Stop the hardware from looking for packets - may be called even if
* state == PASSIVE
* mcast: Join or leave a multicast group (for TFTP) - optional
int (*start)(struct udevice *dev);
int (*send)(struct udevice *dev, void *packet, int length);
int (*recv)(struct udevice *dev, uchar **packetp);
+ int (*free_pkt)(struct udevice *dev, uchar *packet, int length);
void (*stop)(struct udevice *dev);
#ifdef CONFIG_MCAST_TFTP
int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join);
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)