mrf24j40: Enable link-layer acknowledgement and retry

On the MRF24J40, link-layer acknowledgment request and retry must be
turned on explicitly for each packet.  Turn this on in the hardware based
on the FC_ACK_REQ bit being set in the packet.

Also, now that failure to receive an ACK will cause the hardware to report
failure of transmission, change the log level for this failure to debug
level.

Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c
index ca0035116a188cf67f1520a52dd520caa18ec1a4..3d3c529e76ec29a7803124f53117ee38f123a45d 100644 (file)
--- a/drivers/net/ieee802154/mrf24j40.c
+++ b/drivers/net/ieee802154/mrf24j40.c
@@ -25,6 +25,7 @@
 #include <linux/pinctrl/consumer.h>
 #include <net/wpan-phy.h>
 #include <net/mac802154.h>
+#include <net/ieee802154.h>
 
 /* MRF24J40 Short Address Registers */
 #define REG_RXMCR    0x00  /* Receive MAC control */
@@ -349,7 +350,9 @@ static int mrf24j40_tx(struct ieee802154_dev *dev, struct sk_buff *skb)
        if (ret)
                goto err;
        val |= 0x1;
-       val &= ~0x4;
+       /* Set TXNACKREQ if the ACK bit is set in the packet. */
+       if (skb->data[0] & IEEE802154_FC_ACK_REQ)
+               val |= 0x4;
        write_short_reg(devrec, REG_TXNCON, val);
 
        INIT_COMPLETION(devrec->tx_complete);
@@ -371,7 +374,7 @@ static int mrf24j40_tx(struct ieee802154_dev *dev, struct sk_buff *skb)
        if (ret)
                goto err;
        if (val & 0x1) {
-               dev_err(printdev(devrec), "Error Sending. Retry count exceeded\n");
+               dev_dbg(printdev(devrec), "Error Sending. Retry count exceeded\n");
                ret = -ECOMM; /* TODO: Better error code ? */
        } else
                dev_dbg(printdev(devrec), "Packet Sent\n");