mac802154: change frame_retries behaviour

This patch changes the default minimum value of frame_retries to 0 and
changes the frame_retries default value to 3 which is also 802.15.4
default.

We don't use the frame_retries "-1" value as indicator for no-aret mode
anymore, instead we checking on the ack request bit inside the 802.15.4
frame control field. This allows a acknowledge handling per frame. This
checking is done by transceiver or inside xmit callback of driver layer.

If a transceiver doesn't support ARET handling the transmit
functionality ignores ack frames then, which isn't well but should not
effect anything of current functionality.

Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/mac802154/iface.c b/net/mac802154/iface.c
index ff99055..ed26952 100644 (file)
--- a/net/mac802154/iface.c
+++ b/net/mac802154/iface.c
@@ -498,8 +498,7 @@ ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
        wpan_dev->min_be = 3;
        wpan_dev->max_be = 5;
        wpan_dev->csma_retries = 4;
-       /* for compatibility, actual default is 3 */
-       wpan_dev->frame_retries = -1;
+       wpan_dev->frame_retries = 3;
 
        wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
        wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);

diff --git a/net/mac802154/main.c b/net/mac802154/main.c
index 9e55431..e8cab5b 100644 (file)
--- a/net/mac802154/main.c
+++ b/net/mac802154/main.c
@@ -111,7 +111,7 @@ ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops)
        phy->supported.max_minbe = 8;
        phy->supported.min_maxbe = 3;
        phy->supported.max_maxbe = 8;
-       phy->supported.min_frame_retries = -1;
+       phy->supported.min_frame_retries = 0;
        phy->supported.max_frame_retries = 7;
        phy->supported.max_csma_backoffs = 5;
        phy->supported.lbt = NL802154_SUPPORTED_BOOL_FALSE;
@@ -177,11 +177,8 @@ int ieee802154_register_hw(struct ieee802154_hw *hw)
        }
 
        if (!(hw->flags & IEEE802154_HW_FRAME_RETRIES)) {
-               /* TODO should be 3, but our default value is -1 which means
-                * no ARET handling.
-                */
-               local->phy->supported.min_frame_retries = -1;
-               local->phy->supported.max_frame_retries = -1;
+               local->phy->supported.min_frame_retries = 3;
+               local->phy->supported.max_frame_retries = 3;
        }
 
        if (hw->flags & IEEE802154_HW_PROMISCUOUS)