mac802154: remove aack hw flag

This patch removes the hardware auto acknowdledge flag which indicates
that the transceiver supports this handling. This flag is never
evaluated inside mac802154 and all transceivers should support this
handling by default per hardware.

Suggested-by: Lennert Buytenhek <buytenh@wantstofly.org>
Cc: Alan Ott <alan@signal11.us>
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Reviewed-by: Varka Bhadram <varkabhadram@gmail.com>
Acked-by: Stefan Schmidt <stefan@osg.samsung.com>
Acked-by: Varka Bhadram <varkabhadram@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/net/ieee802154/at86rf230.c

@@ -1443,7 +1443,7 @@ at86rf230_detect_device(struct at86rf230_local *lp)
 		return -EINVAL;
 	}
 
-	lp->hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AACK |
+	lp->hw->flags = IEEE802154_HW_TX_OMIT_CKSUM |
 			IEEE802154_HW_CSMA_PARAMS |
 			IEEE802154_HW_FRAME_RETRIES | IEEE802154_HW_AFILT |
 			IEEE802154_HW_PROMISCUOUS;

drivers/net/ieee802154/atusb.c

@@ -628,7 +628,7 @@ static int atusb_probe(struct usb_interface *interface,
 
 	hw->parent = &usb_dev->dev;
 	hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT |
-		    IEEE802154_HW_AACK | IEEE802154_HW_PROMISCUOUS;
+		    IEEE802154_HW_PROMISCUOUS;
 
 	hw->phy->flags = WPAN_PHY_FLAG_TXPOWER;
 

drivers/net/ieee802154/cc2520.c

@@ -746,8 +746,7 @@ static int cc2520_register(struct cc2520_private *priv)
 
 	/* We do support only 2.4 Ghz */
 	priv->hw->phy->supported.channels[0] = 0x7FFF800;
-	priv->hw->flags = IEEE802154_HW_OMIT_CKSUM | IEEE802154_HW_AACK |
-			  IEEE802154_HW_AFILT;
+	priv->hw->flags = IEEE802154_HW_OMIT_CKSUM | IEEE802154_HW_AFILT;
 
 	priv->hw->phy->flags = WPAN_PHY_FLAG_TXPOWER;
 

drivers/net/ieee802154/mrf24j40.c

@@ -751,8 +751,7 @@ static int mrf24j40_probe(struct spi_device *spi)
 	devrec->hw->priv = devrec;
 	devrec->hw->parent = &devrec->spi->dev;
 	devrec->hw->phy->supported.channels[0] = CHANNEL_MASK;
-	devrec->hw->flags = IEEE802154_HW_OMIT_CKSUM | IEEE802154_HW_AACK |
-			    IEEE802154_HW_AFILT;
+	devrec->hw->flags = IEEE802154_HW_OMIT_CKSUM | IEEE802154_HW_AFILT;
 
 	dev_dbg(printdev(devrec), "registered mrf24j40\n");
 	ret = ieee802154_register_hw(devrec->hw);

include/net/mac802154.h

@@ -90,8 +90,6 @@ struct ieee802154_hw {
 
 /* Indicates that xmitter will add FCS on it's own. */
 #define IEEE802154_HW_TX_OMIT_CKSUM	0x00000001
-/* Indicates that receiver will autorespond with ACK frames. */
-#define IEEE802154_HW_AACK		0x00000002
 /* Indicates that transceiver will support listen before transmit. */
 #define IEEE802154_HW_LBT		0x00000004
 /* Indicates that transceiver will support csma (max_be, min_be, csma retries)