at86rf230: asynchronous xmit handling

This patch converts the sync xmit handling into an async xmit handling. The
driver was already prepared for this step, all other drivers need more
work to implement a xmit_async function.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/net/ieee802154/at86rf230.c

@@ -91,7 +91,6 @@ struct at86rf230_local {
 	bool is_tx;
 	/* spinlock for is_tx protection */
 	spinlock_t lock;
-	struct completion tx_complete;
 	struct sk_buff *tx_skb;
 	struct at86rf230_state_change tx;
 };
@@ -452,6 +451,7 @@ at86rf230_async_error_recover(void *context)
 	struct at86rf230_local *lp = ctx->lp;
 
 	at86rf230_async_state_change(lp, ctx, STATE_RX_AACK_ON, NULL, false);
+	ieee802154_wake_queue(lp->hw);
 }
 
 static void
@@ -715,9 +715,23 @@ at86rf230_tx_complete(void *context)
 {
 	struct at86rf230_state_change *ctx = context;
 	struct at86rf230_local *lp = ctx->lp;
+	struct sk_buff *skb = lp->tx_skb;
 
 	enable_irq(lp->spi->irq);
-	complete(&lp->tx_complete);
+
+	if (lp->max_frame_retries <= 0) {
+		/* Interfame spacing time, which is phy depend.
+		 * TODO
+		 * Move this handling in MAC 802.15.4 layer.
+		 * This is currently a workaround to avoid fragmenation issues.
+		 */
+		if (skb->len > 18)
+			udelay(lp->data->t_lifs);
+		else
+			udelay(lp->data->t_sifs);
+	}
+
+	ieee802154_xmit_complete(lp->hw, skb);
 }
 
 static void
@@ -975,7 +989,6 @@ at86rf230_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
 	struct at86rf230_state_change *ctx = &lp->tx;
 
 	void (*tx_complete)(void *context) = at86rf230_write_frame;
-	int rc;
 
 	lp->tx_skb = skb;
 
@@ -988,26 +1001,6 @@ at86rf230_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
 
 	at86rf230_async_state_change(lp, ctx, STATE_TX_ON, tx_complete, false);
 
-	rc = wait_for_completion_interruptible_timeout(&lp->tx_complete,
-						       msecs_to_jiffies(lp->data->t_tx_timeout));
-	if (!rc) {
-		at86rf230_async_error(lp, ctx, -ETIMEDOUT);
-		return -ETIMEDOUT;
-	}
-
-	if (lp->max_frame_retries > 0)
-		return 0;
-
-	/* Interfame spacing time, which is phy depend.
-	 * TODO
-	 * Move this handling in MAC 802.15.4 layer.
-	 * This is currently a workaround to avoid fragmenation issues.
-	 */
-	if (skb->len > 18)
-		usleep_range(lp->data->t_lifs, lp->data->t_lifs + 10);
-	else
-		usleep_range(lp->data->t_sifs, lp->data->t_sifs + 10);
-
 	return 0;
 }
 
@@ -1237,7 +1230,7 @@ at86rf230_set_frame_retries(struct ieee802154_hw *hw, s8 retries)
 
 static struct ieee802154_ops at86rf230_ops = {
 	.owner = THIS_MODULE,
-	.xmit_sync = at86rf230_xmit,
+	.xmit_async = at86rf230_xmit,
 	.ed = at86rf230_ed,
 	.set_channel = at86rf230_channel,
 	.start = at86rf230_start,
@@ -1541,7 +1534,6 @@ static int at86rf230_probe(struct spi_device *spi)
 		goto free_dev;
 
 	spin_lock_init(&lp->lock);
-	init_completion(&lp->tx_complete);
 	init_completion(&lp->state_complete);
 
 	spi_set_drvdata(spi, lp);