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Commit 3646eab6 authored by Chris Lew's avatar Chris Lew
Browse files

net: qrtr: Send BYE message for all nodes on ept 



An ept can represent multiple nodes in a system. If an ept unregisters,
qrtr should send a BYE control message for all the nodes that it
represents. Iterate through the node tree to find all the nodes that
belong to the ept.

Change-Id: Ia0b1573274e07d2f94092bd464105bc6ebca5ef8
Signed-off-by: default avatarChris Lew <clew@codeaurora.org>
parent a0b74a09

net/qrtr/qrtr.c

+13 −2
Original line number Diff line number Diff line
@@ -708,22 +708,33 @@ EXPORT_SYMBOL_GPL(qrtr_endpoint_register); 
 */

void qrtr_endpoint_unregister(struct qrtr_endpoint *ep)

{

	struct radix_tree_iter iter;

	struct qrtr_node *node = ep->node;

	struct sockaddr_qrtr src = {AF_QIPCRTR, node->nid, QRTR_PORT_CTRL};

	struct sockaddr_qrtr dst = {AF_QIPCRTR, qrtr_local_nid, QRTR_PORT_CTRL};

	struct qrtr_ctrl_pkt *pkt;

	struct sk_buff *skb;

	void __rcu **slot;



	mutex_lock(&node->ep_lock);

	node->ep = NULL;

	mutex_unlock(&node->ep_lock);



	/* Notify the local controller about the event */

	down_read(&qrtr_node_lock);

	radix_tree_for_each_slot(slot, &qrtr_nodes, &iter, 0) {

		if (node != *slot)

			continue;



		skb = qrtr_alloc_ctrl_packet(&pkt);

	if (skb) {

		if (!skb)

			continue;



		src.sq_node = iter.index;

		pkt->cmd = cpu_to_le32(QRTR_TYPE_BYE);

		qrtr_local_enqueue(NULL, skb, QRTR_TYPE_BYE, &src, &dst);

	}

	up_read(&qrtr_node_lock);



	/* Wake up any transmitters waiting for resume-tx from the node */

	wake_up_interruptible_all(&node->resume_tx);