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net: qrtr: Improve qrtr_node_assign

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First check if the node is already assigned the requested nid, this
allows an early exit for the common case.

Do not allow later nodes to overwrite a node id. The first to claim a
node id should get priority.

Change-Id: Ie3da0c3b709de8c68f9918cd485492f9eaa41247
Signed-off-by: Chris Lew <quic_clew@quicinc.com>
This commit is contained in:
Chris Lew 2022-10-03 09:58:06 -07:00
parent 8fa3203fdc
commit e00d15abf5
1 changed files with 4 additions and 2 deletions
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6
net/qrtr/af_qrtr.c
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@ -457,11 +457,13 @@ static void qrtr_node_assign(struct qrtr_node *node, unsigned int nid)
{
unsigned long flags;
if (nid == QRTR_EP_NID_AUTO)
if (nid == node->nid || nid == QRTR_EP_NID_AUTO)
return;
spin_lock_irqsave(&qrtr_nodes_lock, flags);
radix_tree_insert(&qrtr_nodes, nid, node);
if (!radix_tree_lookup(&qrtr_nodes, nid))
radix_tree_insert(&qrtr_nodes, nid, node);
if (node->nid == QRTR_EP_NID_AUTO)
node->nid = nid;
spin_unlock_irqrestore(&qrtr_nodes_lock, flags);