[PATCH v2 5.10.y 5.15.y 6.1.y] net: qrtr: ns: Raise node count limit to 512

The current node limit of 64 breaks the functionality for a number of AI200
deployments that have up to 384 nodes. Raise the limit to 512.

Also, the backport of commit 27d5e84e810b ("net: qrtr: ns: Limit the total
number of nodes") to 5.10, 5.15 and 6.1 dropped the node_count-- hunk in
ctrl_cmd_bye(). Add it back.

Fixes: 27d5e84e810b ("net: qrtr: ns: Limit the total number of nodes")
Cc: [email protected]
Signed-off-by: Youssef Samir <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
(cherry picked from commit ff194cffd586cbd4cc49eccb002c65f2a902a277)
Signed-off-by: Youssef Samir <[email protected]>
---
Changes in v2:
- Add the missing node_count--; hunk in ctrl_cmd_bye().
- Link to v1: https://lore.kernel.org/all/[email protected]
---
 net/qrtr/ns.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/qrtr/ns.c b/net/qrtr/ns.c
index 559aad0e3621..0b8958b45bf0 100644
--- a/net/qrtr/ns.c
+++ b/net/qrtr/ns.c
@@ -79,11 +79,11 @@ struct qrtr_node {
  * requirements. If the requirement changes in the future, these values can be
  * increased.
  */
-#define QRTR_NS_MAX_NODES   64
+#define QRTR_NS_MAX_NODES   512
 #define QRTR_NS_MAX_SERVERS 256
 #define QRTR_NS_MAX_LOOKUPS 64
 
-static u8 node_count;
+static u16 node_count;
 
 static struct qrtr_node *node_get(unsigned int node_id)
 {
@@ -406,6 +406,7 @@ static int ctrl_cmd_bye(struct sockaddr_qrtr *from)
 delete_node:
 	xa_erase(&nodes, from->sq_node);
 	kfree(node);
+	node_count--;
 
 	return ret;
 }
-- 
2.43.0