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Commit 110f2264 authored by Jag Raman's avatar Jag Raman Committed by David S. Miller
Browse files

sparc64: check if a client is allowed to register for MDESC notifications 



Check if a client is supported, by comparing against a whitelist, to
register for notifications from Machine Description (MDESC)

Signed-off-by: default avatarJagannathan Raman <jag.raman@oracle.com>
Reviewed-by: default avatarLiam Merwick <liam.merwick@oracle.com>
Reviewed-by: default avatarShannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0542eb7d

arch/sparc/kernel/mdesc.c

+17 −0
Original line number Diff line number Diff line
@@ -284,9 +284,26 @@ static struct mdesc_notifier_client *client_list; 


void mdesc_register_notifier(struct mdesc_notifier_client *client)

{

	bool supported = false;

	u64 node;

	int i;



	mutex_lock(&mdesc_mutex);



	/* check to see if the node is supported for registration */

	for (i = 0; md_node_ops_table[i].name != NULL; i++) {

		if (strcmp(md_node_ops_table[i].name, client->node_name) == 0) {

			supported = true;

			break;

		}

	}



	if (!supported) {

		pr_err("MD: %s node not supported\n", client->node_name);

		mutex_unlock(&mdesc_mutex);

		return;

	}



	client->next = client_list;

	client_list = client;