Check if a client is supported, by comparing against a whitelist, to
register for notifications from Machine Description (MDESC)
Signed-off-by: Jagannathan Raman <jag.raman@xxxxxxxxxx>
Reviewed-by: Liam Merwick <liam.merwick@xxxxxxxxxx>
Reviewed-by: Shannon Nelson <shannon.nelson@xxxxxxxxxx>
---
arch/sparc/kernel/mdesc.c | 17 +++++++++++++++++
1 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/arch/sparc/kernel/mdesc.c b/arch/sparc/kernel/mdesc.c
index 04b7626..f795ee0 100644
--- a/arch/sparc/kernel/mdesc.c
+++ b/arch/sparc/kernel/mdesc.c
@@ -284,9 +284,26 @@ void mdesc_release(struct mdesc_handle *hp)
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;
--
1.7.1
--
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