diff options
| author | Jag Raman <jag.raman@oracle.com> | 2017-06-23 14:58:37 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-06-25 13:43:14 -0700 |
| commit | 110f2264b37674e99057acd249a930040fad55b1 (patch) | |
| tree | dfcd031ed4fb83a2c456c86e1b29d6c3f0d6587f /arch/sparc | |
| parent | 0542eb7de7d5244d159f827a0c9bd8c01792bd13 (diff) | |
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: Jagannathan Raman <jag.raman@oracle.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
| -rw-r--r-- | 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 04b76267ddfa..f795ee015738 100644 --- a/arch/sparc/kernel/mdesc.c +++ b/arch/sparc/kernel/mdesc.c @@ -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; |