[PATCH] PM: EM: do not allow pd creation prior to debugfs initialization

[Lingutla Chandrasekhar]

em_dev_register_perf_domain() can be called from any initcall level before
debugfs initialization, this allowed to create power domain debug entries
of the caller at unintended root_dir.

Fix it by not allowing creation of power domain debug entries, if root_dir
is not available.

Signed-off-by: Lingutla Chandrasekhar <clingutla@xxxxxxxxxxxxxx>

diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c
index a332ccd829e2..fe5a207d4023 100644
--- a/kernel/power/energy_model.c
+++ b/kernel/power/energy_model.c
@@ -68,6 +68,11 @@ static void em_debug_create_pd(struct device *dev)
 	struct dentry *d;
 	int i;
 
+	if (!rootdir) {
+		pr_err("EM: energy_model debug is not available yet\n");
+		return;
+	}
+
 	/* Create the directory of the performance domain */
 	d = debugfs_create_dir(dev_name(dev), rootdir);
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
 a Linux Foundation Collaborative Project.