From 71c8d998d4c5a33dea9a19548af71faa6a20fca7 Mon Sep 17 00:00:00 2001
From: Shashank Singh <shashsingh@nvidia.com>
Date: Tue, 21 Jul 2020 08:55:04 +0000
Subject: [PATCH] gpu: nvgpu: return error if therm is uninitialized

If therm is not initialized then return error for getting temperature
API.

Bug 200638833
Jira NVGPU-5832

Change-Id: Iebe44218d76d39d5bf765e8de6fd74c3b64c8b68
Signed-off-by: Shashank Singh <shashsingh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2382905
Reviewed-by: Dinesh T <dt@nvidia.com>
Reviewed-by: automaticguardword <automaticguardword@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Ramesh Mylavarapu <rmylavarapu@nvidia.com>
Reviewed-by: Vaibhav Kachore <vkachore@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
---
 drivers/gpu/nvgpu/common/pmu/therm/therm_channel.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/nvgpu/common/pmu/therm/therm_channel.c b/drivers/gpu/nvgpu/common/pmu/therm/therm_channel.c
index 3aad7f729..d959a0015 100644
--- a/drivers/gpu/nvgpu/common/pmu/therm/therm_channel.c
+++ b/drivers/gpu/nvgpu/common/pmu/therm/therm_channel.c
@@ -337,6 +337,10 @@ static int therm_channel_boardobj_grp_get_status(struct gk20a *g)
 
 	nvgpu_log_info(g, " ");
 
+	if (g->pmu->therm_pmu == NULL) {
+		return -EINVAL;
+	}
+
 	pboardobjgrp = &g->pmu->therm_pmu->therm_channelobjs.super.super;
 	pboardobjgrpmask = &g->pmu->therm_pmu->therm_channelobjs.super.mask.super;
 	status = pboardobjgrp->pmugetstatus(g, pboardobjgrp, pboardobjgrpmask);