gpu: nvgpu: add gk20a_scale_exit()

When removing the module, remove the device from devfreq and free
resources allocated when scaling is initialized.

Bug 1476801

Change-Id: I7bb0f8112a5bf7e5ce2fc56cf8af7059d910002c
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/594444
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

3 files changed, 26 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index 3d887d85..7b0db427 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -1460,6 +1460,9 @@ static int __exit gk20a_remove(struct platform_device *dev)
                 cfb_remove_device(&dev->dev);
 #endif
 
+        if (IS_ENABLED(CONFIG_GK20A_DEVFREQ))
+                gk20a_scale_exit(dev);
+
         if (g->remove_support)
                 g->remove_support(dev);
 
diff --git a/drivers/gpu/nvgpu/gk20a/gk20a_scale.c b/drivers/gpu/nvgpu/gk20a/gk20a_scale.c
index d09a18f8..7efd07bf 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a_scale.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a_scale.c
@@ -312,6 +312,28 @@ err_get_freqs:
         g->scale_profile = NULL;
 }
 
+void gk20a_scale_exit(struct platform_device *pdev)
+{
+        struct gk20a_platform *platform = platform_get_drvdata(pdev);
+        struct gk20a *g = platform->g;
+        int err;
+
+        if (platform->qos_id < PM_QOS_NUM_CLASSES &&
+            platform->qos_id != PM_QOS_RESERVED &&
+            platform->postscale) {
+                pm_qos_remove_notifier(platform->qos_id,
+                                &g->scale_profile->qos_notify_block);
+        }
+
+        if (platform->devfreq_governor) {
+                err = devfreq_remove_device(g->devfreq);
+                g->devfreq = NULL;
+        }
+
+        kfree(g->scale_profile);
+        g->scale_profile = NULL;
+}
+
 /*
  * gk20a_scale_hw_init(dev)
  *
diff --git a/drivers/gpu/nvgpu/gk20a/gk20a_scale.h b/drivers/gpu/nvgpu/gk20a/gk20a_scale.h
index 81c23b68..5a9eff97 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a_scale.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a_scale.h
@@ -35,6 +35,7 @@ struct gk20a_scale_profile {
 
 /* Initialization and de-initialization for module */
 void gk20a_scale_init(struct platform_device *);
+void gk20a_scale_exit(struct platform_device *);
 void gk20a_scale_hw_init(struct platform_device *pdev);
 
 #ifdef CONFIG_GK20A_DEVFREQ