gpu: nvgpu: remove hard coded GPU name

In gk20a_do_idle(), to get pointer to platform_device of gk20a,
we use bus_find_device_by_name() and pass "gk20a.0" to it
But this hard coding fails on gm20b since GPU device name
there is "gpu"

Hence to fix this add a static pointer handle "gk20a_handle"
to struct gk20a in gk20a.c
Now we can access this global pointer inside do_idle()
to get gk20a pointer and from that we can get pointer to
platform_device

Change-Id: I1a65588e34ad36efed0fa587bb365f0ee81e253d
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/486887
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 8 insertions, 8 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index 3499cc89..a6a51de5 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -84,6 +84,8 @@ u32 gk20a_dbg_ftrace;
 
 #define GK20A_WAIT_FOR_IDLE_MS  2000
 
+static struct gk20a *gk20a_handle;
+
 static int gk20a_pm_finalize_poweron(struct device *dev);
 static int gk20a_pm_prepare_poweroff(struct device *dev);
 
@@ -1445,6 +1447,7 @@ static int gk20a_probe(struct platform_device *dev)
 
         set_gk20a(dev, gk20a);
         gk20a->dev = dev;
+        gk20a_handle = gk20a;
 
         gk20a->irq_stall = platform_get_irq(dev, 0);
         gk20a->irq_nonstall = platform_get_irq(dev, 1);
@@ -1600,6 +1603,7 @@ static int __exit gk20a_remove(struct platform_device *dev)
 
         gk20a_user_deinit(dev);
 
+        gk20a_handle = NULL;
         set_gk20a(dev, 0);
 #ifdef CONFIG_DEBUG_FS
         debugfs_remove(g->debugfs_ltc_enabled);
@@ -1748,10 +1752,8 @@ void gk20a_reset(struct gk20a *g, u32 units)
  */
 int gk20a_do_idle(void)
 {
-        struct platform_device *pdev = to_platform_device(
-                bus_find_device_by_name(&platform_bus_type,
-                NULL, "gk20a.0"));
-        struct gk20a *g = get_gk20a(pdev);
+        struct gk20a *g = gk20a_handle;
+        struct platform_device *pdev = g->dev;
         struct gk20a_platform *platform = dev_get_drvdata(&pdev->dev);
         unsigned long timeout = jiffies +
                 msecs_to_jiffies(GK20A_WAIT_FOR_IDLE_MS);
@@ -1831,10 +1833,8 @@ fail_timeout:
  */
 int gk20a_do_unidle(void)
 {
-        struct platform_device *pdev = to_platform_device(
-                bus_find_device_by_name(&platform_bus_type,
-                NULL, "gk20a.0"));
-        struct gk20a *g = get_gk20a(pdev);
+        struct gk20a *g = gk20a_handle;
+        struct platform_device *pdev = g->dev;
         struct gk20a_platform *platform = dev_get_drvdata(&pdev->dev);
 
         if (g->forced_reset) {