gpu: nvgpu: gr: remove only created sysfs nodes

Sysfs nodes for GR stats are created on GR init. If nvgpu
module is removed without any ops, then it tries to remove
sysfs nodes which do not exist resulting in kernel panic.
Fix this issue by removing sysfs nodes only if ecc counters
are initialized.

Bug 1987855

Change-Id: I3f967ee92ec02ad19ffbd9bfa8bace5bfd229dd2
Signed-off-by: Nitin Kumbhar <nkumbhar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1730536
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

2 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.c b/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.c
index b2d6230d..5d7ee84d 100644
--- a/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.c
+++ b/drivers/gpu/nvgpu/common/linux/platform_gp10b_tegra.c
@@ -796,6 +796,9 @@ static void gr_gp10b_remove_sysfs(struct device *dev)
 {
         struct gk20a *g = get_gk20a(dev);
 
+        if (!g->ecc.gr.sm_lrf_single_err_count.counters)
+                return;
+
         gr_gp10b_ecc_stat_remove(dev,
                         0,
                         &g->ecc.gr.sm_lrf_single_err_count,
diff --git a/drivers/gpu/nvgpu/common/linux/platform_gv11b_tegra.c b/drivers/gpu/nvgpu/common/linux/platform_gv11b_tegra.c
index 9f9d5ee1..df760478 100644
--- a/drivers/gpu/nvgpu/common/linux/platform_gv11b_tegra.c
+++ b/drivers/gpu/nvgpu/common/linux/platform_gv11b_tegra.c
@@ -502,6 +502,9 @@ static void gr_gv11b_remove_sysfs(struct device *dev)
 {
         struct gk20a *g = get_gk20a(dev);
 
+        if (!g->ecc.gr.sm_l1_tag_corrected_err_count.counters)
+                return;
+
         gr_gp10b_ecc_stat_remove(dev,
                         0,
                         &g->ecc.gr.sm_l1_tag_corrected_err_count,