gpu: nvgpu: fix kernel memory leak in pmu remove support

When unbinding the driver, secure pmu firmware was not freed
in nvgpu_remove_pmu_support(). Free related firmware if
previously allocated.

JIRA EVLR-1959
Bug 200352099

Change-Id: If9e431964837b3233ec25931b2ab61da920e5540
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1582909
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gp106/acr_gp106.c b/drivers/gpu/nvgpu/gp106/acr_gp106.c
index d17d5751..d7b09220 100644
--- a/drivers/gpu/nvgpu/gp106/acr_gp106.c
+++ b/drivers/gpu/nvgpu/gp106/acr_gp106.c
@@ -175,8 +175,10 @@ release_sig:
         nvgpu_release_firmware(g, pmu_sig);
 release_desc:
         nvgpu_release_firmware(g, pmu_desc);
+        g->acr.pmu_desc = NULL;
 release_img_fw:
         nvgpu_release_firmware(g, pmu_fw);
+        g->acr.pmu_fw = NULL;
         return err;
 }