gpu: nvgpu: Remove IOCTL FREE_OBJ_CTX

We have never used the IOCTL FREE_OBJ_CTX. Using it leads to context
being only partially available, and can lead to use-after-free.

Bug 1834225

Change-Id: I9d2b632ab79760f8186d02e0f35861b3a6aae649
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1250004
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 0 insertions, 12 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
index 53ed606d..43a6df0e 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
@@ -3467,18 +3467,6 @@ long gk20a_channel_ioctl(struct file *filp,
                                 (struct nvgpu_alloc_obj_ctx_args *)buf);
                 gk20a_idle(dev);
                 break;
-        case NVGPU_IOCTL_CHANNEL_FREE_OBJ_CTX:
-                err = gk20a_busy(dev);
-                if (err) {
-                        dev_err(dev,
-                                "%s: failed to host gk20a for ioctl cmd: 0x%x",
-                                __func__, cmd);
-                        break;
-                }
-                err = ch->g->ops.gr.free_obj_ctx(ch,
-                                (struct nvgpu_free_obj_ctx_args *)buf);
-                gk20a_idle(dev);
-                break;
         case NVGPU_IOCTL_CHANNEL_ALLOC_GPFIFO_EX:
         {
                 struct nvgpu_alloc_gpfifo_ex_args *alloc_gpfifo_ex_args =