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, 6 deletions

diff --git a/include/uapi/linux/nvgpu.h b/include/uapi/linux/nvgpu.h
index a8ba2189..e4f94c16 100644
--- a/include/uapi/linux/nvgpu.h
+++ b/include/uapi/linux/nvgpu.h
@@ -973,10 +973,6 @@ struct nvgpu_alloc_obj_ctx_args {
         __u64 obj_id;    /* output, used to free later       */
 };
 
-struct nvgpu_free_obj_ctx_args {
-        __u64 obj_id; /* obj ctx to free */
-};
-
 struct nvgpu_alloc_gpfifo_args {
         __u32 num_entries;
 #define NVGPU_ALLOC_GPFIFO_FLAGS_VPR_ENABLED    (1 << 0) /* set owner channel of this gpfifo as a vpr channel */
@@ -1216,8 +1212,6 @@ struct nvgpu_preemption_mode_args {
         _IOWR(NVGPU_IOCTL_MAGIC, 107, struct nvgpu_submit_gpfifo_args)
 #define NVGPU_IOCTL_CHANNEL_ALLOC_OBJ_CTX       \
         _IOWR(NVGPU_IOCTL_MAGIC, 108, struct nvgpu_alloc_obj_ctx_args)
-#define NVGPU_IOCTL_CHANNEL_FREE_OBJ_CTX        \
-        _IOR(NVGPU_IOCTL_MAGIC,  109, struct nvgpu_free_obj_ctx_args)
 #define NVGPU_IOCTL_CHANNEL_ZCULL_BIND          \
         _IOWR(NVGPU_IOCTL_MAGIC, 110, struct nvgpu_zcull_bind_args)
 #define NVGPU_IOCTL_CHANNEL_SET_ERROR_NOTIFIER  \