From: Felix Kuehling Felix.Kuehling@amd.com

[ Upstream commit c897934da15f182ce99536007f8ef61c4748c07e ]

Release dmabuf reference before returning from kfd_ioctl_import_dmabuf. amdgpu_amdkfd_gpuvm_import_dmabuf takes a reference to the underlying GEM BO and doesn't keep the reference to the dmabuf wrapper.

Signed-off-by: Felix Kuehling Felix.Kuehling@amd.com Reviewed-by: Kent Russell kent.russell@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index e9b96ad3d9a52..fdad4d108dd36 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -1729,6 +1729,7 @@ static int kfd_ioctl_import_dmabuf(struct file *filep, }

mutex_unlock(&p->mutex); + dma_buf_put(dmabuf);

args->handle = MAKE_HANDLE(args->gpu_id, idr_handle);

@@ -1738,6 +1739,7 @@ static int kfd_ioctl_import_dmabuf(struct file *filep, amdgpu_amdkfd_gpuvm_free_memory_of_gpu(dev->kgd, (struct kgd_mem *)mem, NULL); err_unlock: mutex_unlock(&p->mutex); + dma_buf_put(dmabuf); return r; }