From: Lucas Stach <l.stach@xxxxxxxxxxxxxx> commit f978a5302f5566480c58ffae64a16d34456801bd upstream. After a reset the GPU is no longer using the MMU context and may be restarted with a different context. While the mmu_state proeprly was cleared, the context wasn't unreferenced, leading to a memory leak. Cc: stable@xxxxxxxxxxxxxxx # 5.4 Reported-by: Michael Walle <michael@xxxxxxxx> Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx> Tested-by: Michael Walle <michael@xxxxxxxx> Tested-by: Marek Vasut <marex@xxxxxxx> Reviewed-by: Christian Gmeiner <christian.gmeiner@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -547,6 +547,8 @@ static int etnaviv_hw_reset(struct etnav gpu->fe_running = false; gpu->exec_state = -1; + if (gpu->mmu_context) + etnaviv_iommu_context_put(gpu->mmu_context); gpu->mmu_context = NULL; return 0;
