From: Lucas Stach Date: Fri, 20 Aug 2021 20:18:28 +0000 (+0200) Subject: drm/etnaviv: fix MMU context leak on GPU reset X-Git-Tag: v5.15-rc2~28^2~2^2~2 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=f978a5302f5566480c58ffae64a16d34456801bd;p=linux-2.6-block.git drm/etnaviv: fix MMU context leak on GPU reset 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@vger.kernel.org # 5.4 Reported-by: Michael Walle Signed-off-by: Lucas Stach Tested-by: Michael Walle Tested-by: Marek Vasut Reviewed-by: Christian Gmeiner --- diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c index 3d64bc3cc604..bc2bdfcbc082 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -571,6 +571,8 @@ static int etnaviv_hw_reset(struct etnaviv_gpu *gpu) 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;