The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

Possible dependencies:

631945e04e1e ("drm/amdgpu: always register an MMU notifier for userptr")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 631945e04e1e243a503089f4487cad797476e8ca Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Christian=20K=C3=B6nig?= christian.koenig@amd.com Date: Wed, 9 Nov 2022 12:14:44 +0100 Subject: [PATCH] drm/amdgpu: always register an MMU notifier for userptr MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

Since switching to HMM we always need that because we no longer grab references to the pages.

Signed-off-by: Christian König christian.koenig@amd.com Reviewed-by: Alex Deucher alexander.deucher@amd.com Acked-by: Felix Kuehling Felix.Kuehling@amd.com CC: stable@vger.kernel.org Signed-off-by: Alex Deucher alexander.deucher@amd.com

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c index 8ef31d687ef3..111484ceb47d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c @@ -413,11 +413,9 @@ int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data, if (r) goto release_object;

- if (args->flags & AMDGPU_GEM_USERPTR_REGISTER) { - r = amdgpu_mn_register(bo, args->addr); - if (r) - goto release_object; - } + r = amdgpu_mn_register(bo, args->addr); + if (r) + goto release_object;

if (args->flags & AMDGPU_GEM_USERPTR_VALIDATE) { r = amdgpu_ttm_tt_get_user_pages(bo, bo->tbo.ttm->pages);