This is a note to let you know that I've just added the patch titled

drm/nouveau/device: return error for unknown chipsets

to the 5.8-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summ...

The filename of the patch is: drm-nouveau-device-return-error-for-unknown-chipsets.patch and it can be found in the queue-5.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From c3e0276c31ca8c7b8615da890727481260d4676f Mon Sep 17 00:00:00 2001

From: Karol Herbst kherbst@redhat.com Date: Wed, 7 Oct 2020 00:05:27 +0200 Subject: drm/nouveau/device: return error for unknown chipsets

From: Karol Herbst kherbst@redhat.com

commit c3e0276c31ca8c7b8615da890727481260d4676f upstream.

Previously the code relied on device->pri to be NULL and to fail probing later. We really should just return an error inside nvkm_device_ctor for unsupported GPUs.

Fixes: 24d5ff40a732 ("drm/nouveau/device: rework mmio mapping code to get rid of second map")

Signed-off-by: Karol Herbst kherbst@redhat.com Cc: dann frazier dann.frazier@canonical.com Cc: dri-devel dri-devel@lists.freedesktop.org Cc: Dave Airlie airlied@redhat.com Cc: stable@vger.kernel.org Reviewed-by: Jeremy Cline jcline@redhat.com Signed-off-by: Dave Airlie airlied@redhat.com Link: https://patchwork.freedesktop.org/patch/msgid/20201006220528.13925-1-kherbst... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/gpu/drm/nouveau/nvkm/engine/device/base.c | 1 + 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c @@ -3149,6 +3149,7 @@ nvkm_device_ctor(const struct nvkm_devic case 0x168: device->chip = &nv168_chipset; break; default: nvdev_error(device, "unknown chipset (%08x)\n", boot0); + ret = -ENODEV; goto done; }

Patches currently in stable-queue which might be from kherbst@redhat.com are

queue-5.8/drm-nouveau-device-return-error-for-unknown-chipsets.patch queue-5.8/drm-nouveau-mem-guard-against-null-pointer-access-in-mem_del.patch