[Bug 213751] New: KVM virt w/ qxl fails boot at latest 5.14.0-rc1+

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=213751

            Bug ID: 213751
           Summary: KVM virt w/ qxl fails boot at latest 5.14.0-rc1+
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.14.0-rc1+
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: jpittman at redhat.com
        Regression: No

KVM virt w/ qxl fails boot at latest 5.14.0-rc1+

Limited backtrace:

RIP: 0010:qxl_bo_move_notify.part.1+0xc/0x40 [qxl]
ttm_bo_cleanup_memtype_use+0x22/0x60 [ttm]
ttm_bo_release+0x1b0/0x310 [ttm]

Issue bisected to the below commit.

[root at localhost linux]# git bisect bad
bfa3357ef9abc9d56a2910222d2deeb9f15c91ff is the first bad commit
commit bfa3357ef9abc9d56a2910222d2deeb9f15c91ff
Author: Christian König <christian.koenig at amd.com>
Date:   Thu Apr 15 09:52:58 2021 +0200

    drm/ttm: allocate resource object instead of embedding it v2

    To improve the handling we want the establish the resource object as base
    class for the backend allocations.

    v2: add missing error handling

    Signed-off-by: Christian König <christian.koenig at amd.com>
    Acked-by: Thomas Hellström <thomas.hellstrom at linux.intel.com>
    Link:
https://patchwork.freedesktop.org/patch/msgid/20210602100914.46246-1-christian.koenig@amd.com

 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c |  4 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c    | 54 +++++++++----------
 drivers/gpu/drm/nouveau/nouveau_bo.c       |  2 +-
 drivers/gpu/drm/radeon/radeon_ttm.c        |  2 +-
 drivers/gpu/drm/ttm/ttm_bo.c               | 83 ++++++++++--------------------
 drivers/gpu/drm/ttm/ttm_bo_util.c          | 43 ++++++++--------
 drivers/gpu/drm/ttm/ttm_resource.c         | 31 ++++++++---
 drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c |  2 +-
 include/drm/ttm/ttm_bo_api.h               |  1 -
 include/drm/ttm/ttm_bo_driver.h            | 10 ++--
 include/drm/ttm/ttm_resource.h             |  4 +-
 11 files changed, 110 insertions(+), 126 deletions(-)

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