[v6 0/5] Fix several bugs in error handling during device probe

[Jiang Liu <gerry@linux.alibaba.com>]

This patchset tries to fix several memory leakages/invalid memory
accesses on error handling path during GPU driver loading/unloading.
They applies to:
https://gitlab.freedesktop.org/agd5f/linux.git amd-staging-drm-next

v6:
1) fix coding style of patch 5

v5:
1) drop first in v4, we have found a reliable way to fix the issue.
2) add patch 3 in v5 to fix a new issue
3) rework patch 5 according to review feedback

v4:
1) drop patch 1 in v3
2) split out amdxcp related change into a dedicated patch
3) use `guard(mutex)` instead of mutex_lock/unlock().
4) move patch 6 in v3 to next patch set

v3:
1) drop first patch of v2
2) rework the 0003/0004 patches of v2 according to review comments
3) add patch 0004 to fix possible resource leakage in amdgpu_pci_probe()

v2:
1) rebased to https://gitlab.freedesktop.org/agd5f/linux.git branch
   amd-staging-drm-next.
2) removed the first patch, which is unnecessary.
3) add amdgpu_xcp_drm_dev_free() in patch 0003 to enhance amdxcp
   driver to better support device remove and error handling.
4) reworked patch 0005 to fix it in amdgpu instead of drm core.

Jiang Liu (5):
  drm/amdxcp: introduce new API amdgpu_xcp_drm_dev_free()
  drm/amdgpu: fix use after free bug related to
    amdgpu_driver_release_kms()
  drm/amdgpu: fix invalid memory access in amdgpu_xcp_cfg_sysfs_fini()
  drm/amdgpu: enhance error handling in function amdgpu_pci_probe()
  drm/amdgpu: fix invalid memory access in amdgpu_fence_driver_sw_fini()

 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c  | 33 ++++++++--
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c     | 14 ++--
 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c   |  9 ---
 drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c     | 71 +++++++++++++++++----
 drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.h     |  3 +-
 drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c | 63 +++++++++++++++---
 drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.h |  1 +
 7 files changed, 152 insertions(+), 42 deletions(-)

-- 
2.43.5