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3fd34ac02a
linux/drivers/gpu/drm
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Hang Yuan 3fd34ac02a drm/i915/gvt: fix cleanup sequence in intel_gvt_clean_device 
Create one vGPU and then unbind IGD device from i915 driver. The following
oops will happen. This patch will free vgpu resource first and then gvt
resource to remove these oops.

BUG: unable to handle kernel NULL pointer dereference at       00000000000000a8
  PGD 80000003c9d2c067 P4D 80000003c9d2c067 PUD 3c817c067 P      MD 0
  Oops: 0002 [#1] SMP PTI
  RIP: 0010:down_write+0x1b/0x40
Call Trace:
  debugfs_remove_recursive+0x46/0x1a0
  intel_gvt_debugfs_remove_vgpu+0x15/0x30 [i915]
  intel_gvt_destroy_vgpu+0x2d/0xf0 [i915]
  intel_vgpu_remove+0x2c/0x30 [kvmgt]
  mdev_device_remove_ops+0x23/0x50 [mdev]
  mdev_device_remove+0xdb/0x190 [mdev]
  mdev_device_remove+0x190/0x190 [mdev]
  device_for_each_child+0x47/0x90
  mdev_unregister_device+0xd5/0x120 [mdev]
  intel_gvt_clean_device+0x91/0x120 [i915]
  i915_driver_unload+0x9d/0x120 [i915]
  i915_pci_remove+0x15/0x20 [i915]
  pci_device_remove+0x3b/0xc0
  device_release_driver_internal+0x157/0x230
  unbind_store+0xfc/0x150
  kernfs_fop_write+0x10f/0x180
  __vfs_write+0x36/0x180
  ? common_file_perm+0x41/0x130
  ? _cond_resched+0x16/0x40
  vfs_write+0xb3/0x1a0
  ksys_write+0x52/0xc0
  do_syscall_64+0x55/0x100
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: unable to handle kernel NULL pointer dereference at 0      000000000000038
  PGD 8000000405bce067 P4D 8000000405bce067 PUD 405bcd067 PM      D 0
  Oops: 0000 [#1] SMP PTI
  RIP: 0010:hrtimer_active+0x5/0x40
Call Trace:
  hrtimer_try_to_cancel+0x25/0x120
  ? tbs_sched_clean_vgpu+0x1f/0x50 [i915]
  hrtimer_cancel+0x15/0x20
  intel_gvt_destroy_vgpu+0x4c/0xf0 [i915]
  intel_vgpu_remove+0x2c/0x30 [kvmgt]
  mdev_device_remove_ops+0x23/0x50 [mdev]
  mdev_device_remove+0xdb/0x190 [mdev]
  ? mdev_device_remove+0x190/0x190 [mdev]
  device_for_each_child+0x47/0x90
  mdev_unregister_device+0xd5/0x120 [mdev]
  intel_gvt_clean_device+0x89/0x120 [i915]
  i915_driver_unload+0x9d/0x120 [i915]
  i915_pci_remove+0x15/0x20 [i915]
  pci_device_remove+0x3b/0xc0
  device_release_driver_internal+0x157/0x230
  unbind_store+0xfc/0x150
  kernfs_fop_write+0x10f/0x180
  __vfs_write+0x36/0x180
  ? common_file_perm+0x41/0x130
  ? _cond_resched+0x16/0x40
  vfs_write+0xb3/0x1a0
  ksys_write+0x52/0xc0
  do_syscall_64+0x55/0x100
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: bc7b0be316ae("drm/i915/gvt: Add basic debugfs infrastructure")
Fixes: afe04fbe6c52("drm/i915/gvt: create an idle vGPU")
Signed-off-by: Hang Yuan <hang.yuan@linux.intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
2018-08-14 15:25:32 +08:00
..
amd BackMerge v4.18-rc7 into drm-next 2018-07-30 10:39:22 +10:00
arc drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
arm drm: mali-dp: Set encoder possible_clones 2018-07-23 15:42:17 +01:00
armada drm/armada: remove obsolete fb unreferencing kfifo and workqueue 2018-07-30 11:53:06 +01:00
ast drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
atmel-hlcdc Merge v4.18-rc3 into drm-next 2018-07-04 10:27:12 +10:00
bochs drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
bridge BackMerge v4.18-rc7 into drm-next 2018-07-30 10:39:22 +10:00
cirrus drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
etnaviv BackMerge v4.18-rc7 into drm-next 2018-07-30 10:39:22 +10:00
exynos drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
fsl-dcu drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
gma500 drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
hisilicon drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
i2c drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
i810 drm/i810: off by one in i810_dma_vertex() 2018-07-03 15:00:42 +02:00
i915 drm/i915/gvt: fix cleanup sequence in intel_gvt_clean_device 2018-08-14 15:25:32 +08:00
imx drm/imx: imx-ldb: check if channel is enabled before printing warning 2018-07-16 16:56:34 +02:00
lib
mediatek drm-misc-next for 4.19: 2018-07-20 10:46:49 +10:00
meson drm/meson: Make DMT timings parameters and pixel clock generic 2018-07-16 11:14:59 +02:00
mga
mgag200 drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
msm drm/msm/disp/dpu: Mark a handful of functions as static 2018-07-30 08:50:12 -04:00
mxsfb
nouveau BackMerge v4.18-rc7 into drm-next 2018-07-30 10:39:22 +10:00
omapdrm drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
panel drm: drop _mode_ from update_edit_property() 2018-07-13 18:40:27 +02:00
pl111 drm/pl111: Use 64-bit arithmetic instead of 32-bit 2018-07-17 11:25:18 -07:00
qxl drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
r128
radeon drm-misc-next for 4.19: 2018-07-20 10:46:49 +10:00
rcar-du drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
rockchip drm/rockchip: Substitute is_yuv_support() with format->is_yuv 2018-07-18 16:59:27 +01:00
savage drm/savage: off by one in savage_bci_cmdbuf() 2018-07-04 14:27:01 +02:00
scheduler drm/scheduler: add NULL pointer check for run queue (v2) 2018-07-16 16:11:48 -05:00
selftests drm-misc-next for 4.19: 2018-06-22 12:58:08 +10:00
shmobile drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
sis
sti drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
stm drm/stm: Replace drm_dev_unref with drm_dev_put 2018-07-13 10:11:02 +02:00
sun4i BackMerge v4.18-rc7 into drm-next 2018-07-30 10:39:22 +10:00
tdfx
tegra BackMerge v4.18-rc7 into drm-next 2018-07-30 10:39:22 +10:00
tilcdc drm-misc-next for 4.19: 2018-07-20 10:46:49 +10:00
tinydrm drm/tinydrm: add backlight dependency for ili9341 2018-07-12 12:10:07 -05:00
ttm drm/ttm: Replace ttm_bo_unref() with ttm_bo_put() 2018-07-10 14:18:28 -05:00
tve200
udl Merge branch 'drm-udl-next' of git://people.freedesktop.org/~airlied/linux into drm-next 2018-07-31 08:24:33 +10:00
v3d Merge branch 'drm-next-4.19' of git://people.freedesktop.org/~agd5f/linux into drm-next 2018-07-20 14:54:31 +10:00
vc4 drm/vc4: Replace drm_dev_unref with drm_dev_put 2018-07-17 11:24:33 -07:00
vgem drm/vgem: off by one in vgem_gem_fault() 2018-07-03 15:06:15 +02:00
via treewide: Use array_size() in vzalloc() 2018-06-12 16:19:22 -07:00
virtio drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
vkms drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
vmwgfx drm-misc-next for 4.19: 2018-07-20 10:46:49 +10:00
xen drm-misc-next for 4.19: 2018-06-22 12:58:08 +10:00
zte drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
ati_pcigart.c
drm_agpsupport.c
drm_atomic_helper.c drm: drop _mode_ from remaining connector functions 2018-07-13 18:40:27 +02:00
drm_atomic.c drm/atomic: Avoid connector to writeback_connector casts 2018-07-07 07:51:19 +02:00
drm_auth.c
drm_blend.c
drm_bridge.c
drm_bufs.c
drm_cache.c
drm_client.c drm/client: Fix double free in error path 2018-07-13 12:07:46 +02:00
drm_color_mgmt.c
drm_connector.c drm/connector: Fix typo in drm_connector_list_iter_next() 2018-07-16 13:18:09 -04:00
drm_context.c
drm_crtc_helper_internal.h
drm_crtc_helper.c
drm_crtc_internal.h drm: drop _mode_ from remaining connector functions 2018-07-13 18:40:27 +02:00
drm_crtc.c drm: Skip __drm_mode_set_config_internal() on atomic drivers 2018-07-13 17:58:19 +03:00
drm_debugfs_crc.c drm/crc: Only report a single overflow when a CRC fd is opened 2018-07-06 14:57:03 +02:00
drm_debugfs.c drm: drop _mode_ from update_edit_property() 2018-07-13 18:40:27 +02:00
drm_dma.c
drm_dp_aux_dev.c
drm_dp_cec.c drm: add support for DisplayPort CEC-Tunneling-over-AUX 2018-07-13 17:58:19 +03:00
drm_dp_dual_mode_helper.c
drm_dp_helper.c drm/dp_helper: Add DP aux channel tracing 2018-07-16 11:47:53 -04:00
drm_dp_mst_topology.c drm: drop _mode_ from remaining connector functions 2018-07-13 18:40:27 +02:00
drm_drv.c drm/dp_helper: Add DP aux channel tracing 2018-07-16 11:47:53 -04:00
drm_dumb_buffers.c drm-misc-next for 4.19: 2018-06-28 13:29:07 +10:00
drm_edid_load.c
drm_edid.c drm-misc-next for 4.19: 2018-06-22 12:58:08 +10:00
drm_encoder_slave.c
drm_encoder.c
drm_fb_cma_helper.c drm/cma-helper: Remove drm_fb_cma_fbdev_init_with_funcs() 2018-07-10 14:54:50 +02:00
drm_fb_helper.c drm/fb-helper: Finish the generic fbdev emulation 2018-07-10 14:54:09 +02:00
drm_file.c drm: Begin an API for in-kernel clients 2018-07-10 14:51:37 +02:00
drm_flip_work.c
drm_fourcc.c drm/fourcc: Add is_yuv field to drm_format_info to denote if the format is yuv 2018-07-18 16:56:45 +01:00
drm_framebuffer.c drm: Add drm_plane_mask() 2018-07-02 18:45:55 +03:00
drm_gem_cma_helper.c
drm_gem_framebuffer_helper.c drm/gem-fb-helper: Always do implicit sync 2018-06-20 14:43:13 +02:00
drm_gem.c drm/i915: Prevent writing into a read-only object via a GGTT mmap 2018-07-13 16:14:04 +01:00
drm_global.c drm: add SPDX identifier and clarify license 2018-06-29 15:28:47 -05:00
drm_hashtab.c treewide: Use array_size() in vzalloc() 2018-06-12 16:19:22 -07:00
drm_info.c
drm_internal.h drm: provide management functions for drm_file 2018-06-25 16:17:03 +02:00
drm_ioc32.c
drm_ioctl.c drm: drop _mode_ from remaining connector functions 2018-07-13 18:40:27 +02:00
drm_irq.c
drm_kms_helper_common.c
drm_lease.c drm_mode_create_lease_ioctl(): fix open-coded filp_clone_open() 2018-07-10 23:29:03 -04:00
drm_legacy.h
drm_lock.c
drm_memory.c treewide: Use array_size() in vmalloc() 2018-06-12 16:19:22 -07:00
drm_mipi_dsi.c drm: Add support for pps and compression mode command packet 2018-07-25 07:51:05 -04:00
drm_mm.c drm/mm: Add a search-by-address variant to only inspect a single hole 2018-05-24 15:04:30 +01:00
drm_mode_config.c drm: writeback: Add client capability for exposing writeback connectors 2018-06-20 15:30:20 +01:00
drm_mode_object.c drm: drop _mode_ from remaining connector functions 2018-07-13 18:40:27 +02:00
drm_modes.c drm: drop _mode_ from remaining connector functions 2018-07-13 18:40:27 +02:00
drm_modeset_helper.c
drm_modeset_lock.c drm: Change deadlock-avoidance algorithm for the modeset locks. 2018-07-03 09:46:05 +02:00
drm_of.c drm/doc: Include drm_of.c helpers 2018-07-13 18:40:28 +02:00
drm_panel_orientation_quirks.c
drm_panel.c drm/panel: Let of_drm_find_panel() return -ENODEV when the panel is disabled 2018-07-10 17:59:05 +02:00
drm_pci.c drm: drop drm_pcie_get_speed_cap_mask and drm_pcie_get_max_link_width 2018-07-05 16:40:00 -05:00
drm_plane_helper.c drm: add missing ctx argument to plane transitional helpers 2018-07-03 09:30:19 +02:00
drm_plane.c drm: Introduce __setplane_atomic() 2018-07-13 17:58:19 +03:00
drm_prime.c dma-buf: remove kmap_atomic interface 2018-06-20 15:59:34 +02:00
drm_print.c drm: Add puts callback for the coredump printer 2018-07-30 08:49:41 -04:00
drm_probe_helper.c drm: drop _mode_ from remaining connector functions 2018-07-13 18:40:27 +02:00
drm_property.c drm: Use kvzalloc for allocating blob property memory 2018-07-02 11:05:21 -05:00
drm_rect.c
drm_scatter.c
drm_scdc_helper.c
drm_simple_kms_helper.c drm: drop _mode_ from drm_mode_connector_attach_encoder 2018-07-13 18:40:27 +02:00
drm_syncobj.c drm: Remove unecessary dma_fence_ops 2018-07-03 13:13:22 +02:00
drm_sysfs.c
drm_trace_points.c
drm_trace.h
drm_vblank.c
drm_vm.c gpu: drm: drm_vm: Adding new typedef vm_fault_t 2018-05-29 08:58:46 +02:00
drm_vma_manager.c drm: add SPDX idenitifier and clarify license 2018-06-29 15:28:47 -05:00
drm_writeback.c drm: writeback: Fix doc that says connector should be disconnected 2018-07-16 16:35:27 +01:00
Kconfig drm: add support for DisplayPort CEC-Tunneling-over-AUX 2018-07-13 17:58:19 +03:00
Makefile drm: add support for DisplayPort CEC-Tunneling-over-AUX 2018-07-13 17:58:19 +03:00