Re: [PATCH v14 0/3] Move backlight helper functions from tinydrm-helpers to linux/backlight

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Den 21.10.2017 13.55, skrev Meghana Madhyastha:
Changes in v14:
- s/backlight_get/of_find_backlight/ in patch 2/3
- Change commit message in patch 3/3 from requiring to acquiring

Meghana Madhyastha (3):
   drm/tinydrm: Move helper functions from tinydrm-helpers to backlight.h
   drm/tinydrm: Move tinydrm_of_find_backlight to backlight.c
   drm/tinydrm: Add devres versions of of_find_backlight

I tried the patchset and this is what I got:

[    8.057792] Unable to handle kernel paging request at virtual address fffffe6b
[    8.069118] pgd = 93817cf7
[    8.075704] [fffffe6b] *pgd=1bfd7861, *pte=00000000, *ppte=00000000
[    8.086047] Internal error: Oops: 37 [#1] ARM
[    8.094285] Modules linked in: mi0283qt(+) mipi_dbi tinydrm backlight bcm2835_rng rng_core [    8.110535] CPU: 0 PID: 121 Comm: systemd-udevd Not tainted 4.15.0-rc2+ #2
[    8.121531] Hardware name: BCM2835
[    8.128964] task: 85dc6e21 task.stack: 4d8f2d19
[    8.137482] PC is at kobject_put+0x18/0x1dc
[    8.145556] LR is at put_device+0x24/0x28
[    8.153312] pc : [<c076a1b4>]    lr : [<c048edb8>] psr: a0000013
[    8.163321] sp : d6d33c18  ip : d6d33c40  fp : d6d33c3c
[    8.172238] r10: c0496d38  r9 : 00000000  r8 : d6e46680
[    8.181108] r7 : 00000004  r6 : d766bc00  r5 : d6d33c70  r4 : fffffe4b
[    8.191237] r3 : bf0113b8  r2 : d766bd2c  r1 : d6e46710  r0 : fffffe4b
[    8.201248] Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM Segment none
[    8.211869] Control: 00c5387d  Table: 16d20008  DAC: 00000051
[    8.221141] Process systemd-udevd (pid: 121, stack limit = 0xa0ab0c84)
[    8.231264] Stack: (0xd6d33c18 to 0xd6d34000)
[    8.239228] 3c00:                                                       bf011858 c049728c [    8.254539] 3c20: d7737010 d6e46700 d6d33c70 d766bc00 d6d33c4c d6d33c40 c048edb8 c076a1a8 [    8.270045] 3c40: d6d33c5c d6d33c50 bf0113dc c048eda0 d6d33c6c d6d33c60 c0496fc4 bf0113c4 [    8.285883] 3c60: d6d33ca4 d6d33c70 c04979f0 c0496fb4 d7737000 d6e46700 d6d33c9c d766bc00 [    8.301819] 3c80: 00000000 bf030100 c0d369dc c0d369e0 0000000e fffffdfb d6d33cb4 d6d33ca8 [    8.317917] 3ca0: c0497ad0 c0497858 d6d33cec d6d33cb8 c0493efc c0497a94 c057e738 c057d26c [    8.334043] 3cc0: d6d33cec d766bc00 d766bc34 bf030100 c0c4a5d8 00000001 d6e46464 00000028 [    8.350344] 3ce0: d6d33d0c d6d33cf0 c049414c c0493c4c 00000001 00000000 bf030100 c04940b0 [    8.367036] 3d00: d6d33d34 d6d33d10 c0492018 c04940bc d754f28c d76afbb0 d6dca534 bf030100 [    8.383997] 3d20: 00000000 d6dca500 d6d33d44 d6d33d38 c0493750 c0491fa8 d6d33d6c d6d33d48 [    8.401301] 3d40: c0493124 c0493734 bf02f4d6 d6d33d58 bf030100 bf033000 c0c04048 00000000 [    8.418938] 3d60: d6d33d84 d6d33d70 c0494954 c0493048 bf030140 bf033000 d6d33d94 d6d33d88 [    8.436692] 3d80: c04c8794 c04948b4 d6d33da4 d6d33d98 bf033020 c04c8748 d6d33e1c d6d33da8 [    8.454638] 3da0: c0101a30 bf03300c d6d33dcc d6d33db8 c01013f4 c03f7c64 c0221690 60000013 [    8.472918] 3dc0: d6d33e44 d6d33dd0 c010d04c c01013e0 d7401e40 014000c0 0000000c c0221770 [    8.491185] 3de0: d6d33e1c d6d33df0 c0221770 c021e29c 00000001 fc36740d bf030140 00000001 [    8.509455] 3e00: d6e46500 d6e46440 00000001 d6e46464 d6d33e44 d6d33e20 c0178628 c0101978 [    8.527727] 3e20: bf030140 d6e46440 d6d33e44 d6d33f40 00000001 bf030140 d6d33f1c d6d33e48 [    8.546000] 3e40: c0177810 c01785c8 bf03014c 00007fff bf030140 c0174ae8 d6d33f38 d6d33eb8 [    8.564264] 3e60: d6d33e9c b6d4f004 dcb059a4 c0c1619c bf030324 d6e46448 bf030188 dcad6000 [    8.582529] 3e80: 00000000 d6ca3e40 00000000 00000000 00000000 00000000 00000000 00000000 [    8.600797] 3ea0: 00000000 00000000 00000000 00000000 6e72656b 00006c65 00000000 00000000 [    8.619065] 3ec0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [    8.637319] 3ee0: 00000000 00000000 00000000 fc36740d 7fffffff 00000000 b6d4f004 0000000d [    8.655582] 3f00: 0000017b c0108044 d6d32000 00000000 d6d33fa4 d6d33f20 c0177f94 c0175d00 [    8.673835] 3f20: 7fffffff 00000000 00000003 00000000 00000000 dcad6000 0002f9f4 00000000 [    8.692093] 3f40: dcad6b80 dcad6000 0002f9f4 dcb05274 dcaf9e6a dcafa860 00003000 00003240 [    8.710350] 3f60: 00000000 00000000 00000000 00001e34 0000002e 0000002f 00000019 00000000 [    8.728612] 3f80: 00000013 00000000 00000000 1ef80900 00000000 00000000 00000000 d6d33fa8 [    8.746870] 3fa0: c0107e60 c0177f04 1ef80900 00000000 0000000d b6d4f004 00000000 b6d4f928 [    8.765132] 3fc0: 1ef80900 00000000 00000000 0000017b b6d4f004 00020000 00af6e18 00000000 [    8.783394] 3fe0: bec95200 bec951f0 b6d4709c b6ea3c40 60000010 0000000d 00000000 00000000 [    8.801685] [<c076a1b4>] (kobject_put) from [<c048edb8>] (put_device+0x24/0x28) [    8.814234] [<c048edb8>] (put_device) from [<bf0113dc>] (devm_backlight_put+0x24/0x28 [backlight]) [    8.833323] [<bf0113dc>] (devm_backlight_put [backlight]) from [<c0496fc4>] (devm_action_release+0x1c/0x20) [    8.853182] [<c0496fc4>] (devm_action_release) from [<c04979f0>] (release_nodes+0x1a4/0x1cc) [    8.871702] [<c04979f0>] (release_nodes) from [<c0497ad0>] (devres_release_all+0x48/0x54) [    8.889956] [<c0497ad0>] (devres_release_all) from [<c0493efc>] (driver_probe_device+0x2bc/0x470) [    8.908937] [<c0493efc>] (driver_probe_device) from [<c049414c>] (__driver_attach+0x9c/0x100) [    8.927557] [<c049414c>] (__driver_attach) from [<c0492018>] (bus_for_each_dev+0x7c/0xa0) [    8.945822] [<c0492018>] (bus_for_each_dev) from [<c0493750>] (driver_attach+0x28/0x30) [    8.963916] [<c0493750>] (driver_attach) from [<c0493124>] (bus_add_driver+0xe8/0x240) [    8.981929] [<c0493124>] (bus_add_driver) from [<c0494954>] (driver_register+0xac/0xf0) [    9.000048] [<c0494954>] (driver_register) from [<c04c8794>] (__spi_register_driver+0x58/0x6c) [    9.018823] [<c04c8794>] (__spi_register_driver) from [<bf033020>] (mi0283qt_spi_driver_init+0x20/0x1000 [mi0283qt]) [    9.039575] [<bf033020>] (mi0283qt_spi_driver_init [mi0283qt]) from [<c0101a30>] (do_one_initcall+0xc4/0x184) [    9.059727] [<c0101a30>] (do_one_initcall) from [<c0178628>] (do_init_module+0x6c/0x1fc) [    9.078036] [<c0178628>] (do_init_module) from [<c0177810>] (load_module+0x1b1c/0x2090) [    9.096248] [<c0177810>] (load_module) from [<c0177f94>] (SyS_finit_module+0x9c/0xcc) [    9.114284] [<c0177f94>] (SyS_finit_module) from [<c0107e60>] (ret_fast_syscall+0x0/0x54)
[    9.132673] Code: e24cb004 e24dd00c e2504000 0a00005e (e5d43020)
[    9.144181] ---[ end trace 149c05934b6a6dcc ]---

Noralf.

  drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c | 95 --------------------------
  drivers/gpu/drm/tinydrm/mi0283qt.c             |  3 +-
  drivers/gpu/drm/tinydrm/mipi-dbi.c             |  5 +-
  drivers/video/backlight/backlight.c            | 68 ++++++++++++++++++
  include/drm/tinydrm/tinydrm-helpers.h          |  4 --
  include/linux/backlight.h                      | 56 +++++++++++++++
  6 files changed, 129 insertions(+), 102 deletions(-)


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