[Powerpc] Sam460ex Canyonlands issue -Kernel 4.4.6-rc1

[Julian Margetson]

Hi

Seeing the following when booting kernel 4.6-rc1 on Acube Sam460ex Canyonlands board.
This loops for a few times then the kernel boots.
No problem with the 4.6-rc1 with an A-eon Tabor Freescale e500v2 board.

Regards

Julian


  [    2.197839] ------------[ cut here ]------------
  [    2.197850] WARNING: CPU: 0 PID: 1 at drivers/gpu/drm/drm_irq.c:1368 drm_vblank_off+0x2c/0x1e0
  [    2.197853] Modules linked in:
  [    2.197859] CPU: 0 PID: 1 Comm: swapper Tainted: G        W       4.6.0-rc1-sam460ex-jm #23
  [    2.197863] task: ea850000 ti: ea846000 task.ti: ea846000
  [    2.197866] NIP: c03c057c LR: c03ec780 CTR: c03eec50
  [    2.197870] REGS: ea847860 TRAP: 0700   Tainted: G        W        (4.6.0-rc1-sam460ex-jm)
  [    2.197880] MSR: 00029000 <CE,EE,ME>  CR: 42ec8282  XER: 20000000
  [    2.197932]
  [    2.197932] GPR00: c03ec780 ea847910 ea850000 ea935000 00000003 000000ff eab704ec ea8be000
  [    2.197932] GPR08: 00000006 00000000 00000001 ea8479d0 22ec8282 00000000 ea935278 eeaaee00
  [    2.197932] GPR16: ea8bf000 c08aeaa4 eaad5800 eab48900 c0cf0000 ea935290 eaad5800 eab48900
  [    2.197932] GPR24: ea8bf000 c08a2c3c 00000000 c0bbc22a 00000000 ea935000 eab70000 eab2f18c
  [    2.197937] NIP [c03c057c] drm_vblank_off+0x2c/0x1e0
  [    2.197945] LR [c03ec780] atombios_crtc_dpms+0x90/0xf0
  [    2.197946] Call Trace:
  [    2.197956] [ea847910] [c08aeaa4] atombios_helper_funcs+0x0/0x218 (unreliable)
  [    2.197963] [ea847960] [c03ec780] atombios_crtc_dpms+0x90/0xf0
  [    2.197970] [ea847980] [c03eec74] atombios_crtc_disable+0x24/0x2a4
  [    2.197977] [ea8479d0] [c03abb8c] __drm_helper_disable_unused_functions+0x9c/0xd0
  [    2.197984] [ea8479f0] [c03ac954] drm_crtc_helper_set_config+0x680/0x934
  [    2.197993] [ea847a60] [c04062f4] radeon_crtc_set_config+0x30/0xb8
  [    2.197999] [ea847a70] [c03c8b28] drm_mode_set_config_internal+0x5c/0xe0
  [    2.198008] [ea847a90] [c03b7218] restore_fbdev_mode+0x20c/0x25c
  [    2.198016] [ea847ac0] [c03b8e24] drm_fb_helper_restore_fbdev_mode_unlocked+0x40/0x8c
  [    2.198024] [ea847ae0] [c03b8ebc] drm_fb_helper_set_par+0x4c/0x60
  [    2.198031] [ea847af0] [c036ba34] fbcon_init+0x318/0x410
  [    2.198039] [ea847b40] [c0395eb0] visual_init+0xc8/0x114
  [    2.198046] [ea847b60] [c0397628] do_bind_con_driver+0x1e0/0x2e0
  [    2.198053] [ea847bb0] [c0397aa8] do_take_over_console+0x1a0/0x1b0
  [    2.198059] [ea847be0] [c036bbac] do_fbcon_takeover+0x80/0xd8
  [    2.198068] [ea847bf0] [c003f474] notifier_call_chain+0x60/0x94
  [    2.198076] [ea847c10] [c003f758] __blocking_notifier_call_chain+0x50/0x68
  [    2.198085] [ea847c30] [c0372fb0] register_framebuffer+0x250/0x280
  [    2.198092] [ea847ca0] [c03b91f0] drm_fb_helper_initial_config+0x320/0x394
  [    2.198100] [ea847ce0] [c040e3d0] radeon_fbdev_init+0xdc/0x114
  [    2.198107] [ea847d00] [c04085fc] radeon_modeset_init+0x5a8/0x938
  [    2.198113] [ea847d60] [c03e5ebc] radeon_driver_load_kms+0xcc/0x134
  [    2.198120] [ea847d80] [c03c1a5c] drm_dev_register+0x84/0xc8
  [    2.198127] [ea847da0] [c03c3b54] drm_get_pci_dev+0xf4/0x18c
  [    2.198136] [ea847dc0] [c0357f44] pci_device_probe+0x78/0xcc
  [    2.198143] [ea847de0] [c04ce61c] driver_probe_device+0x124/0x264
  [    2.198149] [ea847e00] [c04ce7e4] __driver_attach+0x88/0xb0
  [    2.198159] [ea847e20] [c04ccbc4] bus_for_each_dev+0x90/0xa0
  [    2.198165] [ea847e50] [c04cdc64] bus_add_driver+0xe0/0x1f0
  [    2.198172] [ea847e70] [c04ceee0] driver_register+0xb4/0xf8
  [    2.198179] [ea847e90] [c00015f8] do_one_initcall+0x11c/0x1a0
  [    2.198187] [ea847f00] [c0c5fa9c] kernel_init_freeable+0x130/0x1cc
  [    2.198193] [ea847f30] [c0001bf4] kernel_init+0x14/0x108
  [    2.198201] [ea847f40] [c000b1d4] ret_from_kernel_thread+0x5c/0x64
  [    2.198204] --- interrupt: 0 at   (null)
  [    2.198204]     LR =   (null)
  [    2.198207] Instruction dump:
  [    2.198221] 4bfffdf0 9421ffb0 1d240084 7c0802a6 be61001c 90010054 83e3010c 7fff4a14
  [    2.198235] 81230160 7d492010 7d4a5110 394a0001 <0f0a0000> 7f844840 409c01a4 3ae3013c
  [    2.198237] ---[ end trace ee501c2ec7a725ac ]---

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