Problems with DRI on Acube Sam460 AMCC 460ex board

[Julian Margetson]

[   29.960572] Unable to handle kernel paging request for data at address 0x00000008
[   29.974350] Faulting instruction address: 0xc04a4f44
[   32.012918] Oops: Kernel access of bad area, sig: 11 [#1]
[   32.044900] PREEMPT Canyonlands
[   32.061504] Modules linked in: cfg80211 bnep rfcomm bluetooth
[   32.081023] CPU: 0 PID: 2087 Comm: Xorg Not tainted 4.0.0-rc2-Sam460ex #1
[   32.101802] task: ed6891a0 ti: ed606000 task.ti: ed606000
[   32.121175] NIP: c04a4f44 LR: c03e6a4c CTR: c03d7b6c
[   32.139995] REGS: ed607c50 TRAP: 0300   Not tainted  (4.0.0-rc2-Sam460ex)
[   32.160678] MSR: 00029000 <CE,EE,ME>  CR: 24004442  XER: 00000000
[   32.180922] DEAR: 00000008 ESR: 00000000
GPR00: c03e6a4c ed607d00 ed6891a0 eeac8000 00000000 0000000f ed607be8 00000000
GPR08: 0000f6a3 00000000 eeaae400 ed607cc0 24004422 b7ceeff8 b7d05c14 00000000
GPR16: 00000000 ffffffff 00000000 ed607e18 eeaae578 eebe2600 00000001 00004000
GPR24: 00004000 c075bd08 fffffff2 00000000 eeac8000 00000001 00000001 ee51a400
[   32.285496] NIP [c04a4f44] radeon_audio_enable+0x4/0x18
[   32.305509] LR [c03e6a4c] radeon_dvi_detect+0x388/0x3ac
[   32.325444] Call Trace:
[   32.342325] [ed607d00] [c03e6a4c] radeon_dvi_detect+0x388/0x3ac (unreliable)
[   32.364075] [ed607d30] [c0391cc4] drm_helper_probe_single_connector_modes_merge_bits+0xf4/0x434
[   32.387631] [ed607d70] [c03adecc] drm_mode_getconnector+0xe4/0x330
[   32.408687] [ed607e10] [c03a0bbc] drm_ioctl+0x348/0x464
[   32.428766] [ed607ed0] [c00d0aac] do_vfs_ioctl+0x52c/0x6e8
[   32.449123] [ed607f20] [c00d0ca8] SyS_ioctl+0x40/0x68
[   32.469149] [ed607f40] [c000ab04] ret_from_syscall+0x0/0x3c
[   32.489581] --- interrupt: c01 at 0x6fae92bc
[   32.489581]     LR = 0x6fae91e0
[   32.526311] Instruction dump:
[   32.543848] 8129012c 806a0018 2f890000 419e0018 81290004 2f890000 419e000c 7d2903a6
[   32.566711] 4e800420 38600000 4e800020 81231cd8 <81290008> 2f890000 4d9e0020 7d2903a6
[   32.741188] ---[ end trace c9d41ee106b06efa ]---
[   32.745808]

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