On 3/4/2015 7:52 PM, Michael Ellerman wrote:
On Wed, 2015-03-04 at 07:46 -0400, Julian Margetson wrote:
Still stuck.
Problem still exist with 4.0.0-rc2 and I cant finish the bisect.
Triggered when using HDMI. No problem when using DVI.
[ 33.535692] Unable to handle kernel paging request for data at address
0x00000008
[ 33.566786] Faulting instruction address: 0xc049db84
[ 33.574188] Vector: 300 (Data Access) at [eeb13c20]
[ 33.579086] pc: c049db84: radeon_audio_enable+0x4/0x18
[ 33.584630] lr: c049e2f4: radeon_audio_detect+0x288/0x290
[ 33.590429] sp: eeb13cd0
[ 33.593310] msr: 29000
[ 33.595931] dar: 8
[ 33.598207] dsisr: 0
[ 33.600480] current = 0xeea93ac0
[ 33.603885] pid = 2311, comm = Xorg
[ 33.607922] enter ? for help
[ 33.610806] [link register ] c049e2f4 radeon_audio_detect+0x288/0x290
[ 33.617469] [eeb13cd0] c049e254 radeon_audio_detect+0x1e8/0x290 (unreliable)
[ 33.624571] [eeb13d00] c03dfe7c radeon_dvi_detect+0x388/0x3ac
[ 33.630369] [eeb13d30] c038b9d4
drm_helper_probe_single_connector_modes_merge_bits+0xf4/0x434
[ 33.638954] [eeb13d70] c03a7670 drm_mode_getconnector+0xf4/0x334
[ 33.645022] [eeb13e10] c039a8c0 drm_ioctl+0x348/0x464
[ 33.650135] [eeb13ed0] c00d0ca0 do_vfs_ioctl+0x52c/0x6e8
[ 33.655507] [eeb13f20] c00d0e9c SyS_ioctl+0x40/0x68
[ 33.660438] [eeb13f40] c000ab04 ret_from_syscall+0x0/0x3c
[ 33.665896] --- Exception: c01 (System Call) at 6fb1b8dc
[ 33.671253] SP (bfa56d20) is in userspace
[ 33.675263] mon> <no input ...>
This just looks like a missing NULL check in the radeon code. Probably here:
void radeon_audio_detect(struct drm_connector *connector,
enum drm_connector_status status)
{
struct radeon_device *rdev;
struct radeon_encoder *radeon_encoder;
struct radeon_encoder_atom_dig *dig;
if (!connector || !connector->encoder)
return;
rdev = connector->encoder->dev->dev_private;
^
So you could try adding "!connector->encoder->dev" to the if there.
cheers
Thanks.
Results in the following .
[ 3.179934] [drm] Radeon Display Connectors
[ 3.184711] [drm] Connector 0:
[ 3.187827] [drm] DP-1
[ 3.190443] [drm] HPD1
[ 3.193018] [drm] DDC: 0x6470 0x6470 0x6474 0x6474 0x6478 0x6478
0x647c 0x6 47c
[ 3.200502] [drm] Encoders:
[ 3.203510] [drm] DFP1: INTERNAL_UNIPHY2
[ 3.207823] [drm] Connector 1:
[ 3.210923] [drm] HDMI-A-1
[ 3.213831] [drm] HPD5
[ 3.216381] [drm] DDC: 0x6480 0x6480 0x6484 0x6484 0x6488 0x6488
0x648c 0x6 48c
[ 3.223809] [drm] Encoders:
[ 3.226795] [drm] DFP2: INTERNAL_UNIPHY2
[ 3.231083] [drm] Connector 2:
[ 3.234155] [drm] DVI-I-1
[ 3.236968] [drm] HPD4
[ 3.239523] [drm] DDC: 0x6450 0x6450 0x6454 0x6454 0x6458 0x6458
0x645c 0x6 45c
[ 3.246942] [drm] Encoders:
[ 3.249929] [drm] DFP3: INTERNAL_UNIPHY
[ 3.254130] [drm] CRT1: INTERNAL_KLDSCP_DAC1
[ 3.262872] Unable to handle kernel paging request for data at
address 0x00000000
[ 3.270407] Faulting instruction address: 0xc04a4280
[ 3.275394] Vector: 300 (Data Access) at [ea847b20]
[ 3.280286] pc: c04a4280: radeon_audio_detect+0x1c/0x290
[ 3.286016] lr: c03e6170: radeon_dp_detect+0x218/0x224
[ 3.291563] sp: ea847bd0
[ 3.294453] msr: 29000
[ 3.297084] dar: 0
[ 3.299366] dsisr: 0
[ 3.301649] current = 0xea850000
[ 3.305062] pid = 1, comm = swapper
[ 3.309101] enter ? for help
[ 3.311994] [ea847c00] c03e6170 radeon_dp_detect+0x218/0x224
[ 3.317709] [ea847c20] c039160c
drm_helper_probe_single_connector_modes_merge _bits+0xf4/0x434
[ 3.326303] [ea847c60] c0398d68
drm_fb_helper_probe_connector_modes+0x5c/0x70
[ 3.333499] [ea847c80] c039ad40 drm_fb_helper_initial_config+0x38/0x380
[ 3.340174] [ea847cc0] c03f1848 radeon_fbdev_init+0xc8/0xfc
[ 3.345808] [ea847ce0] c03eb1cc radeon_modeset_init+0x77c/0x94c
[ 3.351781] [ea847d40] c03c72fc radeon_driver_load_kms+0xcc/0x134
[ 3.357935] [ea847d60] c03a3cfc drm_dev_register+0x9c/0x120
[ 3.363569] [ea847d80] c03a6538 drm_get_pci_dev+0xf4/0x190
[ 3.369116] [ea847da0] c033d194 pci_device_probe+0x68/0xb4
[ 3.374680] [ea847dc0] c04b8a4c driver_probe_device+0xd4/0x1f4
[ 3.380583] [ea847df0] c04b8c48 __driver_attach+0x78/0xa0
[ 3.386034] [ea847e10] c04b6fd8 bus_for_each_dev+0x8c/0x9c
[ 3.391572] [ea847e40] c04b81a8 bus_add_driver+0xf8/0x1d4
[ 3.397024] [ea847e60] c04b90fc driver_register+0xb4/0xf8
[ 3.402475] [ea847e80] c00016f0 do_one_initcall+0x114/0x19c
[ 3.408109] [ea847ef0] c0992a8c kernel_init_freeable+0x124/0x1c0
[ 3.414176] [ea847f30] c0001cc0 kernel_init+0x14/0xf4
[ 3.419280] [ea847f40] c000ac5c ret_from_kernel_thread+0x5c/0x64
[ 3.425347] mon> <no input ...>
[ 5.428725] Oops: Kernel access of bad area, sig: 11 [#1]
[ 5.434140] PREEMPT Canyonlands
[ 5.437301] Modules linked in:
[ 5.440378] CPU: 0 PID: 1 Comm: swapper Not tainted 4.0.0-rc2-Sam460ex #1
[ 5.447182] task: ea850000 ti: ea846000 task.ti: ea846000
[ 5.452597] NIP: c04a4280 LR: c03e6170 CTR: c03e44c0
[ 5.457571] REGS: ea847b20 TRAP: 0300 Not tainted (4.0.0-rc2-Sam460ex)
[ 5.464374] MSR: 00029000 <CE,EE,ME> CR: 82000028 XER: 00000000
[ 5.470582] DEAR: 00000000 ESR: 00000000
GPR00: c03e6170 ea847bd0 ea850000 eeb6e400 00000002 00000000 ea847a48
00000000
GPR08: 00000000 ffffffff 00000000 ea847c00 22000022 00000000 c0910000
c091798f
GPR16: c09179a5 c09179bb c09179d1 c09179e7 c09179fc c0910000 00000001
00004000
GPR24: 00004000 c0759c14 c0b40000 eeac8000 eeb671a0 eeb66400 00000000
eeb6e400
[ 5.503365] NIP [c04a4280] radeon_audio_detect+0x1c/0x290
[ 5.508780] LR [c03e6170] radeon_dp_detect+0x218/0x224
[ 5.513931] Call Trace:
[ 5.516391] [ea847bd0] [eeb6e40c] 0xeeb6e40c (unreliable)
[ 5.521835] [ea847c00] [c03e6170] radeon_dp_detect+0x218/0x224
[ 5.527696] [ea847c20] [c039160c]
drm_helper_probe_single_connector_modes_mer ge_bits+0xf4/0x434
[ 5.536429] [ea847c60] [c0398d68]
drm_fb_helper_probe_connector_modes+0x5c/0x 70
[ 5.543772] [ea847c80] [c039ad40] drm_fb_helper_initial_config+0x38/0x380
[ 5.550587] [ea847cc0] [c03f1848] radeon_fbdev_init+0xc8/0xfc
[ 5.556358] [ea847ce0] [c03eb1cc] radeon_modeset_init+0x77c/0x94c
[ 5.562477] [ea847d40] [c03c72fc] radeon_driver_load_kms+0xcc/0x134
[ 5.568771] [ea847d60] [c03a3cfc] drm_dev_register+0x9c/0x120
[ 5.574544] [ea847d80] [c03a6538] drm_get_pci_dev+0xf4/0x190
[ 5.580231] [ea847da0] [c033d194] pci_device_probe+0x68/0xb4
[ 5.585916] [ea847dc0] [c04b8a4c] driver_probe_device+0xd4/0x1f4
[ 5.591948] [ea847df0] [c04b8c48] __driver_attach+0x78/0xa0
[ 5.597547] [ea847e10] [c04b6fd8] bus_for_each_dev+0x8c/0x9c
[ 5.603233] [ea847e40] [c04b81a8] bus_add_driver+0xf8/0x1d4
[ 5.608831] [ea847e60] [c04b90fc] driver_register+0xb4/0xf8
[ 5.614430] [ea847e80] [c00016f0] do_one_initcall+0x114/0x19c
[ 5.620204] [ea847ef0] [c0992a8c] kernel_init_freeable+0x124/0x1c0
[ 5.626408] [ea847f30] [c0001cc0] kernel_init+0x14/0xf4
[ 5.631661] [ea847f40] [c000ac5c] ret_from_kernel_thread+0x5c/0x64
[ 5.637864] Instruction dump:
[ 5.640851] 80890010 38210020 4bfffb20 39610020 4bb6ced0 9421ffd0
7c0802a6 bf 810020
[ 5.648732] 7c7f1b79 90010034 41820274 83df020c <813e0000> 2f890000
419e0264 2b840001
[ 5.656812] ---[ end trace bdaa0514de2b69bd ]---
[ 5.661441]
[ 6.663014] Kernel panic - not syncing: Attempted to kill init!
exitcode=0x00 00000b
[ 6.663014]
[ 6.672182] Rebooting in 180 seconds..
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