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 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev