From: Michael Ellerman <mpe@ellerman•id.au>
To: Julian Margetson <runaway@candw•ms>
Cc: linuxppc-dev@lists•ozlabs.org
Subject: Re: Problems with Kernels 3.17-rc1 and onwards on Acube Sam460 AMCC 460ex board
Date: Thu, 05 Mar 2015 10:52:34 +1100 [thread overview]
Message-ID: <1425513154.32154.12.camel@ellerman.id.au> (raw)
In-Reply-To: <54F6F081.9060007@candw.ms>
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
next prev parent reply other threads:[~2015-03-04 23:52 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-15 12:16 Problems with Kernels 3.17-rc1 and onwards on Acube Sam460 AMCC 460ex board Julian Margetson
2015-02-16 0:18 ` Michael Ellerman
2015-02-18 19:45 ` Julian Margetson
2015-02-19 0:13 ` Michael Ellerman
2015-02-19 1:36 ` Julian Margetson
2015-02-19 2:56 ` Michael Ellerman
2015-02-19 3:25 ` Julian Margetson
2015-02-20 19:25 ` Julian Margetson
2015-02-24 0:32 ` Michael Ellerman
2015-02-24 2:22 ` Julian Margetson
2015-02-24 11:08 ` Julian Margetson
2015-02-24 19:14 ` Gerhard Pircher
2015-02-24 20:26 ` Julian Margetson
2015-02-25 13:26 ` Julian Margetson
2015-02-25 13:32 ` Julian Margetson
2015-03-04 11:46 ` Julian Margetson
2015-03-04 23:52 ` Michael Ellerman [this message]
2015-03-05 11:15 ` Julian Margetson
2015-03-07 16:10 ` Julian Margetson
2015-03-10 0:30 ` Michael Ellerman
2015-03-10 0:53 ` Julian Margetson
[not found] ` <45dfe4c8990.73f22654@smtp.gmail.com>
2015-02-24 19:05 ` Julian Margetson
2015-02-19 15:57 ` Julian Margetson
[not found] ` <54EB253F.9020704@candw.ms>
2015-02-23 15:07 ` Problems with DRI " Julian Margetson
2016-02-02 13:54 ` commit 9178ba294b6839eeff1a91bed95515d783f3ee6c Julian Margetson
2016-08-05 11:26 ` Problems with Kernels 3.17-rc1 and onwards on Acube Sam460 AMCC 460ex board Julian Margetson
2015-02-19 2:20 ` Julian Margetson
2015-02-18 20:13 ` Julian Margetson
2015-04-27 10:59 ` Kernel 4.1-rc1 build fails on Sam460ex amcc 460ex powerpc Canyonlands Julian Margetson
2015-04-28 1:12 ` Michael Ellerman
2015-04-28 3:49 ` Tejun Heo
2015-05-04 17:18 ` Andy Shevchenko
2015-05-04 18:13 ` Tejun Heo
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