linux-kernel - Re: i915 KMS framebuffer oops report

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Date:	Fri, 02 Jan 2009 16:34:54 -0800
From:	Eric Anholt <eric@...olt.net>
To:	Hubert Tonneau <hubert.tonneau@...lpliant.org>
Cc:	airlied@...il.com, linux-kernel@...r.kernel.org
Subject: Re: i915 KMS framebuffer oops report

On Tue, 2008-12-30 at 14:21 +0000, Hubert Tonneau wrote:
> I've tested the GIT tree submitted by Airlied for inclusion
> in 2.6.29, and just got an oops when trying to load i915
> with kernel mode setting:

Hmm, I've been poking at modesetting a bunch today while working on HDMI
support, and haven't managed to reproduce this.  Could you open a bug
with .config and dmesg?

> <6>Linux agpgart interface v0.103
> <6>agpgart-intel 0000:00:00.0: Intel 945GM Chipset
> <6>agpgart-intel 0000:00:00.0: detected 7932K stolen memory
> <6>agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xd0000000
> <6>[drm] Initialized drm 1.1.0 20060810
> <6>pci 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
> <7>pci 0000:00:02.0: setting latency timer to 64
> <1>BUG: unable to handle kernel NULL pointer dereference at 00000000
> <1>IP: [<00000000>] 0x0
> <4>*pde = 00000000 
> <0>Oops: 0000 [#1] SMP 
> <0>last sysfs file: 
> <4>Modules linked in: i915(+) cfbfillrect cfbimgblt cfbcopyarea i2c_algo_bit drm i2c_core intel_agp agpgart
> <4>
> <4>Pid: 1420, comm: insmod Not tainted (2.6.28 #1) Latitude D820                   
> <4>EIP: 0060:[<00000000>] EFLAGS: 00010246 CPU: 1
> <4>EIP is at 0x0
> <4>EAX: 00000000 EBX: c1fbc2a0 ECX: c2008500 EDX: c1fbc2a0
> <4>ESI: 00000000 EDI: f6f64148 EBP: 00000000 ESP: f648bca8
> <4> DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
> <0>Process insmod (pid: 1420, ti=f648a000 task=f6fcd8d0 task.ti=f648a000)
> <0>Stack:
> <4> c0152fe0 000000d0 00000000 00000000 00000000 00000000 f6f64148 c0153054
> <0> 00000000 00000000 00000000 00000000 00000020 f65853c0 c01530f0 00000000
> <0> f65853c0 f7e08bcc 00000000 f7cd3931 f6437f40 f6f64148 f6585440 f65853c0
> <0>Call Trace:
> <0> [<c0152fe0>] __read_cache_page+0x70/0xc0
> <0> [<c0153054>] read_cache_page_async+0x24/0xb0
> <0> [<c01530f0>] read_cache_page+0x10/0x50
> <0> [<f7e08bcc>] i915_gem_object_get_page_list+0x7c/0x100 [i915]
> <0> [<f7cd3931>] drm_mm_split_at_start+0x21/0x80 [drm]
> <0> [<f7e09437>] i915_gem_object_bind_to_gtt+0xd7/0x1f0 [i915]
> <0> [<f7e0a617>] i915_gem_object_pin+0x87/0xd0 [i915]
> <0> [<f7e0a9e2>] i915_gem_init_object+0x12/0x50 [i915]
> <0> [<f7ccc627>] drm_gem_object_alloc+0x87/0xb0 [drm]
> <0> [<f7e0aff1>] i915_gem_init_ringbuffer+0x71/0x340 [i915]
> <0> [<f7cd3887>] drm_mm_create_tail_node+0x27/0x80 [drm]
> <0> [<f7e03fc7>] i915_load_modeset_init+0x2e7/0x460 [i915]
> <0> [<f7e0434a>] i915_driver_load+0x1ba/0x2c0 [i915]
> <0> [<f7cd085e>] drm_get_dev+0x1ce/0x200 [drm]
> <0> [<c01ff5f0>] pci_get_dev_by_id+0x40/0x80
> <0> [<f7ccb17c>] drm_init+0x8c/0xf0 [drm]
> <0> [<f7c78000>] i915_init+0x0/0x6a [i915]
> <0> [<c0101113>] do_one_initcall+0x23/0x1d0
> <0> [<c01ee015>] idr_get_empty_slot+0xc5/0x150
> <0> [<c01b19d2>] sysfs_add_one+0x12/0x50
> <0> [<c01ee74f>] ida_get_new_above+0x3f/0x1b0
> <0> [<c01b1880>] sysfs_ilookup_test+0x0/0x10
> <0> [<c01b1880>] sysfs_ilookup_test+0x0/0x10
> <0> [<c0183de1>] ifind+0x31/0xa0
> <0> [<c01b1987>] __sysfs_add_one+0x47/0x80
> <0> [<c01b19d2>] sysfs_add_one+0x12/0x50
> <0> [<c01b18cf>] sysfs_addrm_start+0x3f/0xb0
> <0> [<c01b1b5e>] sysfs_addrm_finish+0xe/0xa0
> <0> [<c016a7bd>] __vunmap+0x4d/0xc0
> <0> [<c014a8c4>] load_module+0xa14/0xb70
> <0> [<c0152bb0>] filemap_fault+0x0/0x360
> <0> [<c013f277>] blocking_notifier_call_chain+0x17/0x20
> <0> [<c014ab06>] sys_init_module+0xe6/0x1a0
> <0> [<c010340a>] syscall_call+0x7/0xb
> <0>Code:  Bad EIP value.
> <0>EIP: [<00000000>] 0x0 SS:ESP 0068:f648bca8
> <4>---[ end trace 6e26e53289db93ad ]---
> 
> --
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-- 
Eric Anholt
eric@...olt.net                         eric.anholt@...el.com



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