Andi,
That's a bug that's been around for a while, and regardless of the
machine having no AGP, you still need agpgart for the 965 driver to
function as internally it's really an AGP device.
Alan.
On Sun, 2006-08-13 at 11:06 +0200, Andi Kleen wrote:
> Hello,
>
> After the recent announcements I tried the current DRM git tree on a
> Board with Intel 965 graphics. But this gives the appended oops
> when loading the i915 module.
>
> The crash is in this line in drm_lastclose(), presumably
> because the magic free list isn't initialized in this error path.
>
> list_for_each_entry_safe(pt, next, &dev->magicfree, head) {
>
>
> Of course the system doesn't have any AGP bridge since it is
> PCI-E only. agpgart was compiled in, but not active.
>
> The driver seems to have PCI IDs for my graphics device.
>
> -Andi
>
> [drm:drm_fill_in_dev] *ERROR* Cannot initialize the agpgart module.
> Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP:
> [<ffffffff88094bbc>] :drm:drm_lastclose+0xc9/0x332
> PGD 38381067 PUD 36ba7067 PMD 0
> Oops: 0000 [1] SMP
> CPU 0
> Modules linked in: i915 drm snd_pcm_oss snd_mixer_oss snd_seq snd_hda_intel
> snd_hda_codec snd_pcm snd_timer snd snd_page_alloc
> Pid: 3875, comm: insmod Not tainted 2.6.18-rc4 #11
> RIP: 0010:[<ffffffff88094bbc>] [<ffffffff88094bbc>]
> :drm:drm_lastclose+0xc9/0x332
> RSP: 0018:ffff8100378bdc28 EFLAGS: 00010297
> RAX: 0000000000000000 RBX: ffffffffffffffe8 RCX: 00000000c0000100
> RDX: ffff81003f4e5610 RSI: ffff8100378bc000 RDI: 0000000000000000
> RBP: ffff81003eb6e000 R08: ffff8100378bc000 R09: 0000000000000000
> R10: 0000000000000080 R11: 0000000100000000 R12: ffff81003f38b000
> R13: ffff81003eb6e028 R14: ffff81003f38b000 R15: 00000000ffffffea
> FS: 00002b14a8e926d0(0000) GS:ffffffff807fb000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> CR2: 0000000000000000 CR3: 0000000036bab000 CR4: 00000000000006e0
> Process insmod (pid: 3875, threadinfo ffff8100378bc000, task ffff81003f4db5d0)
> Stack: ffff81003eb6e000 ffff81003eb6e000 ffffffff880af900 ffff81003f38b000
> ffffffff880af638 ffffffff880979ff ffffffff880af638 ffffffff880af440
> 0000000000000296 ffffffff8022bc04 0000000000000000 0000000000000003
> Call Trace:
> [<ffffffff880979ff>] :drm:drm_get_dev+0x2c2/0x4d9
> [<ffffffff80347543>] pci_device_probe+0xdd/0x142
> [<ffffffff8039fd75>] driver_probe_device+0x52/0xa8
> [<ffffffff8039fea0>] __driver_attach+0x6b/0xa9
> [<ffffffff8039f2b6>] bus_for_each_dev+0x43/0x6e
> [<ffffffff8039f5f8>] bus_add_driver+0x73/0x10f
> [<ffffffff880afb00>] :i915:__this_module+0x0/0xffffffffffffcec7
> DWARF2 unwinder stuck at __this_module+0x0/0xffffffffffffcec7 [i915]
> Leftover inexact backtrace:
> [<ffffffff803470ca>] __pci_register_driver+0x57/0x7d
> [<ffffffff88094719>] :drm:drm_init+0xc5/0x141
> [<ffffffff8024b4f4>] sys_init_module+0x15ed/0x1727
> [<ffffffff80209612>] system_call+0x7e/0x83
>
>
> Code: 4c 8b 63 18 eb 3e 48 8b 53 18 48 8b 41 08 48 8d bd e8 00 00
> RIP [<ffffffff88094bbc>] :drm:drm_lastclose+0xc9/0x332
> RSP <ffff8100378bdc28>
> CR2: 0000000000000000
>
>
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