Chris Wilson 79a78dd626 drm/i915: Fail to load driver if KMS request without GEM ... The i915's implementation of KMS requires GEM in order to manage the memory and execution domains of the framebuffer and associated resources. By the point at which we detect broken a BIOS and need to disable GEM, we have already registered ourselves as a KMS driver with several subsystems. Rather than introducing a fragile unwind and attempt to continue with UMS, spit out an error and unload the driver. References: [Bug 15754] IP: [<ffffffffa0207589>] drm_mm_search_free+0x49/0x90 [drm] BUG: unable to handle kernel NULL pointer dereference at (null) https://bugzilla.kernel.org/show_bug.cgi?id=15754 [drm:i915_driver_load] *ERROR* Detected broken video BIOS with 262140/262144kB of video memory stolen. [drm:i915_driver_load] *ERROR* Disabling GEM. (try reducing stolen memory or updating the BIOS to fix). i915 0000:00:02.0: irq 30 for MSI/MSI-X [drm] set up 255M of stolen space BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffffa0207589>] drm_mm_search_free+0x49/0x90 [drm] PGD 69719067 PUD 69dda067 PMD 0 Oops: 0000 [#1] PREEMPT SMP last sysfs file: /sys/module/snd_seq_oss/initstate CPU 1 Pid: 867, comm: modprobe Not tainted 2.6.33-ARCH #1 G43Twins-FullHD/To Be Filled By O.E.M. RIP: 0010:[<ffffffffa0207589>] [<ffffffffa0207589>] drm_mm_search_free+0x49/0x90 [drm] RSP: 0018:ffff8800699f3af8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffffffffffff RCX: 0000000000000000 RDX: 0000000000001000 RSI: 0000000000001000 RDI: ffff8800693d0f78 RBP: ffff8800699f3b18 R08: 0000000000001000 R09: 0000000000000000 R10: 2222222222222222 R11: 0000000000000000 R12: ffff880068de70c0 R13: 0000000000001000 R14: 0000000000000000 R15: ffff8800689cb000 FS: 00007fa93f4e5700(0000) GS:ffff880001880000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000695a0000 CR4: 00000000000406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process modprobe (pid: 867, threadinfo ffff8800699f2000, task ffff8800694f4740) Stack: ffff880068de73c0 ffff880068de70c0 ffff8800689cb000 0000000000001000 <0> ffff8800699f3b68 ffffffffa0299f63 ffff8800693d0f78 0000120068de70c0 <0> ffff8800689cb000 ffff880068de73c0 ffff880068de70c0 ffff8800689cb000 Call Trace: [<ffffffffa0299f63>] i915_gem_object_bind_to_gtt+0x83/0x360 [i915] [<ffffffffa029a2e5>] i915_gem_object_pin+0xa5/0xb0 [i915] [<ffffffffa029a3c5>] i915_gem_init_ringbuffer+0xd5/0x510 [i915] [<ffffffffa028dbee>] i915_driver_load+0x4ce/0xd00 [i915] [<ffffffffa0205d37>] ? drm_sysfs_device_add+0x87/0xb0 [drm] [<ffffffffa0203363>] ? drm_get_minor+0x1d3/0x330 [drm] [<ffffffffa02037e6>] drm_get_dev+0x326/0x580 [drm] [<ffffffffa02bc0a5>] i915_pci_probe+0x10/0xd0 [i915] [<ffffffff811e98a2>] local_pci_probe+0x12/0x20 [<ffffffff811ea8e0>] pci_device_probe+0x80/0xb0 [<ffffffff8127b12a>] ? driver_sysfs_add+0x5a/0x90 [<ffffffff8127b273>] driver_probe_device+0x93/0x1a0 [<ffffffff8127b413>] __driver_attach+0x93/0xa0 [<ffffffff8127b380>] ? __driver_attach+0x0/0xa0 [<ffffffff8127a8f8>] bus_for_each_dev+0x68/0x90 [<ffffffff8127b0c9>] driver_attach+0x19/0x20 [<ffffffff8127a0ad>] bus_add_driver+0xcd/0x2d0 [<ffffffff8127b718>] driver_register+0x78/0x140 [<ffffffff811eab91>] __pci_register_driver+0x51/0xd0 [<ffffffffa02d6000>] ? i915_init+0x0/0x52 [i915] [<ffffffffa01fdc31>] drm_init+0x111/0x120 [drm] [<ffffffff810eb0cd>] ? register_shrinker+0x4d/0x60 [<ffffffffa02d6000>] ? i915_init+0x0/0x52 [i915] [<ffffffffa02d6050>] i915_init+0x50/0x52 [i915] [<ffffffff81002047>] do_one_initcall+0x37/0x1a0 [<ffffffff8108ed17>] sys_init_module+0xd7/0x250 [<ffffffff81009fc2>] system_call_fastpath+0x16/0x1b Code: eb 29 49 8b 41 28 31 d2 49 f7 f5 85 d2 74 39 44 89 c0 29 d0 48 89 c2 48 01 f2 49 39 d2 73 29 0f 1f 00 49 89 da 4c 89 d3 4d 89 d9 <4d> 8b 19 49 39 f9 41 0f 18 0b 74 2b 4d 8b 51 30 4d 89 cc 49 39 RIP [<ffffffffa0207589>] drm_mm_search_free+0x49/0x90 [drm] RSP <ffff8800699f3af8> CR2: 0000000000000000 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Eric Anholt <eric@anholt.net>		2010-05-26 12:36:00 -07:00
..
drm	drm/i915: Fail to load driver if KMS request without GEM	2010-05-26 12:36:00 -07:00
vga	Merge remote branch 'anholt/drm-intel-next' into drm-next	2010-05-19 09:35:51 +10:00
Makefile	PCI/GPU: implement VGA arbitration on Linux	2009-09-09 13:29:36 -07:00