[Bug 101881] [regression] 32bit steam games segfault when launched with DRI_PRIME=1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101881

--- Comment #12 from Mike Lothian <mike at fireburn.co.uk> ---
Hmm and I'm now seeing this in my dmesg when trying to launch Borderlands 2

[26293.375658] si_shader:1[28310]: segfault at 5 ip 00000000f2964d87 sp
00000000f0cc3700 error 4 in libLLVMInstCombine.so.6.0.0svn[f28a2000+f5000]
[26299.533379] ------------[ cut here ]------------
[26299.533394] WARNING: CPU: 6 PID: 24348 at dm_suspend+0x49/0x50
[26299.533397] Modules linked in:
[26299.533404] CPU: 6 PID: 24348 Comm: kworker/6:0 Tainted: G        W      
4.13.0-rc2-dc+ #1
[26299.533407] Hardware name: Alienware Alienware 15 R2/0H6J09, BIOS 1.3.10
12/12/2016
[26299.533413] Workqueue: pm pm_runtime_work
[26299.533417] task: ffff88086fb08000 task.stack: ffffc9000b174000
[26299.533423] RIP: 0010:dm_suspend+0x49/0x50
[26299.533426] RSP: 0018:ffffc9000b177cb0 EFLAGS: 00010282
[26299.533429] RAX: 0000000000000000 RBX: ffff88089cad0000 RCX:
0000000000000000
[26299.533432] RDX: 0000000000000001 RSI: 0000000000000246 RDI:
ffff88089cad9168
[26299.533435] RBP: 0000000000000003 R08: 000000000001d8e0 R09:
ffffea0016638000
[26299.533437] R10: 0000000000000000 R11: 0000000000000000 R12:
ffff88089cad0000
[26299.533439] R13: ffffffff8200b700 R14: 0000000000000000 R15:
ffff88089c91ab30
[26299.533443] FS:  0000000000000000(0000) GS:ffff8808c1d80000(0000)
knlGS:0000000000000000
[26299.533446] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[26299.533449] CR2: 00007f2d92d83000 CR3: 000000000220a000 CR4:
00000000001406e0
[26299.533451] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[26299.533454] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[26299.533456] Call Trace:
[26299.533463]  ? amdgpu_suspend+0x5a/0x140
[26299.533467]  ? amdgpu_device_suspend+0x1eb/0x3a0
[26299.533472]  ? enqueue_hrtimer+0x32/0x80
[26299.533478]  ? vga_switcheroo_runtime_resume+0x50/0x50
[26299.533484]  ? amdgpu_pmops_runtime_suspend+0x4d/0xc0
[26299.533490]  ? pci_pm_runtime_suspend+0x57/0x130
[26299.533496]  ? vga_switcheroo_runtime_resume+0x50/0x50
[26299.533502]  ? vga_switcheroo_runtime_suspend+0x19/0x90
[26299.533506]  ? __rpm_callback+0xb5/0x1e0
[26299.533511]  ? vga_switcheroo_runtime_resume+0x50/0x50
[26299.533515]  ? rpm_callback+0x1a/0x70
[26299.533521]  ? vga_switcheroo_runtime_resume+0x50/0x50
[26299.533524]  ? rpm_suspend+0x117/0x5f0
[26299.533529]  ? pm_runtime_work+0x58/0x80
[26299.533534]  ? process_one_work+0x1d5/0x3d0
[26299.533539]  ? worker_thread+0x42/0x3c0
[26299.533544]  ? cancel_delayed_work_sync+0x10/0x10
[26299.533548]  ? kthread+0x113/0x130
[26299.533551]  ? kthread_create_on_node+0x40/0x40
[26299.533557]  ? do_group_exit+0x35/0xa0
[26299.533563]  ? ret_from_fork+0x22/0x30
[26299.533565] Code: 91 00 00 00 75 25 48 8b 7b 08 e8 33 47 f1 ff 48 8b bb 78
7a 00 00 48 89 83 e0 91 00 00 be 08 00 00 00 e8 6b 74 04 00 31 c0 5b c3 <0f> ff
eb d7 0f 1f 00 41 56 41 55 31 f6 41 54 55 53 48 8b 6f 08 
[26299.533618] ---[ end trace bb8c8d1a48bb06ff ]---

I'll try and figure out if that's LLVM or amd-staging-drm-next

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