Created attachment 54798 [details] [review]
Patch for issue

Radeon driver with kms enabled may crash when the card does not have any power states registered. Card is onboard X1250. Patch is attached.

Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] RIP: 0010:[<ffffffffa00a5cf8>]  [<ffffffffa00a5cf8>] radeon_atombios_get_power_modes+0x298/0x310 [radeon]
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] RSP: 0018:ffff880137eedb78  EFLAGS: 00010283
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] RAX: 0000000000000000 RBX: ffff880138576000 RCX: fffffffffffffff0
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] RDX: ffff8801369f4c00 RSI: 0000000000000082 RDI: 0000000000000202
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] RBP: ffff880137eedba8 R08: 0000000000000000 R09: 0000000000000000
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] R13: 0000000001c20013 R14: 0000000000000000 R15: ffff880137118800
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] FS:  00007f617105e720(0000) GS:ffff88013fd00000(0000) knlGS:0000000000000000
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] CR2: 0000000000000020 CR3: 0000000137f56000 CR4: 00000000000006e0
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] Process modprobe (pid: 95, threadinfo ffff880137eec000, task ffff880137f3c500)
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] Stack:
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  ffff8801371189b0 0201adf838576000 ffff880137118c20 ffff880138576000
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  0000000000000002 0000000001c20013 ffff880137eedbc8 ffffffffa00f2335
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  ffff880138576000 0000000000000002 ffff880137eedbe8 ffffffffa00c14b5
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] Call Trace:
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffffa00f2335>] radeon_pm_init+0x115/0x2a0 [radeon]
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffffa00c14b5>] radeon_modeset_init+0x135/0x170 [radeon]
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffffa00a1ea0>] radeon_driver_load_kms+0x120/0x160 [radeon]
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffffa0028e10>] drm_get_pci_dev+0x190/0x2f0 [drm]
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffffa0105c7f>] radeon_pci_probe+0xae/0x42f [radeon]
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff812c205f>] local_pci_probe+0x5f/0xd0
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff812c32c8>] pci_device_probe+0x88/0xb0
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff8134152a>] ? driver_sysfs_add+0x7a/0xb0
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff81341658>] really_probe+0x68/0x190
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff813417c5>] driver_probe_device+0x45/0x70
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff8134188b>] __driver_attach+0x9b/0xa0
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff813417f0>] ? driver_probe_device+0x70/0x70
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff81340cf8>] bus_for_each_dev+0x68/0x90
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff813414ae>] driver_attach+0x1e/0x20
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff81340580>] bus_add_driver+0x1a0/0x260
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff81341f30>] driver_register+0x80/0x150
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff812c3575>] __pci_register_driver+0x55/0xd0
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff814d758b>] ? printk+0x68/0x6d
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffffa0029081>] drm_pci_init+0x111/0x120 [drm]
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffffa014d000>] ? 0xffffffffa014cfff
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffffa014d0e7>] radeon_init+0xe7/0x1000 [radeon]
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff810001d3>] do_one_initcall+0x43/0x180
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff8108c8ec>] sys_init_module+0xcc/0x220
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  [<ffffffff814e1d82>] system_call_fastpath+0x16/0x1b
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] Code: 00 44 89 a3 60 11 00 00 c7 83 68 11 00 00 00 00 00 00 48 89 c1 89 83 64 11 00 00 48 c1 e0 06 48 c1 e1 04 48 29 c8 48 8b 44 10 08 <0f> b7 40 20 66 89 83 80 11 00 00 48 83 c4 18 5b 41 5c 41 5d c9 
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] RIP  [<ffffffffa00a5cf8>] radeon_atombios_get_power_modes+0x298/0x310 [radeon]
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014]  RSP <ffff880137eedb78>
Dec 24 23:11:02 serveralex-mint kernel: [    1.137014] CR2: 0000000000000020
Dec 24 23:11:02 serveralex-mint kernel: [    1.143210] ---[ end trace c6e617fdb31200a0 ]---