On Wed, Sep 23, 2015 at 04:44:50PM +0200, Daniel Vetter wrote:
> sorry I sprinkled the locking stuff in the wrong places. Still confused
> why the resume side doesn't blow up anywhere
But it does:
[ 69.394204] BUG: unable to handle kernel NULL pointer dereference at 0000000000000034
[ 69.402080] IP: [<ffffffff81321296>] pci_restore_msi_state+0x196/0x240
[ 69.408624] PGD 4162b8067 PUD 416581067 PMD 0
[ 69.413122] Oops: 0000 [#1] PREEMPT SMP
[ 69.417101] Modules linked in: tun sha256_ssse3 sha256_generic drbg binfmt_misc ipv6 vfat fat fuse dm_crypt dm_mod kv
m_amd kvm crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd amd64_edac_mod edac_mce_amd fa
m15h_power k10temp amdkfd amd_iommu_v2 radeon acpi_cpufreq
[ 69.443647] CPU: 4 PID: 814 Comm: kworker/u16:5 Not tainted 4.3.0-rc2+ #3
[ 69.450430] Hardware name: To be filled by O.E.M. To be filled by O.E.M./M5A97 EVO R2.0, BIOS 1503 01/16/2013
[ 69.460336] Workqueue: events_unbound async_run_entry_fn
[ 69.465667] task: ffff88042a255f00 ti: ffff880428a68000 task.ti: ffff880428a68000
[ 69.473145] RIP: 0010:[<ffffffff81321296>] [<ffffffff81321296>] pci_restore_msi_state+0x196/0x240
[ 69.482131] RSP: 0018:ffff880428a6bc28 EFLAGS: 00010286
[ 69.487436] RAX: 0000000000000000 RBX: ffff88042a308000 RCX: 0000000000000000
[ 69.494568] RDX: 0000000000000001 RSI: ffffffff81304448 RDI: ffffffff816c7a1b
[ 69.501700] RBP: ffff880428a6bc40 R08: 0000000000000001 R09: 0000000000522000
[ 69.508833] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[ 69.515965] R13: ffff88042a3087b0 R14: ffff88042a308010 R15: ffff88042a308038
[ 69.523097] FS: 00007fc91328a700(0000) GS:ffff88042ce00000(0000) knlGS:0000000000000000
[ 69.531185] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 69.536931] CR2: 0000000000000034 CR3: 00000004164c7000 CR4: 00000000000406e0
[ 69.544061] Stack:
[ 69.546073] 0080002c2a3087b0 0000000000000000 ffff88042a308000 ffff880428a6bc78
[ 69.553525] ffffffff8130c141 ffff88042a308098 ffff88042a308000 0000000000000000
[ 69.560996] ffff8804284e77a8 ffffffff81961ef1 ffff880428a6bc88 ffffffff8130c2b8
[ 69.568450] Call Trace:
[ 69.571044] [<ffffffff8130c141>] pci_restore_state.part.18+0xf1/0x250
[ 69.577706] [<ffffffff8130c2b8>] pci_restore_state+0x18/0x20
[ 69.583591] [<ffffffff8130f7fc>] pci_pm_restore_noirq+0x4c/0xd0
[ 69.589734] [<ffffffff8130f7b0>] ? pci_pm_freeze_noirq+0xf0/0xf0
[ 69.595966] [<ffffffff8146e847>] dpm_run_callback+0x77/0x2a0
[ 69.601850] [<ffffffff8146eb03>] device_resume_noirq+0x93/0x150
[ 69.607994] [<ffffffff8146ebdd>] async_resume_noirq+0x1d/0x50
[ 69.613967] [<ffffffff81078a06>] async_run_entry_fn+0x46/0xf0
[ 69.619939] [<ffffffff8106f548>] process_one_work+0x1f8/0x640
[ 69.625910] [<ffffffff8106f4a4>] ? process_one_work+0x154/0x640
[ 69.632054] [<ffffffff8106f9db>] worker_thread+0x4b/0x440
[ 69.637677] [<ffffffff8106f990>] ? process_one_work+0x640/0x640
[ 69.643822] [<ffffffff81075e86>] kthread+0xf6/0x110
[ 69.648927] [<ffffffff81075d90>] ? kthread_create_on_node+0x1f0/0x1f0
[ 69.655591] [<ffffffff816c893f>] ret_from_fork+0x3f/0x70
[ 69.661128] [<ffffffff81075d90>] ? kthread_create_on_node+0x1f0/0x1f0
[ 69.667794] Code: 66 89 4d ee 0f b7 c9 e8 79 41 fe ff 48 89 df e8 d1 7a ce ff 0f b6 53 4b 8b 73 38 48 8d 4d ee 48 8b 7b 10 83 c2 02 e8 1a 31 fe ff <41> 0f b6 4c 24 34 41 8b 54 24 30 be ff ff ff ff c0 e9 04 83 e1
[ 69.687986] RIP [<ffffffff81321296>] pci_restore_msi_state+0x196/0x240
[ 69.694772] RSP <ffff880428a6bc28>
[ 69.698412] CR2: 0000000000000034
[ 69.701879] ---[ end trace 814dd8cc56e427ae ]---
This happens at resume - I caught the output over serial - screen is
dead, it doesn't show anything because it simply locks up/panics.
> ... Oh well. New patch below.
Yep, this one took care of the warning in
drm_helper_choose_encoder_dpms(). Thanks!
Now I need to go decypher that NULL ptr deref above.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
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