Bug 1372924

Summary: 4.8.0-0.rc4.git3.1.fc26.x86_64: WARNING: CPU: 0 PID: 209 at drivers/gpu/drm/i915/intel_pm.c:7866 sandybridge_pcode_write+0x10f/0x1f0 [i915]
Product: [Fedora] Fedora Reporter: Tomasz Kłoczko <kloczko.tomasz>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: rawhideCC: gansalmon, ichavero, itamar, jonathan, kernel-maint, madhu.chinakonda, mchehab
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Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
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Clone Of: Environment:
Last Closed: 2017-12-02 23:49:39 UTC Type: Bug
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Tomasz Kłoczko 2016-09-03 21:15:51 UTC
from dmesg after reboot on 4.8.0-0.rc4.git3.1.fc26.x86_64:

[    5.765565] ------------[ cut here ]------------
[    5.765676] WARNING: CPU: 0 PID: 209 at drivers/gpu/drm/i915/intel_pm.c:7866 sandybridge_pcode_write+0x10f/0x1f0 [i915]
[    5.765738] Missing switch case (16) in gen6_check_mailbox_status
[    5.765741] Modules linked in: btrfs xor raid6_pq rtsx_pci_sdmmc mmc_core amdkfd amd_iommu_v2 crc32c_intel radeon i915 serio_raw r8169 i2c_algo_bit ttm drm_kms_helper
 mii rtsx_pci drm fjes video i2c_dev
[    5.765806] CPU: 0 PID: 209 Comm: kworker/0:2 Not tainted 4.8.0-0.rc4.git3.1.fc26.x86_64 #1
[    5.765809] Hardware name: Sony Corporation VPCSB2M9E/VAIO, BIOS R2087H4 06/15/2012
[    5.765885] Workqueue: events intel_gen6_powersave_work [i915]
[    5.765891]  0000000000000286 00000000c027e352 ffff8dbfce833c28 ffffffff88468ba3
[    5.765900]  ffff8dbfce833c78 0000000000000000 ffff8dbfce833c68 ffffffff880ae7ab
[    5.765908]  00001ebace833c70 ffff8dbfce340000 0000000000000008 0000000000000000
[    5.765915] Call Trace:
[    5.765924]  [<ffffffff88468ba3>] dump_stack+0x86/0xc3
[    5.765929]  [<ffffffff880ae7ab>] __warn+0xcb/0xf0
[    5.765933]  [<ffffffff880ae82f>] warn_slowpath_fmt+0x5f/0x80
[    5.766007]  [<ffffffffc0407aaf>] sandybridge_pcode_write+0x10f/0x1f0 [i915]
[    5.766069]  [<ffffffffc040967e>] intel_gen6_powersave_work+0x2be/0x1420 [i915]
[    5.766076]  [<ffffffff880ced1e>] process_one_work+0x23e/0x6f0
[    5.766080]  [<ffffffff880cec9a>] ? process_one_work+0x1ba/0x6f0
[    5.766088]  [<ffffffff880cf21e>] worker_thread+0x4e/0x490
[    5.766092]  [<ffffffff880cf1d0>] ? process_one_work+0x6f0/0x6f0
[    5.766098]  [<ffffffff880d6581>] kthread+0x101/0x120
[    5.766104]  [<ffffffff8810eab5>] ? trace_hardirqs_on_caller+0xf5/0x1b0
[    5.766112]  [<ffffffff888fb02f>] ret_from_fork+0x1f/0x40
[    5.766117]  [<ffffffff880d6480>] ? kthread_create_on_node+0x250/0x250
[    5.766122] ---[ end trace 1fc144c7adb57c7f ]---

Going back to last working kernel without problems (4.8.0-0.rc4.git0.1.fc26)

Comment 1 Tomasz Kłoczko 2016-09-15 15:51:36 UTC
Just for the record.
Bug still is present in latest kernel:

[    5.765505] ------------[ cut here ]------------
[    5.765612] WARNING: CPU: 1 PID: 231 at drivers/gpu/drm/i915/intel_pm.c:7866 sandybridge_pcode_write+0x10f/0x1f0 [i915]
[    5.765615] Missing switch case (16) in gen6_check_mailbox_status
[    5.765695] Modules linked in: btrfs xor raid6_pq amdkfd amd_iommu_v2 rtsx_pci_sdmmc radeon mmc_core i915 crc32c_intel serio_raw i2c_algo_bit drm_kms_helper ttm drm r
8169 rtsx_pci mii video fjes i2c_dev
[    5.765700] CPU: 1 PID: 231 Comm: kworker/1:2 Not tainted 4.8.0-0.rc5.git2.1.fc26.x86_64 #1
[    5.765701] Hardware name: Sony Corporation VPCSB2M9E/VAIO, BIOS R2087H4 06/15/2012
[    5.765763] Workqueue: events intel_gen6_powersave_work [i915]
[    5.765769]  0000000000000286 0000000081974c90 ffff8bf90f1e3c28 ffffffffa3468a73
[    5.765774]  ffff8bf90f1e3c78 0000000000000000 ffff8bf90f1e3c68 ffffffffa30ae80b
[    5.765781]  00001eba0f1e3c70 ffff8bf90e140000 0000000000000008 0000000000000000
[    5.765783] Call Trace:
[    5.765791]  [<ffffffffa3468a73>] dump_stack+0x86/0xc3
[    5.765797]  [<ffffffffa30ae80b>] __warn+0xcb/0xf0
[    5.765802]  [<ffffffffa30ae88f>] warn_slowpath_fmt+0x5f/0x80
[    5.765880]  [<ffffffffc02d4aaf>] sandybridge_pcode_write+0x10f/0x1f0 [i915]
[    5.765935]  [<ffffffffc02d667e>] intel_gen6_powersave_work+0x2be/0x1420 [i915]
[    5.765938]  [<ffffffffa30ced4e>] process_one_work+0x23e/0x6f0
[    5.765941]  [<ffffffffa30cecca>] ? process_one_work+0x1ba/0x6f0
[    5.765946]  [<ffffffffa30cf24e>] worker_thread+0x4e/0x490
[    5.765949]  [<ffffffffa30cf200>] ? process_one_work+0x6f0/0x6f0
[    5.765951]  [<ffffffffa30cf200>] ? process_one_work+0x6f0/0x6f0
[    5.765970]  [<ffffffffa30d65b1>] kthread+0x101/0x120
[    5.765977]  [<ffffffffa310ead5>] ? trace_hardirqs_on_caller+0xf5/0x1b0
[    5.765985]  [<ffffffffa38f9fef>] ret_from_fork+0x1f/0x40
[    5.765991]  [<ffffffffa30d64b0>] ? kthread_create_on_node+0x250/0x250
[    5.765996] ---[ end trace 82e8f171e55c4141 ]---

Comment 2 Tomasz Kłoczko 2017-12-02 23:49:39 UTC
Closing.