[Bug 79311] Call trace originating from i915 referencing intel_wait_for_vblank()

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=79311

--- Comment #9 from Alan Bartlett <ajb at elrepo.org> ---
I am recategorising this as a regression.

Not present in the 3.15.X branch.

Observed in 3.16-rc3 to 3.16-rc7 candidates.

Present in 3.16

Trace --

[    0.880041] ------------[ cut here ]------------
[    0.880088] WARNING: CPU: 0 PID: 113 at
drivers/gpu/drm/i915/intel_display.c:861 intel_wait_for_vblank+0x209/0x210
[i915]()
[    0.880091] vblank wait timed out
[    0.880093] Modules linked in: firewire_ohci(+) ahci(+) libahci libata
firewire_core crc_itu_t yenta_socket i915(+) i2c_algo_bit drm_kms_helper drm
i2c_core video
[    0.880108] CPU: 0 PID: 113 Comm: systemd-udevd Not tainted
3.16.0-1.el7.elrepo.x86_64 #1
[    0.880111] Hardware name: Dell Inc. Latitude E5500                 
/0DW633, BIOS A19 06/13/2013
[    0.880113]  0000000000000000 00000000fed30d5f ffff8800d6f175e0
ffffffff8165a818
[    0.880118]  ffff8800d6f17628 ffff8800d6f17618 ffffffff81072cad
ffff880037ae0000
[    0.880121]  0000000000071040 0000000000000003 00000000fffb6f90
00000000000000aa
[    0.880126] Call Trace:
[    0.880134]  [<ffffffff8165a818>] dump_stack+0x45/0x56
[    0.880139]  [<ffffffff81072cad>] warn_slowpath_common+0x7d/0xa0
[    0.880142]  [<ffffffff81072d2c>] warn_slowpath_fmt+0x5c/0x80
[    0.880177]  [<ffffffffa00df3ae>] ? gen4_read32+0x4e/0xc0 [i915]
[    0.880200]  [<ffffffffa00eeb59>] intel_wait_for_vblank+0x209/0x210 [i915]
[    0.880225]  [<ffffffffa01256f0>] intel_tv_detect+0x220/0x570 [i915]
[    0.880232]  [<ffffffffa0090ac3>]
drm_helper_probe_single_connector_modes_merge_bits+0x293/0x3a0 [drm_kms_helper]
[    0.880236]  [<ffffffffa0090be3>]
drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
[    0.880241]  [<ffffffffa00929a0>]
drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
[    0.880245]  [<ffffffffa0093acd>] drm_fb_helper_initial_config+0x15d/0x4d0
[drm_kms_helper]
[    0.880268]  [<ffffffffa00df252>] ? gen4_write32+0x52/0xb0 [i915]
[    0.880290]  [<ffffffffa00ce06d>] ? i915_hpd_irq_setup+0xcd/0xe0 [i915]
[    0.880313]  [<ffffffffa010598f>] intel_fbdev_initial_config+0x1f/0x30
[i915]
[    0.880337]  [<ffffffffa01294ba>] i915_driver_load+0xf7a/0x1000 [i915]
[    0.880341]  [<ffffffff812fee08>] ? kobject_uevent_env+0x178/0x690
[    0.880345]  [<ffffffff81414027>] ? get_device+0x17/0x30
[    0.880348]  [<ffffffff81419b05>] ? klist_class_dev_get+0x15/0x20
[    0.880352]  [<ffffffff81648bda>] ? klist_add_tail+0x3a/0x40
[    0.880354]  [<ffffffff814159b9>] ? device_add+0x219/0x630
[    0.880370]  [<ffffffffa00314d6>] ? drm_sysfs_device_add+0xd6/0x120 [drm]
[    0.880380]  [<ffffffffa002d9bd>] drm_dev_register+0xad/0x100 [drm]
[    0.880391]  [<ffffffffa003054f>] drm_get_pci_dev+0x8f/0x1f0 [drm]
[    0.880410]  [<ffffffffa009f4bb>] i915_pci_probe+0x3b/0x60 [i915]
[    0.880414]  [<ffffffff81336365>] local_pci_probe+0x45/0xa0
[    0.880416]  [<ffffffff81337515>] ? pci_match_device+0xe5/0x110
[    0.880419]  [<ffffffff81337679>] pci_device_probe+0xf9/0x150
[    0.880422]  [<ffffffff81418c30>] driver_probe_device+0x90/0x3c0
[    0.880424]  [<ffffffff81419033>] __driver_attach+0x93/0xa0
[    0.880427]  [<ffffffff81418fa0>] ? __device_attach+0x40/0x40
[    0.880429]  [<ffffffff81416b73>] bus_for_each_dev+0x73/0xc0
[    0.880432]  [<ffffffff814186ce>] driver_attach+0x1e/0x20
[    0.880434]  [<ffffffff814182b0>] bus_add_driver+0x180/0x250
[    0.880436]  [<ffffffff81419814>] driver_register+0x64/0xf0
[    0.880440]  [<ffffffff81335cfc>] __pci_register_driver+0x4c/0x50
[    0.880450]  [<ffffffffa00307ba>] drm_pci_init+0x10a/0x140 [drm]
[    0.880452]  [<ffffffffa017f000>] ? 0xffffffffa017efff
[    0.880468]  [<ffffffffa017f089>] i915_init+0x89/0x90 [i915]
[    0.880472]  [<ffffffff81002144>] do_one_initcall+0xd4/0x210
[    0.880475]  [<ffffffff811a3972>] ? __vunmap+0xb2/0x100
[    0.880479]  [<ffffffff810f1ce8>] load_module+0x2018/0x2520
[    0.880482]  [<ffffffff810ed6d0>] ? store_uevent+0x70/0x70
[    0.880485]  [<ffffffff810ee2a9>] ? copy_module_from_fd.isra.47+0x129/0x180
[    0.880488]  [<ffffffff810f23a6>] SyS_finit_module+0xa6/0xd0
[    0.880491]  [<ffffffff81662ae9>] system_call_fastpath+0x16/0x1b
[    0.880493] ---[ end trace eacf7ec0f3643c84 ]---

-- 
You are receiving this mail because:
You are on the CC list for the bug.