[Bug 86644] [IVB+ Bisected]3cc134e drm/i915: sanitize rps irq enabling

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86644

lu hua <huax.lu at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[IVB Bisected]3cc134e       |[IVB+ Bisected]3cc134e
                   |drm/i915: sanitize rps irq  |drm/i915: sanitize rps irq
                   |enabling                    |enabling

--- Comment #5 from lu hua <huax.lu at intel.com> ---
Test on IVB and BDW with latest drm-intel-nightly kernel, it still exists.
[root at x-ivb9 tests]# ./gem_reset_stats --run-subtest ban-blt
IGT-Version: 1.8-gf333981 (x86_64) (Linux:
3.18.0_drm-intel-nightly_34d267_20141209+ x86_64)
Subtest ban-blt: SUCCESS (11.983s)
Test requirement not met in function gem_require_ring, file
ioctl_wrappers.c:881:
Test requirement: gem_has_vebox(fd)

[ 1670.744506] ------------[ cut here ]------------
[ 1670.746330] WARNING: CPU: 3 PID: 20373 at
drivers/gpu/drm/i915/i915_irq.c:284 gen6_enable_rps_interrupts+0x34/0x94
[i915]()
[ 1670.748144] WARN_ON(dev_priv->rps.pm_iir)
[ 1670.748152] Modules linked in: snd_hda_codec_hdmi iTCO_wdt
iTCO_vendor_support snd_hda_codec_realtek snd_hda_codec_generic dm_mod dcdbas
serio_raw pcspkr i2c_i801 snd_hda_intel snd_hda_controller snd_hda_codec
lpc_ich mfd_core snd_hwdep snd_pcm snd_timer snd soundcore battery tpm_tis tpm
acpi_cpufreq i915 button video drm_kms_helper drm cfbfillrect cfbimgblt
cfbcopyarea
[ 1670.748154] CPU: 3 PID: 20373 Comm: kworker/3:1 Not tainted
3.18.0_drm-intel-nightly_34d267_20141209+ #2416
[ 1670.748154] Hardware name: Dell Inc. OptiPlex 9010/03JR84, BIOS A01
05/04/2012
[ 1670.748160] Workqueue: events intel_gen6_powersave_work [i915]
[ 1670.748161]  0000000000000000 0000000000000009 ffffffff8178d5e2
ffff8800d4a63d58
[ 1670.748162]  ffffffff8103a8cc ffff8800d4a85800 ffffffffa00b07e4
0000000000000297
[ 1670.748163]  ffff880002ff0000 ffff8800da8ba000 ffff880002ff86d8
0000000000060000
[ 1670.748163] Call Trace:
[ 1670.748167]  [<ffffffff8178d5e2>] ? dump_stack+0x41/0x51
[ 1670.748171]  [<ffffffff8103a8cc>] ? warn_slowpath_common+0x78/0x90
[ 1670.748178]  [<ffffffffa00b07e4>] ? gen6_enable_rps_interrupts+0x34/0x94
[i915]
[ 1670.748179]  [<ffffffff8103a97c>] ? warn_slowpath_fmt+0x45/0x4a
[ 1670.748185]  [<ffffffffa008bd8f>] ? __gen6_update_ring_freq+0x133/0x14f
[i915]
[ 1670.748190]  [<ffffffffa00b07e4>] ? gen6_enable_rps_interrupts+0x34/0x94
[i915]
[ 1670.748195]  [<ffffffffa008dba0>] ? intel_gen6_powersave_work+0xfa9/0xfca
[i915]
[ 1670.748197]  [<ffffffff8104bbed>] ? process_one_work+0x1ae/0x31c
[ 1670.748198]  [<ffffffff8104bfd5>] ? worker_thread+0x255/0x350
[ 1670.748200]  [<ffffffff8104bd80>] ? process_scheduled_works+0x25/0x25
[ 1670.748201]  [<ffffffff8104f81e>] ? kthread+0xc5/0xcd
[ 1670.748203]  [<ffffffff8104f759>] ? kthread_freezable_should_stop+0x40/0x40
[ 1670.748204]  [<ffffffff81792bec>] ? ret_from_fork+0x7c/0xb0
[ 1670.748205]  [<ffffffff8104f759>] ? kthread_freezable_should_stop+0x40/0x40
[ 1670.748206] ---[ end trace b0d8bb257298ce09 ]---

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