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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Unclaimed register detected before writing to register 0x20a8"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92740#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Unclaimed register detected before writing to register 0x20a8"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92740">bug 92740</a>
from <span class="vcard"><a class="email" href="mailto:andrew@lunn.ch" title="andrew@lunn.ch">andrew@lunn.ch</a>
</span></b>
<pre>drm-intel-nightly: e005db1cb2c60d18abe837ac683d8993ea77b239
Not much different, still register 0x20a8.
[ 345.855806] ------------[ cut here ]------------
[ 345.855836] WARNING: CPU: 3 PID: 573 at
drivers/gpu/drm/i915/intel_uncore.c:804 __unclaimed_reg_debug+0x63/0x70 [i915]
[ 345.855839] Unclaimed register detected before writing to register 0x20a8
[ 345.855840] Modules linked in: joydev intel_rapl x86_pkg_temp_thermal
intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul
snd_hda_codec_hdmi crc32_pclmul ghash_clmulni_intel i915 sha256_ssse3
sha256_generic hmac drbg ansi_cprng aesni_intel ir_lirc_codec lirc_dev arc4
btusb aes_x86_64 btrtl iTCO_wdt lrw gf128mul iTCO_vendor_support rc_rc6_mce
btbcm glue_helper iwlmvm mac80211 nuvoton_cir snd_hda_codec_realtek
snd_hda_codec_generic evdev sg btintel ablk_helper video snd_soc_sst_acpi
rc_core snd_soc_sst_match bluetooth cryptd iwlwifi snd_hda_intel cfg80211
psmouse pcspkr serio_raw rfkill snd_hda_codec drm_kms_helper snd_hda_core drm
snd_hwdep snd_pcm dw_dmac i2c_designware_platform i2c_designware_core i2c_i801
i2c_algo_bit dw_dmac_core snd_timer battery snd shpchp mei_me lpc_ich soundcore
[ 345.855877] button mfd_core mei tpm_tis acpi_pad tpm tun autofs4 ext4 crc16
jbd2 mbcache hid_logitech_hidpp sd_mod hid_logitech_dj usbhid ahci libahci
crc32c_intel ehci_pci ehci_hcd libata xhci_pci xhci_hcd e1000e scsi_mod ptp
usbcore pps_core usb_common fan thermal sdhci_acpi sdhci mmc_core i2c_hid hid
[ 345.855896] CPU: 3 PID: 573 Comm: Xorg Not tainted 4.6.0-rc5+ #8
[ 345.855897] Hardware name: /NUC5i3RYB, BIOS
RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
[ 345.855899] 0000000000000000 ffffffff812e26c5 ffff88009ddffb10
0000000000000000
[ 345.855901] ffffffff810749be 00000000000020a8 ffff88009ddffb60
0000000000000000
[ 345.855904] 00000000fffffefe ffff88024c050098 0000000000000002
ffffffff81074a2f
[ 345.855906] Call Trace:
[ 345.855910] [<ffffffff812e26c5>] ? dump_stack+0x5c/0x77
[ 345.855914] [<ffffffff810749be>] ? __warn+0xbe/0xe0
[ 345.855916] [<ffffffff81074a2f>] ? warn_slowpath_fmt+0x4f/0x60
[ 345.855919] [<ffffffff810b112e>] ? __wake_up_common+0x4e/0x90
[ 345.855940] [<ffffffffa087b8f3>] ? __unclaimed_reg_debug+0x63/0x70 [i915]
[ 345.855958] [<ffffffffa087f474>] ? gen8_write32+0x244/0x270 [i915]
[ 345.855979] [<ffffffffa0870586>] ? gen8_logical_ring_get_irq+0x86/0xd0
[i915]
[ 345.855998] [<ffffffffa085e089>] ? __i915_wait_request+0x5d9/0x660 [i915]
[ 345.856002] [<ffffffff810b1810>] ? wake_atomic_t_function+0x60/0x60
[ 345.856021] [<ffffffffa085e1c5>] ?
i915_gem_object_wait_rendering__nonblocking+0xb5/0x250 [i915]
[ 345.856025] [<ffffffff8152eeb0>] ? unix_stream_recvmsg+0x40/0x50
[ 345.856045] [<ffffffffa0861da4>] ? i915_gem_set_domain_ioctl+0x94/0x150
[i915]
[ 345.856057] [<ffffffffa03d1561>] ? drm_ioctl+0x131/0x4c0 [drm]
[ 345.856075] [<ffffffffa0861d10>] ?
i915_gem_object_set_to_gtt_domain+0x180/0x180 [i915]
[ 345.856078] [<ffffffff811d4b4f>] ? do_readv_writev+0x11f/0x210
[ 345.856081] [<ffffffff812eaf54>] ? timerqueue_add+0x54/0xa0
[ 345.856083] [<ffffffff810d8e08>] ? enqueue_hrtimer+0x38/0x80
[ 345.856085] [<ffffffff810d9852>] ? hrtimer_start_range_ns+0x1c2/0x3b0
[ 345.856088] [<ffffffff811e728d>] ? do_vfs_ioctl+0x8d/0x5a0
[ 345.856092] [<ffffffff8147823d>] ? __sys_recvmsg+0x5d/0x70
[ 345.856094] [<ffffffff811e7814>] ? SyS_ioctl+0x74/0x80
[ 345.856097] [<ffffffff8158a1f6>] ? entry_SYSCALL_64_fastpath+0x1e/0xa8
[ 345.856099] ---[ end trace a66e5680161c2490 ]---</pre>
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