[Bug 97666] Kernel "NULL pointer dereference" with MST monitor on HSW

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97666

--- Comment #23 from Carlos Santa <carlos.santa at intel.com> ---
Using the pre-builts drm-nightly kernels from
http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/ it looks like
the fix for the null pointer entered sometime between Oct 5 and Oct 6. I'll
continue the bisection tomorrow.

Bad commit - cod/tip/drm-intel-nightly/2016-10-05
(2e47fbed60d05480cfbd097c1912e6823c0310ee)

Goog commmit - cod/tip/drm-intel-nightly/2016-10-06
(2dff18acaa95a26b882a5f9910d7ded514f18415)

The delta between those two nightly builds:

csanta at graypixels:~/temp2/cod/tip/drm-intel-nightly/2016-10-05$ git log
--pretty=oneline
cod/tip/drm-intel-nightly/2016-10-06..cod/tip/drm-intel-nightly/2016-10-04
35ceb7ced7dc45fe6db94e36e3d36089557994f4 drm-intel-nightly:
2016y-10m-03d-20h-05m-29s UTC integration manifest
c649d02d17ff44a674531e59f62d789f020ab3df Merge remote-tracking branch
'origin/topic/core-for-CI' into drm-intel-nightly
8978146d3e9d0f82c375772e0afd437a7e14c40a Merge remote-tracking branch
'origin/topic/drm-misc' into drm-intel-nightly
e274358357f992003d3602c7bffccba5e65efbb6 Merge remote-tracking branch
'sound-upstream/for-next' into drm-intel-nightly
135b00745346d3b9b61c5fcde114c982a78a1401 Merge remote-tracking branch
'drm-upstream/drm-next' into drm-intel-nightly
50d07cc835486b055c320884e4c72e3d6e8b324c Merge remote-tracking branch
'origin/drm-intel-next-queued' into drm-intel-nightly
262f75a6288346db44038c63b7a95ee68f8b7bea drm: Undo damage to page_flip_ioctl
0c238e65d7dc62c5cae138cec720fec7baa07a24 drm/rockchip: analogix_dp: Refuse to
enable PSR if panel doesn't support it
a4cb6284e28b90761145f3ffa454a515ac4644ba drm/bridge: analogix_dp: Add
analogix_dp_psr_supported
6c4d6f9f997c5dafccb54b52167f0c4d0ea37874 drm/fb-helper: add
DRM_FB_HELPER_DEFAULT_OPS for fb_ops
e80559f71b0c35a099532c583e251f4faf572c95 drm: Document caveats around atomic
event handling
5bc0fc9a545641b19bdfa32911fd755b41b428ab drm/i915: Fix build when
!CONFIG_DEBUG_FS
26e19227e2d405af48ef53d421a3c5bc4b499a3d uapi: add missing install of
sync_file.h
844f9ee731472c7c8ce99851e7eafc98b8190293 drm: Simplify drm_printk to reduce
object size quite a bit
5a86d6fbff2e403ab9eb86d0997ee0f2435258bc drm/i915: Account for sink max TMDS
clock when checking the port clock
3be453e6cddf6eeca1cf69cdff750a31be011702 drm/i915: Replace a bunch of
connector->base.display_info with a local variable
462de098327ebcd63a09cbdf22df36efc1266bf9 drm/edid: Move dvi_dual/max_tmds_clock
parsing out from drm_edid_to_eld()
52655e01952a944fb889be7e56781572507148ad drm/edid: Clear the old cea_rev when
there's no CEA extension in the new EDID
dc4b7a0aa6d523acd8331f9590ab42d5348cc307 drm/edid: Reduce the number of times
we parse the CEA extension block
b5ec14f5eb6193a46e0d7854da70123504c4ab36 drm/edid: Don't pass around
drm_display_info needlessly
21da17eaa02bdf727a1e3141bdd603f2f79df407 drm/edid: Move dvi_dual/max_tmds_clock
to drm_display_info
84aa822007328e00386bde83760499ab146157fc drm/edid: Make max_tmds_clock kHz
instead of MHz
66f2d60f872f242c578263324e848479f6b7b786 drm/edid: Clear old
dvi_dual/max_tmds_clock before parsing the new EDID
1be05eabb2ae5af798f09300fc13ed008ff13c8a drm/edid: Clear old audio latency
values before parsing the new EDID
da2bf7e805921494df5ebe18e99c790b1fbb450c drm: Convert prime dma-buf <-> handle
to rbtree
0482bae6012924aa01b06e33431a57b9e971888c drm: Restore lost
drm_framebuffer_unreference in drm_mode_page_flip_ioctl
24454c2c4b4bfac5ea8b1d2ec6a61ea20abea6ab drm: Add frame CRC debugfs files only
for drivers that have CRTC
ea568478ad07e6dcf90fc02265760f703b50fb3d drm/i915: Put "cooked" vlank counters
in frame CRC lines
13fa0253d97a781bd52e836439827916a21ff2af drm/i915: Use new CRC debugfs API
48c787899882ec9c3e111a81801c82d10da17810 drm: Add API for capturing frame CRCs
21165bd933acd4b9d5bb81cc15cfa1fc1258ddc5 drm/i915/debugfs: Move out pipe CRC
code
849fccd258ec702381328c0a52442d268ff96082 Merge remote-tracking branch
'airlied/drm-next' into topic/drm-misc
bd233af436baccc9c600902b1726bcd0b6ada63d drm/sti: mark symbols static where
possible
490896bc2382b0ed77b78d6242103706b4d06fe4 drm/mediatek: mark symbols static
where possible
492ec801668a48db7751a8cf591a19c5f79ca57a drm/rockchip: mark symbols static
where possible
4e6ee0192b2d66083b56a3e0b863d556e642ffa7 drm/rockchip: add missing header
dependencies

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