[Bug 91866] New: WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits))

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91866

            Bug ID: 91866
           Summary: WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits))
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: chithanh at gentoo.org
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 118069
  --> https://bugs.freedesktop.org/attachment.cgi?id=118069&action=edit
dmesg

Hardware: Lenovo T440s (Haswell)
Since linux-4.2 I am seeing the following oops, which is similar but not
identical to the one in bug 87259:

[  431.068176] ------------[ cut here ]------------
[  431.068187] WARNING: CPU: 1 PID: 3868 at
drivers/gpu/drm/i915/i915_gem.c:5269 i915_gem_track_fb+0x69/0x107()
[  431.068189] WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits))
[  431.068190] Modules linked in:
[  431.068192]  rtsx_pci_sdmmc mmc_core iwlmvm mac80211 x86_pkg_temp_thermal
intel_powerclamp crct10dif_pclmul crc32_pclmul iwlwifi cfg80211 rtsx_pci mei_me
mei btusb btrtl btbcm btintel efivarfs
[  431.068207] CPU: 1 PID: 3868 Comm: X Tainted: G        W       4.2.0-gentoo
#2
[  431.068208] Hardware name: LENOVO 20ARS0BH00/20ARS0BH00, BIOS GJET84WW (2.34
) 06/22/2015
[  431.068210]  0000000000000009 ffff88030b253a78 ffffffff818526a1
0000000080000000
[  431.068213]  ffff88030b253ac8 ffff88030b253ab8 ffffffff810a45b5
ffff8800d5cb2880
[  431.068216]  ffffffff814a4465 ffff8800d5cb2880 ffff88030e408000
0000000000000010
[  431.068218] Call Trace:
[  431.068223]  [<ffffffff818526a1>] dump_stack+0x4f/0x7b
[  431.068228]  [<ffffffff810a45b5>] warn_slowpath_common+0x9c/0xb6
[  431.068231]  [<ffffffff814a4465>] ? i915_gem_track_fb+0x69/0x107
[  431.068234]  [<ffffffff810a4610>] warn_slowpath_fmt+0x41/0x43
[  431.068237]  [<ffffffff814a4465>] i915_gem_track_fb+0x69/0x107
[  431.068243]  [<ffffffff814db854>] intel_prepare_plane_fb+0x125/0x146
[  431.068247]  [<ffffffff8145bc73>] drm_atomic_helper_prepare_planes+0x53/0xb4
[  431.068250]  [<ffffffff814d507f>] __intel_set_mode+0x308/0x8fb
[  431.068254]  [<ffffffff814db436>] intel_crtc_set_config+0x3fb/0x4bf
[  431.068259]  [<ffffffff8146d2a5>] drm_mode_set_config_internal+0x54/0xe0
[  431.068261]  [<ffffffff81470e4a>] drm_mode_setcrtc+0x39f/0x419
[  431.068264]  [<ffffffff81464a6a>] drm_ioctl+0x37f/0x3f7
[  431.068266]  [<ffffffff81470aab>] ? drm_mode_setplane+0x164/0x164
[  431.068271]  [<ffffffff8119fa52>] do_vfs_ioctl+0x367/0x421
[  431.068275]  [<ffffffff8133498e>] ? selinux_file_ioctl+0xa1/0xa3
[  431.068279]  [<ffffffff8132fcac>] ? security_file_ioctl+0x30/0x44
[  431.068281]  [<ffffffff8119fb5a>] SyS_ioctl+0x4e/0x7c
[  431.068287]  [<ffffffff81859d5b>] entry_SYSCALL_64_fastpath+0x16/0x6e
[  431.068289] ---[ end trace e0452e0963bbfe78 ]---

In this kernel I had reverted d2944cf21305c754fa8b2d6c1eea05ad5dad7944 as per
bug 91511 comment 3, but the oops happens regardless of this patch being
reverted or not.

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