[Bug 66838] New: [ILK]igt/gem_write_read_ring_switch/blt2bsd causes *ERROR* bsd ring hung inside bo (0x952000 ctx 0) at 0x952004

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66838

          Priority: medium
            Bug ID: 66838
                CC: xunx.fang at intel.com, yangweix.shui at intel.com
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [ILK]igt/gem_write_read_ring_switch/blt2bsd causes
                    *ERROR* bsd ring hung inside bo (0x952000 ctx 0) at
                    0x952004
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 82351
  --> https://bugs.freedesktop.org/attachment.cgi?id=82351&action=edit
dmesg

System Environment:
--------------------------
Platform:       Ironlake
Kernel:    drm-intel-fixes 46a0b638f35b45fc13d3dc0deb6a7e17988170b2

Bug detailed description:
-------------------------
It happens on ironlake with drm-intel-fixes kernel and drm-intel-next-queued.
It's a new igt case.

output:
running subtest blt2bsd

Reproduce steps:
----------------
1. ./gem_write_read_ring_switch --run-subtest blt2bsd

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