[Bug 84855] [ILK Regression]igt kms_rotation_crc/sprite-rotatio causes system hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84855

--- Comment #1 from lu hua <huax.lu at intel.com> ---
I tried to bisect it twice, bisect shows:
8525b5ec90a58b3e56709ffa1667d6593dbe24c3 is the first bad commit. But revert
this commit, the hang still exists.
commit 8525b5ec90a58b3e56709ffa1667d6593dbe24c3
Author: YoungJun Cho <yj44.cho at samsung.com>
Date:   Thu Aug 14 11:22:36 2014 +0900

    drm/exynos: dsi: fix exynos_dsi_set_pll() wrong return value

    The type of this function is unsigned long, and it is expected
    to return proper fout value or zero if something is wrong.
    So this patch fixes wrong return value for error cases.

    Signed-off-by: YoungJun Cho <yj44.cho at samsung.com>
    Acked-by: Inki Dae <inki.dae at samsung.com>
    Acked-by: Kyungmin Park <kyungmin.park at samsung.com>
    Acked-by: Andrzej Hajda <a.hajda at samsung.com>
    Signed-off-by: Inki Dae <inki.dae at samsung.com>

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