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    Subject[69/73] drm/radeon/kms/atom: fix possible segfault in pm setup
    3.0-stable review patch.  If anyone has any objections, please let me know.

    ------------------
    Content-Length: 1216
    Lines: 36

    From: =?UTF-8?q?Alexander=20M=C3=BCller?= <serveralex@gmail.com>

    commit 4376eee92e5a8332b470040e672ea99cd44c826a upstream.

    If we end up with no power states, don't look up
    current vddc.

    fixes:
    https://bugs.freedesktop.org/show_bug.cgi?id=44130

    agd5f: fix patch formatting

    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Dave Airlie <airlied@redhat.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    drivers/gpu/drm/radeon/radeon_atombios.c | 6 +++++-
    1 file changed, 5 insertions(+), 1 deletion(-)

    --- a/drivers/gpu/drm/radeon/radeon_atombios.c
    +++ b/drivers/gpu/drm/radeon/radeon_atombios.c
    @@ -2568,7 +2568,11 @@ void radeon_atombios_get_power_modes(str

    rdev->pm.current_power_state_index = rdev->pm.default_power_state_index;
    rdev->pm.current_clock_mode_index = 0;
    - rdev->pm.current_vddc = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage;
    + if (rdev->pm.default_power_state_index >= 0)
    + rdev->pm.current_vddc =
    + rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage;
    + else
    + rdev->pm.current_vddc = 0;
    }

    void radeon_atom_set_clock_gating(struct radeon_device *rdev, int enable)



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