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drm/radeon/kms/atom: fix possible segfault in pm setup

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commit 4376eee92e 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>
This commit is contained in:
Alexander Müller
2011-12-30 12:55:48 -05:00
committed by Greg Kroah-Hartman
parent b7ef0c519d
commit e5697e5158
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/radeon/radeon_atombios.c
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@@ -2568,7 +2568,11 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
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)