Messages in this thread Patch in this message | | | Date | Thu, 05 Jan 2012 14:44:54 -0800 | From | Greg KH <> | Subject | [69/73] drm/radeon/kms/atom: fix possible segfault in pm setup |
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3.0-stable review patch. If anyone has any objections, please let me know.
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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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