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| author | Alexander Müller <serveralex@gmail.com> | 2011-12-30 12:55:48 -0500 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2012-01-03 09:17:16 +0000 |
| commit | 4376eee92e5a8332b470040e672ea99cd44c826a (patch) | |
| tree | d26e398b57d3d907423eb709f9e221d9fe1ab616 | |
| parent | 115e8e705e4be071b9e06ff72578e3b603f2ba65 (diff) | |
| download | linux-4376eee92e5a8332b470040e672ea99cd44c826a.tar.gz linux-4376eee92e5a8332b470040e672ea99cd44c826a.tar.bz2 linux-4376eee92e5a8332b470040e672ea99cd44c826a.zip | |
drm/radeon/kms/atom: fix possible segfault in pm setup
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>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_atombios.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c index d24baf30efcb..5082d17d14dc 100644 --- a/drivers/gpu/drm/radeon/radeon_atombios.c +++ b/drivers/gpu/drm/radeon/radeon_atombios.c @@ -2560,7 +2560,11 @@ 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) |