From: Alexander Müller Date: Fri, 30 Dec 2011 17:55:48 +0000 (-0500) Subject: drm/radeon/kms/atom: fix possible segfault in pm setup X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4376eee92e5a8332b470040e672ea99cd44c826a;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git 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 Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie --- 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)