From: Michel Dänzer Date: Wed, 8 Jan 2014 02:40:20 +0000 (+0900) Subject: radeon/pm: Guard access to rdev->pm.power_state array X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=370169516e736edad3b3c5aa49858058f8b55195;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git radeon/pm: Guard access to rdev->pm.power_state array It's never allocated on systems without an ATOMBIOS or COMBIOS ROM. Should fix an oops I encountered while resetting the GPU after a lockup on my PowerBook with an RV350. Signed-off-by: Michel Dänzer Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c index c0ff2002dc8e..0b24c4c7dcf9 100644 --- a/drivers/gpu/drm/radeon/radeon_pm.c +++ b/drivers/gpu/drm/radeon/radeon_pm.c @@ -1010,8 +1010,10 @@ static void radeon_pm_resume_old(struct radeon_device *rdev) rdev->pm.current_clock_mode_index = 0; rdev->pm.current_sclk = rdev->pm.default_sclk; rdev->pm.current_mclk = rdev->pm.default_mclk; - rdev->pm.current_vddc = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage; - rdev->pm.current_vddci = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.vddci; + if (rdev->pm.power_state) { + rdev->pm.current_vddc = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage; + rdev->pm.current_vddci = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.vddci; + } if (rdev->pm.pm_method == PM_METHOD_DYNPM && rdev->pm.dynpm_state == DYNPM_STATE_SUSPENDED) { rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;