The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From e9efaaa047b1aebda27b5b65f17c752eb079e51b Mon Sep 17 00:00:00 2001 From: Xiangliang Yu <Xiangliang.Yu@xxxxxxx> Date: Wed, 30 Nov 2016 14:07:16 +0800 Subject: [PATCH] drm/amd/powerplay: Fix potential NULL pointer issue MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit If doesn't enable dpm, the powerplay will not allocate memory for hw management. So, hw_init_power_state_table function will reference NULL pointer when resetting. Signed-off-by: Xiangliang Yu <Xiangliang.Yu@xxxxxxx> Reviewed-by: Rex Zhu <Rex.Zhu@xxxxxxx> Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx> Acked-by: Christian König <christian.koenig@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Cc: stable@xxxxxxxxxxxxxxx diff --git a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c index 51a36077b993..c81cf1412728 100644 --- a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c +++ b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c @@ -1004,12 +1004,12 @@ int amd_powerplay_reset(void *handle) if (ret) return ret; - hw_init_power_state_table(instance->hwmgr); - if ((amdgpu_dpm == 0) || cgs_is_virtualization_enabled(instance->smu_mgr->device)) return 0; + hw_init_power_state_table(instance->hwmgr); + if (eventmgr == NULL || eventmgr->pp_eventmgr_init == NULL) return -EINVAL; -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html