Re: [PATCH] drm/amd/display: fix sysfs amdgpu_current_backlight_pwm NULL pointer issue

[AMD Public Use] Acked-by: Alex Deucher From: Wang, Kevin(Yang) Sent: Tuesday, December 29, 2020 1:21 AM To: amd-gfx@lists.freedesktop.org ; Wentland, Harry Cc: Deucher, Alexander ; Wang, Kevin(Yang) Subject: [PATCH] drm/amd/display: fix sysfs

[PATCH] drm/amd/display: fix sysfs amdgpu_current_backlight_pwm NULL pointer issue

fix NULL pointer issue when read sysfs amdgpu_current_backlight_pwm sysfs node. calltrace: [ 248.273833] BUG: kernel NULL pointer dereference, address: 0130 [ 248.273930] #PF: supervisor read access in kernel mode [ 248.273993] #PF: error_code(0x) - not-present page [