Mark Yao
dd3d3cbfee
FROMLIST: drm/rockchip: fix fbdev crash when not use DRM_FBDEV_EMULATION
[ 1.162571] Unable to handle kernel NULL pointer dereference at virtual address 00000200
[ 1.165656] Modules linked in:
[ 1.165941] CPU: 5 PID: 143 Comm: kworker/5:2 Not tainted 4.4.15 #237
[ 1.166506] Hardware name: Rockchip RK3399 Evaluation Board v1 (Android) (DT)
[ 1.167153] Workqueue: events output_poll_execute
[ 1.168231] PC is at mutex_lock+0x14/0x44
[ 1.168586] LR is at drm_fb_helper_hotplug_event+0x28/0xcc
[ 1.172192] [<ffffff8008982110>] mutex_lock+0x14/0x44
[ 1.172196] [<ffffff80084025a4>] drm_fb_helper_hotplug_event+0x28/0xcc
[ 1.172201] [<ffffff8008427ae4>] rockchip_drm_output_poll_changed+0x14/0x1c
[ 1.172204] [<ffffff80083f7c4c>] drm_kms_helper_hotplug_event+0x28/0x34
[ 1.172207] [<ffffff80083f7ddc>] output_poll_execute+0x150/0x198
[ 1.172212] [<ffffff80080b0ea8>] process_one_work+0x218/0x3dc
[ 1.172215] [<ffffff80080b1578>] worker_thread+0x24c/0x374
[ 1.172217] [<ffffff80080b5bcc>] kthread+0xdc/0xe4
[ 1.172222] [<ffffff8008084cd0>] ret_from_fork+0x10/0x40
Change-Id: I681b9260ad7f2e3cae5cd08a109dad89b3575c2c
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
(am from https://patchwork.kernel.org/patch/9262523)
2016-08-08 14:40:25 +08:00
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