Mark yao 8415ab565d drm/rockchip: fix race with kms hotplug and fbdev ... According to the kerneldoc[0], should do fbdev setup before calling drm_kms_helper_poll_init(), otherwise, Kms hotplug event may race into fbdev helper initial, and fb_helper->dev may be NULL pointer, that would cause the bug: [ 0.735411] [00000200] *pgd=00000000f6ffe003, *pud=00000000f6ffe003, *pmd=0000000000000000 [ 0.736156] Internal error: Oops: 96000005 [#1] PREEMPT SMP [ 0.736648] Modules linked in: [ 0.736930] CPU: 2 PID: 20 Comm: kworker/2:0 Not tainted 4.4.41 #20 [ 0.737480] Hardware name: Rockchip RK3399 Board rev2 (BOX) (DT) [ 0.738020] Workqueue: events cdn_dp_pd_event_work [ 0.738447] task: ffffffc0f21f3100 ti: ffffffc0f2218000 task.ti: ffffffc0f2218000 [ 0.739109] PC is at mutex_lock+0x14/0x44 [ 0.739469] LR is at drm_fb_helper_hotplug_event+0x30/0x114 [ 0.756253] [<ffffff8008a344f4>] mutex_lock+0x14/0x44 [ 0.756260] [<ffffff8008445708>] drm_fb_helper_hotplug_event+0x30/0x114 [ 0.756271] [<ffffff8008473c84>] rockchip_drm_output_poll_changed+0x18/0x20 [ 0.756280] [<ffffff8008439fcc>] drm_kms_helper_hotplug_event+0x28/0x34 [ 0.756286] [<ffffff800846c444>] cdn_dp_pd_event_work+0x394/0x3c4 [ 0.756295] [<ffffff80080b2b38>] process_one_work+0x218/0x3e0 [ 0.756302] [<ffffff80080b3538>] worker_thread+0x2e8/0x404 [ 0.756308] [<ffffff80080b7e70>] kthread+0xe8/0xf0 [ 0.756316] [<ffffff8008082690>] ret_from_fork+0x10/0x40 [0]: https://01.org/linuxgraphics/gfx-docs/drm/gpu/drm-kms-helpers.html Signed-off-by: Mark Yao <mark.yao@rock-chips.com> Reviewed-by: Sandy huang <sandy.huang@rock-chips.com> Link: https://patchwork.freedesktop.org/patch/msgid/1501575103-20136-1-git-send-email-mark.yao@rock-chips.com		2017-08-04 16:09:46 +08:00
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analogix_dp-rockchip.c	Linux 4.12-rc5	2017-06-16 13:58:27 +10:00
cdn-dp-core.c	drm/rockchip: fix NULL check on devm_kzalloc() return value	2017-07-10 14:13:00 -04:00
cdn-dp-core.h	drm/rockchip: cdn-dp: retry to check sink count	2017-02-05 16:30:04 +08:00
cdn-dp-reg.c	drm/rockchip: cdn-dp: add more log for video config	2017-03-13 15:59:35 -04:00
cdn-dp-reg.h	drm/rockchip: cdn-dp: Correct PHY register address	2017-03-13 15:59:26 -04:00
dw_hdmi-rockchip.c	drm/rockchip: dw_hdmi: introduce the pclk for grf	2017-06-23 08:52:03 +08:00
dw-mipi-dsi.c	drm/rockchip/dsi: correct the grf_switch_reg name	2017-03-24 14:48:58 -04:00
inno_hdmi.c	drm: handle HDMI 2.0 VICs in AVI info-frames	2017-07-14 21:23:54 +03:00
inno_hdmi.h
Kconfig	drm/rockchip: Refactor the component match logic.	2017-03-24 14:48:58 -04:00
Makefile	drm/rockchip: Refactor the component match logic.	2017-03-24 14:48:58 -04:00
rockchip_drm_drv.c	drm/rockchip: fix race with kms hotplug and fbdev	2017-08-04 16:09:46 +08:00
rockchip_drm_drv.h	Merge remote-tracking branch 'airlied/drm-next' into drm-misc-next-fixes	2017-06-20 11:50:41 -04:00
rockchip_drm_fb.c	drm/atomic: implement drm_atomic_helper_commit_tail for runtime_pm users	2017-07-26 13:45:08 +02:00
rockchip_drm_fb.h
rockchip_drm_fbdev.c	drm/fb-helper: Automatically clean up fb_info	2017-02-07 21:36:28 +01:00
rockchip_drm_fbdev.h
rockchip_drm_gem.c	drm/rockchip: Use .dumb_map_offset and .dumb_destroy defaults	2017-07-29 14:00:35 +02:00
rockchip_drm_gem.h	drm/rockchip: Use .dumb_map_offset and .dumb_destroy defaults	2017-07-29 14:00:35 +02:00
rockchip_drm_psr.c	drm/rockchip: Fix up bug in psr state machine	2016-09-21 06:55:49 -07:00
rockchip_drm_psr.h	drm/rockchip: Don't key off vblank for psr	2016-09-21 06:55:47 -07:00
rockchip_drm_vop.c	drm/rockchip: vop: report error when check resource error	2017-08-04 16:09:44 +08:00
rockchip_drm_vop.h	drm/rockchip: vop: fix NV12 video display error	2017-08-04 16:09:39 +08:00
rockchip_vop_reg.c	drm/rockchip: vop: rk3328: fix overlay abnormal	2017-07-31 08:44:18 +08:00
rockchip_vop_reg.h	drm/rockchip: vop: add a series of vop support	2017-07-31 08:44:06 +08:00