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drm: bridge: dw-hdmi: fixup kernel crash when reboot with hdmi connected

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when other devices bind failed,drm will unbind and re-bind all devices.
if don't cancel the delayed work but flush and destroy workqueue directly,
kernel point is likely to become NULL.

Change-Id: Ib48704186ee298cbd4daac1cdbbac5fb3906b6bb
Signed-off-by: algea.cao <algea.cao@rock-chips.com>
This commit is contained in:
algea.cao
2017-05-02 09:03:19 +08:00
committed by Algea Cao
parent db79b1540c
commit f51d77a8b5
1 changed files with 7 additions and 0 deletions
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7
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
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@@ -3879,6 +3879,13 @@ err_res:
static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
{
if (hdmi->irq)
disable_irq(hdmi->irq);
cancel_delayed_work(&hdmi->work);
flush_workqueue(hdmi->workqueue);
destroy_workqueue(hdmi->workqueue);
if (hdmi->audio && !IS_ERR(hdmi->audio))
platform_device_unregister(hdmi->audio);
if (hdmi->hdcp_dev && !IS_ERR(hdmi->hdcp_dev))