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hp-wmi: check that an input device exists in resume handler
Some systems may not support input events, or registering the input handler may have failed. So check that an input device exists before trying to set the docking and tablet mode state during resume. Fixes: http://bugzilla.kernel.org/show_bug.cgi?id=13865 Reported-and-tested-by: Cédric Godin <cedric@belbone.be> Signed-off-by: Frans Pop <elendil@planet.nl> Acked-by: Matthew Garrett <mjg59@srcf.ucam.org> Signed-off-by: Len Brown <len.brown@intel.com>
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1 changed files with 7 additions and 5 deletions
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@ -520,11 +520,13 @@ static int hp_wmi_resume_handler(struct platform_device *device)
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* the input layer will only actually pass it on if the state
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* changed.
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*/
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input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
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input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
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hp_wmi_tablet_state());
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input_sync(hp_wmi_input_dev);
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if (hp_wmi_input_dev) {
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input_report_switch(hp_wmi_input_dev, SW_DOCK,
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hp_wmi_dock_state());
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input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
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hp_wmi_tablet_state());
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input_sync(hp_wmi_input_dev);
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}
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return 0;
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}
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