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hp-wmi: check that an input device exists in resume handler

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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>
This commit is contained in:
Frans Pop 2009-07-30 17:16:05 -04:00 committed by Len Brown
parent 4be3bd7849
commit daed953721
1 changed files with 7 additions and 5 deletions
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12
drivers/platform/x86/hp-wmi.c
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@ -520,11 +520,13 @@ static int hp_wmi_resume_handler(struct platform_device *device)
* the input layer will only actually pass it on if the state
* changed.
*/
input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
hp_wmi_tablet_state());
input_sync(hp_wmi_input_dev);
if (hp_wmi_input_dev) {
input_report_switch(hp_wmi_input_dev, SW_DOCK,
hp_wmi_dock_state());
input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
hp_wmi_tablet_state());
input_sync(hp_wmi_input_dev);
}
return 0;
}