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Input: hyperv-keyboard - register as a wakeup source 

With this patch, we can press a key to wake up the VM after the VM executes
"echo freeze > /sys/power/state".

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dexuan Cui 2014-08-06 13:33:54 -07:00 committed by Dmitry Torokhov
parent e179d5fa8d
commit 62238f3aad
1 changed files with 13 additions and 0 deletions
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13
drivers/input/serio/hyperv-keyboard.c
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@ -170,6 +170,15 @@ static void hv_kbd_on_receive(struct hv_device *hv_dev,
serio_interrupt(kbd_dev->hv_serio, scan_code, 0);
}
spin_unlock_irqrestore(&kbd_dev->lock, flags);
/*
* Only trigger a wakeup on key down, otherwise
* "echo freeze > /sys/power/state" can't really enter the
* state because the Enter-UP can trigger a wakeup at once.
*/
if (!(info & IS_BREAK))
pm_wakeup_event(&hv_dev->device, 0);
break;
default:
@ -376,6 +385,9 @@ static int hv_kbd_probe(struct hv_device *hv_dev,
goto err_close_vmbus;
serio_register_port(kbd_dev->hv_serio);
device_init_wakeup(&hv_dev->device, true);
return 0;
err_close_vmbus:
@ -390,6 +402,7 @@ static int hv_kbd_remove(struct hv_device *hv_dev)
{
struct hv_kbd_dev *kbd_dev = hv_get_drvdata(hv_dev);
device_init_wakeup(&hv_dev->device, false);
serio_unregister_port(kbd_dev->hv_serio);
vmbus_close(hv_dev->channel);
kfree(kbd_dev);