hid: enable hid device to suspend/resume asynchronously

Enable hid device to suspend/resume asynchronously. This can improve system suspend/resume speed.

Signed-off-by Zhonghui Fu <[email protected]>

---
 drivers/hid/hid-core.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

drivers/hid/hid-core.c +1 -1

index e6fce23..27ac160 100644
@@ -2627,6 +2627,7 @@ struct hid_device *hid_allocate_device(void)
 	device_initialize(&hdev->dev);
 	hdev->dev.release = hid_device_release;
 	hdev->dev.bus = &hid_bus_type;
+	device_enable_async_suspend(&hdev->dev);
 
 	hid_close_report(hdev);
 
-- 1.7.1

Enable hid device to suspend/resume asynchronously. This can improve system suspend/resume speed.

Quoted 2 lines · Zhonghui

Enable hid device to suspend/resume asynchronously. This can improve system suspend/resume speed.

How well was this tested?

Power management is notorious for not being really in excellent shape on many HID devices.

So I'd like to be careful.

Thanks,

Quoted 8 lines

Quoted 2 lines

Enable hid device to suspend/resume asynchronously. This can improve system suspend/resume speed.

How well was this tested?

Power management is notorious for not being really in excellent shape on many HID devices.

So I'd like to be careful.

I were on leave these days, so sorry for late reply.

This can reduce system suspend/resume time about 20ms, from 1030ms to 1010ms on ASUS T100TA machine. Although the improvement is not very significant, but this can let your parent/child device suspend/resume more asynchronously and take advantage of multicore to improve overall system suspend/resume speed.

I have resent this patch with updated commit message - "[PATCH v2] hid:
enable hid device to suspend/resume asynchronously".