Commit c70a1529 authored Apr 07, 2017 by Andrew Bresticker Committed by Greg Kroah-Hartman Apr 08, 2017

usb: xhci: plat: Enable async suspend/resume



USB host controllers can take a significant amount of time to suspend
and resume, adding several hundred miliseconds to the kernel resume
time. Since the XHCI controller has no outside dependencies (other than
clocks, which are suspended late/resumed early), allow it to suspend and
resume asynchronously.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Tested-by: Andrew Bresticker <abrestic@chromium.org>
Tested-by: Robert Foss <robert.foss@collabora.com>
Signed-off-by: Robert Foss <robert.foss@collabora.com>
Reviewed-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 4eebed9a

drivers/usb/host/xhci-plat.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -277,6 +277,8 @@ static int xhci_plat_probe(struct platform_device *pdev)
		if (ret)
		goto dealloc_usb2_hcd;

		device_enable_async_suspend(&pdev->dev);

		return 0;