[PATCH RESEND v7 1/1] usb: xhci: plat: Enable async suspend/resume

From: Robert Foss
Date: Fri Feb 10 2017 - 09:58:26 EST

From: Andrew Bresticker <abrestic@xxxxxxxxxxxx>

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@xxxxxxxxxxxx>
Tested-by: Andrew Bresticker <abrestic@xxxxxxxxxxxx>
Tested-by: Robert Foss <robert.foss@xxxxxxxxxxxxx>
Signed-off-by: Robert Foss <robert.foss@xxxxxxxxxxxxx>
drivers/usb/host/xhci-plat.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 3cf8e120c620..4d6741a0d8f8 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -257,6 +257,7 @@ static int xhci_plat_probe(struct platform_device *pdev)

+ device_enable_async_suspend(&pdev->dev);

return 0;