Commit ee983463 authored by Brian Norris's avatar Brian Norris Committed by Greg Kroah-Hartman
Browse files

usb: ehci-pci: Set PROBE_PREFER_ASYNCHRONOUS 



This driver often takes on the order of 8ms to start, but every little
bit counts. It shouldn't have many cross-device dependencies to
race with, nor racy access to shared state with other drivers, so this
should be a relatively low risk change.

This driver was pinpointed as part of a survey of top slowest initcalls
(i.e., are built in, and probing synchronously) on a lab of ChromeOS
systems.

Signed-off-by: default avatarBrian Norris <briannorris@chromium.org>
Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20221028184507.v2.1.I9a5353f81d1509f85f3a04f0cdc9099f6fe60811@changeid


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4567d1a9

drivers/usb/host/ehci-pci.c

+4 −3
Original line number Diff line number Diff line
@@ -411,11 +411,12 @@ static struct pci_driver ehci_pci_driver = { 
	.remove =	ehci_pci_remove,

	.shutdown = 	usb_hcd_pci_shutdown,



#ifdef CONFIG_PM

	.driver =	{

		.pm =	&usb_hcd_pci_pm_ops

	},

#ifdef CONFIG_PM

		.pm =	&usb_hcd_pci_pm_ops,

#endif

		.probe_type = PROBE_PREFER_ASYNCHRONOUS,

	},

};



static int __init ehci_pci_init(void)