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: Brian Norris <briannorris@chromium.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20221028184507.v2.1.I9a5353f81d1509f85f3a04f0cdc9099f6fe60811@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 17f8b6ea0c356da98441e76f35bb0c7270ee4d0e..4b148fe5e43b28f0b64167c679a1625db0fcfb98 100644 (file)
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -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)