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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>
This commit is contained in:
Brian Norris 2022-10-28 18:45:34 -07:00 committed by Greg Kroah-Hartman
parent 4567d1a97f
commit ee9834636f
1 changed files with 4 additions and 3 deletions
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7
drivers/usb/host/ehci-pci.c
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@ -411,11 +411,12 @@ static struct pci_driver ehci_pci_driver = {
.remove = ehci_pci_remove, .remove = ehci_pci_remove,
.shutdown = usb_hcd_pci_shutdown, .shutdown = usb_hcd_pci_shutdown,
#ifdef CONFIG_PM
.driver = { .driver = {
.pm = &usb_hcd_pci_pm_ops #ifdef CONFIG_PM
}, .pm = &usb_hcd_pci_pm_ops,
#endif #endif
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
}; };
static int __init ehci_pci_init(void) static int __init ehci_pci_init(void)