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Subject[PATCH 2/2] usb: xhci-pci: Set PROBE_PREFER_ASYNCHRONOUS
Date
This driver often takes on the order of 10ms to start, but in some cases
takes more than 100ms. 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>
---

drivers/usb/host/xhci-pci.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 40228a3d77a0..4da03de1be70 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -689,7 +689,8 @@ static struct pci_driver xhci_pci_driver = {
.shutdown = usb_hcd_pci_shutdown,
#ifdef CONFIG_PM
.driver = {
- .pm = &usb_hcd_pci_pm_ops
+ .pm = &usb_hcd_pci_pm_ops,
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
#endif
};
--
2.38.1.273.g43a17bfeac-goog
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