[reactos] 07/09: [USBHUB] Add a delay hack for USB boot

[Victor Perevertkin]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=d14d7e5b8cb18e0db32d58...

commit d14d7e5b8cb18e0db32d58cb2bec654d8abdb75d
Author:     Victor Perevertkin [e-mail]
AuthorDate: Sun Dec 20 18:23:43 2020 +0300
Commit:     Victor Perevertkin [e-mail]
CommitDate: Wed Jan 27 05:15:15 2021 +0300

[USBHUB] Add a delay hack for USB boot

CORE-7826
---
 drivers/usb/usbhub/pnp.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/usb/usbhub/pnp.c b/drivers/usb/usbhub/pnp.c
index e7203027cf0..c16fc287c69 100644
--- a/drivers/usb/usbhub/pnp.c
+++ b/drivers/usb/usbhub/pnp.c
@@ -1063,6 +1063,13 @@ USBH_FdoQueryBusRelations(IN PUSBHUB_FDO_EXTENSION HubExtension,

if (!(HubExtension->HubFlags & USBHUB_FDO_FLAG_DO_ENUMERATION))
     {
+        // FIXME: this delay makes devices discovery during early boot more reliable
+        LARGE_INTEGER Interval;
+        Status = STATUS_SUCCESS;
+        IoInvalidateDeviceRelations(HubExtension->LowerPDO, BusRelations);
+        Interval.QuadPart = -10000LL * 1000; // 1 sec.
+        KeDelayExecutionThread(KernelMode, FALSE, &Interval);
+
         DPRINT_ENUM("USBH_FdoQueryBusRelations: Skip enumeration\n");
         goto RelationsWorker;
     }