58/77: [USBPORT] Add USB2_ChangePeriod().

[Vadim Galyant]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=0558635f98c236568a7fe…

commit 0558635f98c236568a7fe36ca297b377962b5348
Author:     Vadim Galyant <vgal(a)rambler.ru>
AuthorDate: Sat Dec 16 22:26:50 2017 +0900
Commit:     Amine Khaldi <amine.khaldi(a)reactos.org>
CommitDate: Sun Jan 21 19:35:55 2018 +0100

    [USBPORT] Add USB2_ChangePeriod().
---
 drivers/usb/usbport/usb2.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/drivers/usb/usbport/usb2.c b/drivers/usb/usbport/usb2.c
index a9ba071b08..642271903a 100644
--- a/drivers/usb/usbport/usb2.c
+++ b/drivers/usb/usbport/usb2.c
@@ -1660,6 +1660,32 @@ USB2_AllocateTimeForEndpoint(IN PUSB2_TT_ENDPOINT TtEndpoint,
     return Result;
 }
 
+BOOLEAN
+NTAPI
+USB2_ChangePeriod(IN PUSB2_TT_ENDPOINT TtEndpoint,
+                  IN PUSB2_REBALANCE Rebalance,
+                  IN PULONG RebalanceListEntries)
+{
+    BOOLEAN Result;
+
+    DPRINT("USB2_ChangePeriod: RebalanceListEntries - %X\n",
+           *RebalanceListEntries);
+
+    USB2_DeallocateEndpointBudget(TtEndpoint,
+                                  Rebalance,
+                                  RebalanceListEntries,
+                                  USB2_FRAMES);
+
+    TtEndpoint->PreviosPeriod = TtEndpoint->Period;
+    TtEndpoint->Period = ENDPOINT_INTERRUPT_1ms;
+
+    Result = USB2_AllocateTimeForEndpoint(TtEndpoint,
+                                          Rebalance,
+                                          RebalanceListEntries);
+
+    return Result;
+}
+
 BOOLEAN
 NTAPI
 USB2_PromotePeriods(IN PUSB2_TT_ENDPOINT TtEndpoint,