\r
EHCI transfer scheduling routines.\r
\r
-Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2007 - 2011, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution. The full text of the license may be found at\r
UINTN Index;\r
UINTN Loop;\r
BOOLEAN Finished;\r
+ BOOLEAN InfiniteLoop;\r
\r
- Status = EFI_SUCCESS;\r
- Loop = (TimeOut * EHC_1_MILLISECOND / EHC_SYNC_POLL_INTERVAL) + 1;\r
- Finished = FALSE;\r
+ Status = EFI_SUCCESS;\r
+ Loop = (TimeOut * EHC_1_MILLISECOND / EHC_SYNC_POLL_INTERVAL) + 1;\r
+ Finished = FALSE;\r
+ InfiniteLoop = FALSE;\r
\r
- for (Index = 0; Index < Loop; Index++) {\r
+ //\r
+ // According to UEFI spec section 16.2.4, If Timeout is 0, then the caller\r
+ // must wait for the function to be completed until EFI_SUCCESS or EFI_DEVICE_ERROR\r
+ // is returned.\r
+ //\r
+ if (TimeOut == 0) {\r
+ InfiniteLoop = TRUE;\r
+ }\r
+\r
+ for (Index = 0; InfiniteLoop || (Index < Loop); Index++) {\r
Finished = EhcCheckUrbResult (Ehc, Urb);\r
\r
if (Finished) {\r