From fae5f627a092ca3b3c79d0da050e6ff41c67f53f Mon Sep 17 00:00:00 2001
From: Benjamin Dobell <benjamin.dobell+git@glassechidna.com.au>
Date: Sat, 21 Feb 2015 03:38:07 +1100
Subject: Implemented hack to make WinUSB play nice with empty receive
 transfers

---
 heimdall/source/BridgeManager.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/heimdall/source/BridgeManager.cpp b/heimdall/source/BridgeManager.cpp
index 1065795..b7bff3d 100644
--- a/heimdall/source/BridgeManager.cpp
+++ b/heimdall/source/BridgeManager.cpp
@@ -650,6 +650,14 @@ bool BridgeManager::SendBulkTransfer(unsigned char *data, int length, int timeou
 
 int BridgeManager::ReceiveBulkTransfer(unsigned char *data, int length, int timeout, bool retry) const
 {
+	if (data == nullptr)
+	{
+		// HACK: It seems WinUSB ignores us when we try to read with length zero.
+		static unsigned char dummyData;
+		data = &dummyData;
+		length = 1;
+	}
+
 	int dataTransferred;
 	int result = libusb_bulk_transfer(deviceHandle, inEndpoint, data, length, &dataTransferred, timeout);
 
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