Refactored Host mode Class Driver *_Host_ConfigurePipes() routines to be more space efficient when compiled.

Added new *_ENUMERROR_PipeConfigurationFailed error codes for the *_Host_ConfigurePipes() routines.

LUFA/Drivers/USB/Class/Device/CDC.c

@@ -134,7 +134,7 @@ bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_Device_t* const CDCInterfac
 		}
 
 		if (!(Endpoint_ConfigureEndpoint(EndpointNum, Type, Direction, Size,
-										 DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
+		                                 DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
 		{
 			return false;
 		}

LUFA/Drivers/USB/Class/Device/MIDI.c

@@ -67,7 +67,7 @@ bool MIDI_Device_ConfigureEndpoints(USB_ClassInfo_MIDI_Device_t* const MIDIInter
 		}
 
 		if (!(Endpoint_ConfigureEndpoint(EndpointNum, Type, Direction, Size,
-										 DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
+		                                 DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
 		{
 			return false;
 		}

LUFA/Drivers/USB/Class/Device/MassStorage.c

@@ -102,7 +102,7 @@ bool MS_Device_ConfigureEndpoints(USB_ClassInfo_MS_Device_t* const MSInterfaceIn
 		}
 
 		if (!(Endpoint_ConfigureEndpoint(EndpointNum, Type, Direction, Size,
-										 DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
+		                                 DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
 		{
 			return false;
 		}

LUFA/Drivers/USB/Class/Device/RNDIS.c

@@ -148,7 +148,7 @@ bool RNDIS_Device_ConfigureEndpoints(USB_ClassInfo_RNDIS_Device_t* const RNDISIn
 		}
 
 		if (!(Endpoint_ConfigureEndpoint(EndpointNum, Type, Direction, Size,
-										 DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
+		                                 DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
 		{
 			return false;
 		}

LUFA/Drivers/USB/Class/Host/CDC.c

@@ -100,31 +100,59 @@ uint8_t CDC_Host_ConfigurePipes(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo
 
 	for (uint8_t PipeNum = 1; PipeNum < PIPE_TOTAL_PIPES; PipeNum++)
 	{
+		uint16_t Size;
+		uint8_t  Type;
+		uint8_t  Token;
+		uint8_t  EndpointAddress;
+		uint8_t  InterruptPeriod;
+		bool     DoubleBanked;
+
 		if (PipeNum == CDCInterfaceInfo->Config.DataINPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_IN,
+			Size            = DataINEndpoint->EndpointSize;
-			                   DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize,
+			EndpointAddress = DataINEndpoint->EndpointAddress;
-			                   CDCInterfaceInfo->Config.DataINPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_IN;
+			Type            = EP_TYPE_BULK;
+			DoubleBanked    = CDCInterfaceInfo->Config.DataINPipeDoubleBank;
+			InterruptPeriod = 0;
 
 			CDCInterfaceInfo->State.DataINPipeSize = DataINEndpoint->EndpointSize;
 		}
 		else if (PipeNum == CDCInterfaceInfo->Config.DataOUTPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_OUT,
+			Size            = DataOUTEndpoint->EndpointSize;
-			                   DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize,
+			EndpointAddress = DataOUTEndpoint->EndpointAddress;
-			                   CDCInterfaceInfo->Config.DataOUTPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_OUT;
+			Type            = EP_TYPE_BULK;
+			DoubleBanked    = CDCInterfaceInfo->Config.DataOUTPipeDoubleBank;
+			InterruptPeriod = 0;
 
 			CDCInterfaceInfo->State.DataOUTPipeSize = DataOUTEndpoint->EndpointSize;
 		}
 		else if (PipeNum == CDCInterfaceInfo->Config.NotificationPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
+			Size            = NotificationEndpoint->EndpointSize;
-			                   NotificationEndpoint->EndpointAddress, NotificationEndpoint->EndpointSize,
+			EndpointAddress = NotificationEndpoint->EndpointAddress;
-			                   CDCInterfaceInfo->Config.NotificationPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_IN;
-			Pipe_SetInterruptPeriod(NotificationEndpoint->PollingIntervalMS);
+			Type            = EP_TYPE_INTERRUPT;
+			DoubleBanked    = CDCInterfaceInfo->Config.NotificationPipeDoubleBank;
+			InterruptPeriod = NotificationEndpoint->PollingIntervalMS;
 
 			CDCInterfaceInfo->State.NotificationPipeSize = NotificationEndpoint->EndpointSize;
 		}
+		else
+		{
+			continue;
+		}
+		
+		if (!(Pipe_ConfigurePipe(PipeNum, Type, Token, EndpointAddress, Size,
+		                         DoubleBanked ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE)))
+		{
+			return CDC_ENUMERROR_PipeConfigurationFailed;
+		}
+		
+		if (InterruptPeriod)
+		  Pipe_SetInterruptPeriod(InterruptPeriod);
 	}
 
 	CDCInterfaceInfo->State.ControlInterfaceNumber = CDCControlInterface->InterfaceNumber;

LUFA/Drivers/USB/Class/Host/CDC.h

@@ -139,6 +139,7 @@
 				CDC_ENUMERROR_NoError                    = 0, /**< Configuration Descriptor was processed successfully. */
 				CDC_ENUMERROR_InvalidConfigDescriptor    = 1, /**< The device returned an invalid Configuration Descriptor. */
 				CDC_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible CDC interface was not found in the device's Configuration Descriptor. */
+				CDC_ENUMERROR_PipeConfigurationFailed    = 3, /**< One or more pipes for the specified interface could not be configured correctly. */
 			};
 
 		/* Function Prototypes: */

LUFA/Drivers/USB/Class/Host/HID.c

@@ -95,25 +95,49 @@ uint8_t HID_Host_ConfigurePipes(USB_ClassInfo_HID_Host_t* const HIDInterfaceInfo
 
 	for (uint8_t PipeNum = 1; PipeNum < PIPE_TOTAL_PIPES; PipeNum++)
 	{
+		uint16_t Size;
+		uint8_t  Type;
+		uint8_t  Token;
+		uint8_t  EndpointAddress;
+		uint8_t  InterruptPeriod;
+		bool     DoubleBanked;
+
 		if (PipeNum == HIDInterfaceInfo->Config.DataINPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
+			Size            = DataINEndpoint->EndpointSize;
-			                   DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize,
+			EndpointAddress = DataINEndpoint->EndpointAddress;
-			                   HIDInterfaceInfo->Config.DataINPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_IN;
-			Pipe_SetInterruptPeriod(DataINEndpoint->PollingIntervalMS);
+			Type            = EP_TYPE_INTERRUPT;
-
+			DoubleBanked    = HIDInterfaceInfo->Config.DataINPipeDoubleBank;
-			HIDInterfaceInfo->State.DataINPipeSize = DataINEndpoint->EndpointSize;
+			InterruptPeriod = DataINEndpoint->PollingIntervalMS;
+
+			HIDInterfaceInfo->State.DataINPipeSize   = DataINEndpoint->EndpointSize;
 		}
 		else if (PipeNum == HIDInterfaceInfo->Config.DataOUTPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_INTERRUPT, PIPE_TOKEN_OUT,
+			Size            = DataOUTEndpoint->EndpointSize;
-			                   DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize,
+			EndpointAddress = DataOUTEndpoint->EndpointAddress;
-			                   HIDInterfaceInfo->Config.DataOUTPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_OUT;
-			Pipe_SetInterruptPeriod(DataOUTEndpoint->PollingIntervalMS);
+			Type            = EP_TYPE_INTERRUPT;
-
+			DoubleBanked    = HIDInterfaceInfo->Config.DataOUTPipeDoubleBank;
-			HIDInterfaceInfo->State.DataOUTPipeSize = DataOUTEndpoint->EndpointSize;
+			InterruptPeriod = DataOUTEndpoint->PollingIntervalMS;
+
+			HIDInterfaceInfo->State.DataOUTPipeSize   = DataOUTEndpoint->EndpointSize;
 			HIDInterfaceInfo->State.DeviceUsesOUTPipe = true;
 		}
+		else
+		{
+			continue;
+		}
+
+		if (!(Pipe_ConfigurePipe(PipeNum, Type, Token, EndpointAddress, Size,
+		                         DoubleBanked ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE)))
+		{
+			return HID_ENUMERROR_PipeConfigurationFailed;
+		}
+		
+		if (InterruptPeriod)
+		  Pipe_SetInterruptPeriod(InterruptPeriod);
 	}
 
 	HIDInterfaceInfo->State.InterfaceNumber      = HIDInterface->InterfaceNumber;

LUFA/Drivers/USB/Class/Host/HID.h

@@ -145,6 +145,7 @@
 				HID_ENUMERROR_NoError                    = 0, /**< Configuration Descriptor was processed successfully. */
 				HID_ENUMERROR_InvalidConfigDescriptor    = 1, /**< The device returned an invalid Configuration Descriptor. */
 				HID_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible HID interface was not found in the device's Configuration Descriptor. */
+				HID_ENUMERROR_PipeConfigurationFailed    = 3, /**< One or more pipes for the specified interface could not be configured correctly. */
 			};
 
 		/* Function Prototypes: */

LUFA/Drivers/USB/Class/Host/MIDI.c

@@ -79,22 +79,42 @@ uint8_t MIDI_Host_ConfigurePipes(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceI
 
 	for (uint8_t PipeNum = 1; PipeNum < PIPE_TOTAL_PIPES; PipeNum++)
 	{
+		uint16_t Size;
+		uint8_t  Type;
+		uint8_t  Token;
+		uint8_t  EndpointAddress;
+		bool     DoubleBanked;
+
 		if (PipeNum == MIDIInterfaceInfo->Config.DataINPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_IN,
+			Size            = DataINEndpoint->EndpointSize;
-			                   DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize,
+			EndpointAddress = DataINEndpoint->EndpointAddress;
-			                   MIDIInterfaceInfo->Config.DataINPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_IN;
+			Type            = EP_TYPE_BULK;
+			DoubleBanked    = MIDIInterfaceInfo->Config.DataINPipeDoubleBank;
 
 			MIDIInterfaceInfo->State.DataINPipeSize = DataINEndpoint->EndpointSize;
 		}
 		else if (PipeNum == MIDIInterfaceInfo->Config.DataOUTPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_OUT,
+			Size            = DataOUTEndpoint->EndpointSize;
-			                   DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize,
+			EndpointAddress = DataOUTEndpoint->EndpointAddress;
-			                   MIDIInterfaceInfo->Config.DataOUTPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_OUT;
+			Type            = EP_TYPE_BULK;
+			DoubleBanked    = MIDIInterfaceInfo->Config.DataOUTPipeDoubleBank;
 
 			MIDIInterfaceInfo->State.DataOUTPipeSize = DataOUTEndpoint->EndpointSize;
 		}
+		else
+		{
+			continue;
+		}
+
+		if (!(Pipe_ConfigurePipe(PipeNum, Type, Token, EndpointAddress, Size,
+		                         DoubleBanked ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE)))
+		{
+			return MIDI_ENUMERROR_PipeConfigurationFailed;
+		}
 	}
 
 	MIDIInterfaceInfo->State.InterfaceNumber = MIDIInterface->InterfaceNumber;

LUFA/Drivers/USB/Class/Host/MIDI.h

@@ -114,6 +114,7 @@
 				MIDI_ENUMERROR_NoError                    = 0, /**< Configuration Descriptor was processed successfully. */
 				MIDI_ENUMERROR_InvalidConfigDescriptor    = 1, /**< The device returned an invalid Configuration Descriptor. */
 				MIDI_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible MIDI interface was not found in the device's Configuration Descriptor. */
+				MIDI_ENUMERROR_PipeConfigurationFailed    = 3, /**< One or more pipes for the specified interface could not be configured correctly. */
 			};
 
 		/* Function Prototypes: */

LUFA/Drivers/USB/Class/Host/MassStorage.c

@@ -79,22 +79,42 @@ uint8_t MS_Host_ConfigurePipes(USB_ClassInfo_MS_Host_t* const MSInterfaceInfo,
 
 	for (uint8_t PipeNum = 1; PipeNum < PIPE_TOTAL_PIPES; PipeNum++)
 	{
+		uint16_t Size;
+		uint8_t  Type;
+		uint8_t  Token;
+		uint8_t  EndpointAddress;
+		bool     DoubleBanked;
+
 		if (PipeNum == MSInterfaceInfo->Config.DataINPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_IN,
+			Size            = DataINEndpoint->EndpointSize;
-			                   DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize,
+			EndpointAddress = DataINEndpoint->EndpointAddress;
-			                   MSInterfaceInfo->Config.DataINPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_IN;
+			Type            = EP_TYPE_BULK;
+			DoubleBanked    = MSInterfaceInfo->Config.DataINPipeDoubleBank;
 
 			MSInterfaceInfo->State.DataINPipeSize = DataINEndpoint->EndpointSize;
 		}
 		else if (PipeNum == MSInterfaceInfo->Config.DataOUTPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_OUT,
+			Size            = DataOUTEndpoint->EndpointSize;
-			                   DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize,
+			EndpointAddress = DataOUTEndpoint->EndpointAddress;
-			                   MSInterfaceInfo->Config.DataOUTPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_OUT;
-
+			Type            = EP_TYPE_BULK;
+			DoubleBanked    = MSInterfaceInfo->Config.DataOUTPipeDoubleBank;
+			
 			MSInterfaceInfo->State.DataOUTPipeSize = DataOUTEndpoint->EndpointSize;
 		}
+		else
+		{
+			continue;
+		}
+
+		if (!(Pipe_ConfigurePipe(PipeNum, Type, Token, EndpointAddress, Size,
+		                         DoubleBanked ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE)))
+		{
+			return MS_ENUMERROR_PipeConfigurationFailed;
+		}
 	}
 
 	MSInterfaceInfo->State.InterfaceNumber = MassStorageInterface->InterfaceNumber;

LUFA/Drivers/USB/Class/Host/MassStorage.h

@@ -131,6 +131,7 @@
 				MS_ENUMERROR_NoError                    = 0, /**< Configuration Descriptor was processed successfully. */
 				MS_ENUMERROR_InvalidConfigDescriptor    = 1, /**< The device returned an invalid Configuration Descriptor. */
 				MS_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible Mass Storage interface was not found in the device's Configuration Descriptor. */
+				MS_ENUMERROR_PipeConfigurationFailed    = 3, /**< One or more pipes for the specified interface could not be configured correctly. */
 			};
 
 		/* Function Prototypes: */

LUFA/Drivers/USB/Class/Host/Printer.c

@@ -79,22 +79,42 @@ uint8_t PRNT_Host_ConfigurePipes(USB_ClassInfo_PRNT_Host_t* const PRNTInterfaceI
 
 	for (uint8_t PipeNum = 1; PipeNum < PIPE_TOTAL_PIPES; PipeNum++)
 	{
+		uint16_t Size;
+		uint8_t  Type;
+		uint8_t  Token;
+		uint8_t  EndpointAddress;
+		bool     DoubleBanked;
+
 		if (PipeNum == PRNTInterfaceInfo->Config.DataINPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_IN,
+			Size            = DataINEndpoint->EndpointSize;
-			                   DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize,
+			EndpointAddress = DataINEndpoint->EndpointAddress;
-			                   PRNTInterfaceInfo->Config.DataINPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_IN;
+			Type            = EP_TYPE_BULK;
+			DoubleBanked    = PRNTInterfaceInfo->Config.DataINPipeDoubleBank;
 
 			PRNTInterfaceInfo->State.DataINPipeSize = DataINEndpoint->EndpointSize;
 		}
 		else if (PipeNum == PRNTInterfaceInfo->Config.DataOUTPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_OUT,
+			Size            = DataOUTEndpoint->EndpointSize;
-			                   DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize,
+			EndpointAddress = DataOUTEndpoint->EndpointAddress;
-			                   PRNTInterfaceInfo->Config.DataOUTPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_OUT;
+			Type            = EP_TYPE_BULK;
+			DoubleBanked    = PRNTInterfaceInfo->Config.DataOUTPipeDoubleBank;
 
 			PRNTInterfaceInfo->State.DataOUTPipeSize = DataOUTEndpoint->EndpointSize;
 		}
+		else
+		{
+			continue;
+		}
+
+		if (!(Pipe_ConfigurePipe(PipeNum, Type, Token, EndpointAddress, Size,
+		                         DoubleBanked ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE)))
+		{
+			return PRNT_ENUMERROR_PipeConfigurationFailed;
+		}
 	}
 
 	PRNTInterfaceInfo->State.InterfaceNumber  = PrinterInterface->InterfaceNumber;

LUFA/Drivers/USB/Class/Host/Printer.h

@@ -114,6 +114,7 @@
 				PRNT_ENUMERROR_NoError                    = 0, /**< Configuration Descriptor was processed successfully. */
 				PRNT_ENUMERROR_InvalidConfigDescriptor    = 1, /**< The device returned an invalid Configuration Descriptor. */
 				PRNT_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible Printer interface was not found in the device's Configuration Descriptor. */
+				PRNT_ENUMERROR_PipeConfigurationFailed    = 3, /**< One or more pipes for the specified interface could not be configured correctly. */
 			};
 
 		/* Function Prototypes: */

LUFA/Drivers/USB/Class/Host/RNDIS.c

@@ -102,31 +102,59 @@ uint8_t RNDIS_Host_ConfigurePipes(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfa
 
 	for (uint8_t PipeNum = 1; PipeNum < PIPE_TOTAL_PIPES; PipeNum++)
 	{
+		uint16_t Size;
+		uint8_t  Type;
+		uint8_t  Token;
+		uint8_t  EndpointAddress;
+		uint8_t  InterruptPeriod;
+		bool     DoubleBanked;
+
 		if (PipeNum == RNDISInterfaceInfo->Config.DataINPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_IN,
+			Size            = DataINEndpoint->EndpointSize;
-			                   DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize,
+			EndpointAddress = DataINEndpoint->EndpointAddress;
-			                   RNDISInterfaceInfo->Config.DataINPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_IN;
+			Type            = EP_TYPE_BULK;
+			DoubleBanked    = RNDISInterfaceInfo->Config.DataINPipeDoubleBank;
+			InterruptPeriod = 0;
 
 			RNDISInterfaceInfo->State.DataINPipeSize = DataINEndpoint->EndpointSize;
 		}
 		else if (PipeNum == RNDISInterfaceInfo->Config.DataOUTPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_OUT,
+			Size            = DataOUTEndpoint->EndpointSize;
-			                   DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize,
+			EndpointAddress = DataOUTEndpoint->EndpointAddress;
-			                   RNDISInterfaceInfo->Config.DataOUTPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_OUT;
+			Type            = EP_TYPE_BULK;
+			DoubleBanked    = RNDISInterfaceInfo->Config.DataOUTPipeDoubleBank;
+			InterruptPeriod = 0;
 
 			RNDISInterfaceInfo->State.DataOUTPipeSize = DataOUTEndpoint->EndpointSize;
 		}
 		else if (PipeNum == RNDISInterfaceInfo->Config.NotificationPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
+			Size            = NotificationEndpoint->EndpointSize;
-			                   NotificationEndpoint->EndpointAddress, NotificationEndpoint->EndpointSize,
+			EndpointAddress = NotificationEndpoint->EndpointAddress;
-			                   RNDISInterfaceInfo->Config.NotificationPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_IN;
-			Pipe_SetInterruptPeriod(NotificationEndpoint->PollingIntervalMS);
+			Type            = EP_TYPE_INTERRUPT;
+			DoubleBanked    = RNDISInterfaceInfo->Config.NotificationPipeDoubleBank;
+			InterruptPeriod = NotificationEndpoint->PollingIntervalMS;
 
 			RNDISInterfaceInfo->State.NotificationPipeSize = NotificationEndpoint->EndpointSize;
 		}
+		else
+		{
+			continue;
+		}
+		
+		if (!(Pipe_ConfigurePipe(PipeNum, Type, Token, EndpointAddress, Size,
+		                         DoubleBanked ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE)))
+		{
+			return CDC_ENUMERROR_PipeConfigurationFailed;
+		}
+		
+		if (InterruptPeriod)
+		  Pipe_SetInterruptPeriod(InterruptPeriod);
 	}
 
 	RNDISInterfaceInfo->State.ControlInterfaceNumber = RNDISControlInterface->InterfaceNumber;

LUFA/Drivers/USB/Class/Host/RNDIS.h

@@ -128,6 +128,7 @@
 				RNDIS_ENUMERROR_NoError                    = 0, /**< Configuration Descriptor was processed successfully. */
 				RNDIS_ENUMERROR_InvalidConfigDescriptor    = 1, /**< The device returned an invalid Configuration Descriptor. */
 				RNDIS_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible RNDIS interface was not found in the device's Configuration Descriptor. */
+				RNDIS_ENUMERROR_PipeConfigurationFailed    = 3, /**< One or more pipes for the specified interface could not be configured correctly. */
 			};
 
 		/* Macros: */

LUFA/Drivers/USB/Class/Host/StillImage.c

@@ -88,31 +88,59 @@ uint8_t SI_Host_ConfigurePipes(USB_ClassInfo_SI_Host_t* const SIInterfaceInfo,
 
 	for (uint8_t PipeNum = 1; PipeNum < PIPE_TOTAL_PIPES; PipeNum++)
 	{
+		uint16_t Size;
+		uint8_t  Type;
+		uint8_t  Token;
+		uint8_t  EndpointAddress;
+		uint8_t  InterruptPeriod;
+		bool     DoubleBanked;
+
 		if (PipeNum == SIInterfaceInfo->Config.DataINPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_IN,
+			Size            = DataINEndpoint->EndpointSize;
-			                   DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize,
+			EndpointAddress = DataINEndpoint->EndpointAddress;
-			                   SIInterfaceInfo->Config.DataINPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_IN;
+			Type            = EP_TYPE_BULK;
+			DoubleBanked    = SIInterfaceInfo->Config.DataINPipeDoubleBank;
+			InterruptPeriod = 0;
 
 			SIInterfaceInfo->State.DataINPipeSize = DataINEndpoint->EndpointSize;
 		}
 		else if (PipeNum == SIInterfaceInfo->Config.DataOUTPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_BULK, PIPE_TOKEN_OUT,
+			Size            = DataOUTEndpoint->EndpointSize;
-			                   DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize,
+			EndpointAddress = DataOUTEndpoint->EndpointAddress;
-			                   SIInterfaceInfo->Config.DataOUTPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_OUT;
+			Type            = EP_TYPE_BULK;
+			DoubleBanked    = SIInterfaceInfo->Config.DataOUTPipeDoubleBank;
+			InterruptPeriod = 0;
 
 			SIInterfaceInfo->State.DataOUTPipeSize = DataOUTEndpoint->EndpointSize;
 		}
 		else if (PipeNum == SIInterfaceInfo->Config.EventsPipeNumber)
 		{
-			Pipe_ConfigurePipe(PipeNum, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
+			Size            = EventsEndpoint->EndpointSize;
-			                   EventsEndpoint->EndpointAddress, EventsEndpoint->EndpointSize,
+			EndpointAddress = EventsEndpoint->EndpointAddress;
-			                   SIInterfaceInfo->Config.EventsPipeDoubleBank ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE);
+			Token           = PIPE_TOKEN_IN;
-			Pipe_SetInterruptPeriod(EventsEndpoint->PollingIntervalMS);
+			Type            = EP_TYPE_INTERRUPT;
+			DoubleBanked    = SIInterfaceInfo->Config.EventsPipeDoubleBank;
+			InterruptPeriod = EventsEndpoint->PollingIntervalMS;
 
 			SIInterfaceInfo->State.EventsPipeSize = EventsEndpoint->EndpointSize;
 		}
+		else
+		{
+			continue;
+		}
+		
+		if (!(Pipe_ConfigurePipe(PipeNum, Type, Token, EndpointAddress, Size,
+		                         DoubleBanked ? PIPE_BANK_DOUBLE : PIPE_BANK_SINGLE)))
+		{
+			return SI_ENUMERROR_PipeConfigurationFailed;
+		}
+		
+		if (InterruptPeriod)
+		  Pipe_SetInterruptPeriod(InterruptPeriod);
 	}
 
 	SIInterfaceInfo->State.InterfaceNumber = StillImageInterface->InterfaceNumber;

LUFA/Drivers/USB/Class/Host/StillImage.h

@@ -127,6 +127,7 @@
 				SI_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible Still Image interface was not found in the device's
 				                                              *   Configuration Descriptor.
 				                                              */
+				SI_ENUMERROR_PipeConfigurationFailed    = 3, /**< One or more pipes for the specified interface could not be configured correctly. */
 			};
 
 		/* Function Prototypes: */

LUFA/ManPages/ChangeLog.txt

@@ -16,7 +16,8 @@
   *
   *  <b>Changed:</b>
   *  - Core:
-  *   - None
+  *   - Refactored Host mode Class Driver *_Host_ConfigurePipes() routines to be more space efficient when compiled
+  *   - Added new *_ENUMERROR_PipeConfigurationFailed error codes for the *_Host_ConfigurePipes() routines
   *  - Library Applications:
   *   - Changed the XPLAINBridge software UART to use the regular CTC mode instead of the alternative CTC mode
   *     via the Input Capture register, to reduce user confusion