ravenna-alsa-lkm-disable-ptp-checksum.patch

diff --git a/driver/PTP.c b/driver/PTP.c
--- a/driver/PTP.c
+++ b/driver/PTP.c
@@ -306,6 +306,7 @@ EDispatchResult process_PTP_packet(TClock_PTP* self, TUDPPacketBase* pUDPPacketB
 	}
 
 	// verify checksum
+#if 0
 	if (pUDPPacketBase->UDPHeader.usCheckSum != 0)
 	{
 		uint16_t ui16CheckSum = MTAL_ComputeUDPChecksum(&pPTPPacketBase->UDPHeader, MTAL_SWAP16(pUDPPacketBase->UDPHeader.usLen), (unsigned short*)&pPTPPacketBase->IPV4Header.ui32SrcIP, (unsigned short*)&pPTPPacketBase->IPV4Header.ui32DestIP);
@@ -319,6 +320,7 @@ EDispatchResult process_PTP_packet(TClock_PTP* self, TUDPPacketBase* pUDPPacketB
 			return DR_PACKET_ERROR;
 		}
 	}
+#endif
 
 	//DumpPTPV2MsgHeader(&pPTPPacketBase->V2MsgHeader);