On 04/27/2015 09:47 PM, David Miller wrote: > From: Jaeden Amero <jaeden.am...@ni.com> > Date: Mon, 27 Apr 2015 17:43:30 -0500 > > A UDP checksum of zero, means "checksum not computed". And your > device isn't computing the checksum at all, but rather is leaving it > at zero.
The "zero" checksum is not what gets sent over the wire. Independent of the value of the checksum field, hardware generates a correct checksum for payloads of 3 or more bytes. The bug is that hardware generates an incorrect checksum for payloads of 2 or less bytes, unless the checksum field is zeroed. > You need to handle this properly by computing the checksum in > software and then setting the TX descriptor bits such that the > chip leaves the checksum field alone. Unfortunately, the Cadence MACB doesn't support the enabling or disabling of checksum generation per descriptor. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
