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There appears to be some issue in the LAN78xx where the checksum computed on a VLAN tagged packet is incorrect, or at least not in the form that the kernel is after. This is most easily shown by pinging a device via a VLAN tagged interface and it will dump out the error message and stack trace from netdev_rx_csum_fault. It has also been seen with standard TCP and UDP packets. Until this is fully understood, request that the network stack computes the checksum on packets signalled as having a VLAN tag applied. See https://github.com/raspberrypi/linux/issues/2458 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.