From: Tom Lendacky <thomas.lenda...@amd.com> Date: Wed, 15 Mar 2017 15:11:23 -0500
> Newer hardware does not provide a cumulative payload length when multiple > descriptors are needed to handle the data. Once the MTU increases beyond > the size that can be handled by a single descriptor, the SKB does not get > built properly by the driver. > > The driver will now calculate the size of the data buffers used by the > hardware. The first buffer of the first descriptor is for packet headers > or packet headers and data when the headers can't be split. Subsequent > descriptors in a multi-descriptor chain will not use the first buffer. The > second buffer is used by all the descriptors in the chain for payload data. > Based on whether the driver is processing the first, intermediate, or last > descriptor it can calculate the buffer usage and build the SKB properly. > > Tested and verified on both old and new hardware. > > Signed-off-by: Tom Lendacky <thomas.lenda...@amd.com> Applied, thanks Tom.
