On 11/29/2016 07:35 PM, Nikita Yushchenko wrote: > Fec driver uses Rx buffers of 2k, but programs hardware to limit > incoming frames to 1522 bytes. This raises issues when FEC device > is used with DSA (since DSA tag can make frame larger), and also > disallows manual sending and receiving larger frames. > > This patch removes the limitation, allowing Rx size up to entire buffer. > At the same time possible Tx size is increased as well, because hardware > uses the same register field to limit Rx and Tx. > > Signed-off-by: Nikita Yushchenko <nikita.yo...@cogentembedded.com> > ---
I recently did similar changes to the freescale/gianfar to prevent fragmentation of (E)DSA frames [1]. With the fragmentation kicking in, I noticed a bug in the scatter-gather logic which caused the frame-size of fragmented frames to be reported wrong [2]. Not sure if the fec driver has SG capabilities and if this issue also applies, you might want to double-check. Cheers, Zefir [1] http://marc.info/?l=linux-netdev&m=147187438313519&w=2 [2] http://marc.info/?l=linux-netdev&m=147187430213484&w=2
