Hi, everybody, I post this in hope that somebody could shed some light on how should the DMA work in conjunction with the MACE ethernet controller. I find difficult to understand why it does not work in my case:
What happens? First two bytes of a received frame are not what they should be in more than 50% of frames. This can be avoided by receiving the frame on a word boundary, but with the usual skb_reserve(..., 2) (to make the IP header land on word boundary), it won't work. So, I can make the driver work by receiving at 0 offset, and then moving the data 2 bytes up, before handing it over to upper layers. This used to work with a 2.4.27 kernel, obviously the Grand Central DBDMA controller can receive on non-word boundaries. Now I have 2.6.15.7. Any ideas, what could cause this kind of behaviour (and regression)? Best regards, Risto Suominen _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
