From: Lothar Waßmann Date: Fri, 7 Nov 2014 09:02:47 +0000 (+0100) Subject: net: fec: fix regression on i.MX28 introduced by rx_copybreak support X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~119^2~22 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1310b544e5708ab5e4de46e9c70f54b9fd8350b2;p=pandora-kernel.git net: fec: fix regression on i.MX28 introduced by rx_copybreak support commit 1b7bde6d659d ("net: fec: implement rx_copybreak to improve rx performance") introduced a regression for i.MX28. The swap_buffer() function doing the endian conversion of the received data on i.MX28 may access memory beyond the actual packet size in the DMA buffer. fec_enet_copybreak() does not copy those bytes, so that the last bytes of a packet may be filled with invalid data after swapping. This will likely lead to checksum errors on received packets. E.g. when trying to mount an NFS rootfs: UDP: bad checksum. From 192.168.1.225:111 to 192.168.100.73:44662 ulen 36 Do the byte swapping and copying to the new skb in one go if necessary. Signed-off-by: Lothar Waßmann Tested-by: Fabio Estevam Signed-off-by: David S. Miller --- Reading git-diff-tree failed