Am Dienstag, 18. Februar 2020, 23:10:37 CET schrieb Carlos de Paula: > Some rockchip SoCs like the RK3399 and RK3328 exhibit an issue > where tx checksumming does not work with packets larger than 1498. > > The default Programmable Buffer Length for TX in these GMAC's is > not suitable for MTUs higher than 1498. The workaround is to disable > TX offloading with 'ethtool -K eth0 tx off rx off' causing performance > impacts as it disables hardware checksumming. > > This patch sets snps,txpbl to 0x4 which is a safe number tested ok for > the most popular MTU value of 1500. > > For reference, see https://lkml.org/lkml/2019/4/1/1382. > > Signed-off-by: Carlos de Paula <me@xxxxxxxxxxxxx> applied for 5.7 Thanks Heiko
