On 3/27/2019 8:35 PM, Aaro Koskinen wrote: > From: Aaro Koskinen <aaro.koski...@nokia.com> > > We always program the maximum DMA buffer size into the receive descriptor, > although the allocated size may be less. E.g. with the default MTU size > we allocate only 1536 bytes. If somebody sends us a bigger frame, then > memory may get corrupted. > > Fix by using exact buffer sizes. > > Signed-off-by: Aaro Koskinen <aaro.koski...@nokia.com>
So, I'm seeing that the maximum allowed buffer size that can be put in the descriptor changes between enhanced descriptors to normal descriptors (8KB vs. 2KB right ?). Shouldn't stmmac_main know about this limit before trying to init descriptors ? We do limit the MTU according to HW version but I would rather prefer not having to need to calculate min() values in the descriptor code and just use the value as is ... Thanks, Jose Miguel Abreu
