From: Niklas Cassel <niklas.cas...@axis.com> Date: Tue, 6 Jun 2017 09:25:00 +0200
> stmmac_tso_allocator can fail to set the Last Descriptor bit > on a descriptor that actually was the last descriptor. > > This happens when the buffer of the last descriptor ends > up having a size of exactly TSO_MAX_BUFF_SIZE. > > When the IP eventually reaches the next last descriptor, > which actually has the bit set, the DMA will hang. > > When the DMA hangs, we get a tx timeout, however, > since stmmac does not do a complete reset of the IP > in stmmac_tx_timeout, we end up in a state with > completely hung TX. > > Signed-off-by: Niklas Cassel <niklas.cas...@axis.com> Applied and queued up for -stable, thank you.
