On Mon, Apr 15, 2019 at 09:49:47AM +0200, Lars Persson wrote:
> This was fixed in upstream by commit 7d9e6c5afab6 ("net: stmmac: Integrate
> XGMAC into main driver flow") that is a new feature commit.
>
> We found a race condition in the DMA init sequence that hits if the
> PHY already has link up during stmmac_hw_setup. Since the ring length
> was programmed after enabling the RX path, we might receive a packet
> before the correct ring length is programmed. When that happened we
> could not get reliable interrupts for DMA RX and the MTL complained
> about RX FIFO overrun.
>
> Signed-off-by: Lars Persson <larper@xxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx # 4.14.x
> Cc: Giuseppe Cavallaro <peppe.cavallaro@xxxxxx>
> Cc: Alexandre Torgue <alexandre.torgue@xxxxxx>
> Cc: Jose Abreu <joabreu@xxxxxxxxxxxx>
> ---
> drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
This, and the 4.9 patch now queued up, thanks.
greg k-h
