6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Esben Haabendal esben@geanix.com
commit 4896bb7c0b31a0a3379b290ea7729900c59e0c69 upstream.
With the dma conf being reallocated on each call to stmmac_open(), any information in there is lost, unless we specifically handle it.
The STMMAC_TBS_EN bit is set when adding an etf qdisc, and the etf qdisc therefore would stop working when link was set down and then back up.
Fixes: ba39b344e924 ("net: ethernet: stmicro: stmmac: generate stmmac dma conf before open") Cc: stable@vger.kernel.org Signed-off-by: Esben Haabendal esben@geanix.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -3853,6 +3853,9 @@ static int __stmmac_open(struct net_devi priv->rx_copybreak = STMMAC_RX_COPYBREAK;
buf_sz = dma_conf->dma_buf_sz; + for (int i = 0; i < MTL_MAX_TX_QUEUES; i++) + if (priv->dma_conf.tx_queue[i].tbs & STMMAC_TBS_EN) + dma_conf->tx_queue[i].tbs = priv->dma_conf.tx_queue[i].tbs; memcpy(&priv->dma_conf, dma_conf, sizeof(*dma_conf));
stmmac_reset_queues_param(priv);