net: stmmac: perserve TX and RX coalesce value during XDP setup

commit 61da6ac715700bcfeef50d187e15c6cc7c9d079b upstream.

When XDP program is loaded, it is desirable that the previous TX and RX
coalesce values are not re-inited to its default value. This prevents
unnecessary re-configurig the coalesce values that were working fine
before.

Fixes: ac746c8520d9 ("net: stmmac: enhance XDP ZC driver level switching performance")
Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com>
Tested-by: Kurt Kanzenbach <kurt@linutronix.de>
Link: https://lore.kernel.org/r/20211124114019.3949125-1-boon.leong.ong@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 8610e4d28e85ca3073f5f087d682f4d73f89c8df..e2468c3a9a437ff8b768f83e8cf36db043f01847 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -6596,6 +6596,9 @@ int stmmac_xdp_open(struct net_device *dev)
                tx_q->tx_tail_addr = tx_q->dma_tx_phy;
                stmmac_set_tx_tail_ptr(priv, priv->ioaddr,
                                       tx_q->tx_tail_addr, chan);
+
+               hrtimer_init(&tx_q->txtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+               tx_q->txtimer.function = stmmac_tx_timer;
        }
 
        /* Enable the MAC Rx/Tx */
@@ -6604,8 +6607,6 @@ int stmmac_xdp_open(struct net_device *dev)
        /* Start Rx & Tx DMA Channels */
        stmmac_start_all_dma(priv);
 
-       stmmac_init_coalesce(priv);
-
        ret = stmmac_request_irq(dev);
        if (ret)
                goto irq_error;