Messages in this thread Patch in this message | | | From | Wong Vee Khee <> | Subject | [PATCH net-next] net: stmmac: introduce rtnl_lock|unlock() on configuring real_num_rx|tx_queues | Date | Thu, 17 Sep 2020 13:02:15 +0800 |
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From: "Tan, Tee Min" <tee.min.tan@intel.com>
For driver open(), rtnl_lock is acquired by network stack but not in the resume(). Therefore, we introduce lock_acquired boolean to control when to use rtnl_lock|unlock() within stmmac_hw_setup().
Fixes: 686cff3d7022 ("net: stmmac: Fix incorrect location to set real_num_rx|tx_queues")
Signed-off-by: Tan, Tee Min <tee.min.tan@intel.com> --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index df2c74bbfcff..22e6a3defa78 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -2607,7 +2607,8 @@ static void stmmac_safety_feat_configuration(struct stmmac_priv *priv) * 0 on success and an appropriate (-)ve integer as defined in errno.h * file on failure. */ -static int stmmac_hw_setup(struct net_device *dev, bool init_ptp) +static int stmmac_hw_setup(struct net_device *dev, bool init_ptp, + bool lock_acquired) { struct stmmac_priv *priv = netdev_priv(dev); u32 rx_cnt = priv->plat->rx_queues_to_use; @@ -2715,9 +2716,15 @@ static int stmmac_hw_setup(struct net_device *dev, bool init_ptp) } /* Configure real RX and TX queues */ + if (!lock_acquired) + rtnl_lock(); + netif_set_real_num_rx_queues(dev, priv->plat->rx_queues_to_use); netif_set_real_num_tx_queues(dev, priv->plat->tx_queues_to_use); + if (!lock_acquired) + rtnl_unlock(); + /* Start the ball rolling... */ stmmac_start_all_dma(priv); @@ -2804,7 +2811,7 @@ static int stmmac_open(struct net_device *dev) goto init_error; } - ret = stmmac_hw_setup(dev, true); + ret = stmmac_hw_setup(dev, true, true); if (ret < 0) { netdev_err(priv->dev, "%s: Hw setup failed\n", __func__); goto init_error; @@ -5238,7 +5245,7 @@ int stmmac_resume(struct device *dev) stmmac_clear_descriptors(priv); - stmmac_hw_setup(ndev, false); + stmmac_hw_setup(ndev, false, false); stmmac_init_coalesce(priv); stmmac_set_rx_mode(ndev); -- 2.17.0
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