| Message ID | 20200917050215.8725-1-vee.khee.wong@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [net-next] net: stmmac: introduce rtnl_lock|unlock() on configuring real_num_rx|tx_queues | expand |
On Thu, Sep 17, 2020 at 01:02:15PM +0800, Wong Vee Khee wrote: > 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(). Doesn't really make sense, if function needs to have lock acquired, the caller is supposed to take it and function should have proper lockdep annotation inside and not this conditional lock/unlock. Thanks > > Fixes: 686cff3d7022 ("net: stmmac: Fix incorrect location to set real_num_rx|tx_queues") > Extra line. > 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 >
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);