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- From e0ea63162cb5f1ca7f844d6ef5fc4079448ee2d5 Mon Sep 17 00:00:00 2001
- From: Vladimir Oltean <[email protected]>
- Date: Tue, 29 Nov 2022 16:12:18 +0200
- Subject: [PATCH 11/14] net: dpaa2-eth: connect to MAC before requesting the
- "endpoint changed" IRQ
- dpaa2_eth_connect_mac() is called both from dpaa2_eth_probe() and from
- dpni_irq0_handler_thread().
- It could happen that the DPNI gets connected to a DPMAC on the fsl-mc
- bus exactly during probe, as soon as the "endpoint change" interrupt is
- requested in dpaa2_eth_setup_irqs(). This will cause the
- dpni_irq0_handler_thread() to register a phylink instance for that DPMAC.
- Then, the probing function will also try to register a phylink instance
- for the same DPMAC, operation which should fail (and this will fail the
- probing of the driver).
- Reorder dpaa2_eth_setup_irqs() and dpaa2_eth_connect_mac(), such that
- dpni_irq0_handler_thread() never races with the DPMAC-related portion of
- the probing path.
- Also reorder dpaa2_eth_disconnect_mac() to be in the mirror position of
- dpaa2_eth_connect_mac() in the teardown path.
- Signed-off-by: Vladimir Oltean <[email protected]>
- Reviewed-by: Ioana Ciornei <[email protected]>
- Tested-by: Ioana Ciornei <[email protected]>
- Signed-off-by: Paolo Abeni <[email protected]>
- ---
- .../net/ethernet/freescale/dpaa2/dpaa2-eth.c | 18 +++++++++---------
- 1 file changed, 9 insertions(+), 9 deletions(-)
- --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
- +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
- @@ -4710,6 +4710,10 @@ static int dpaa2_eth_probe(struct fsl_mc
- }
- #endif
-
- + err = dpaa2_eth_connect_mac(priv);
- + if (err)
- + goto err_connect_mac;
- +
- err = dpaa2_eth_setup_irqs(dpni_dev);
- if (err) {
- netdev_warn(net_dev, "Failed to set link interrupt, fall back to polling\n");
- @@ -4722,10 +4726,6 @@ static int dpaa2_eth_probe(struct fsl_mc
- priv->do_link_poll = true;
- }
-
- - err = dpaa2_eth_connect_mac(priv);
- - if (err)
- - goto err_connect_mac;
- -
- err = dpaa2_eth_dl_alloc(priv);
- if (err)
- goto err_dl_register;
- @@ -4759,13 +4759,13 @@ err_dl_port_add:
- err_dl_trap_register:
- dpaa2_eth_dl_free(priv);
- err_dl_register:
- - dpaa2_eth_disconnect_mac(priv);
- -err_connect_mac:
- if (priv->do_link_poll)
- kthread_stop(priv->poll_thread);
- else
- fsl_mc_free_irqs(dpni_dev);
- err_poll_thread:
- + dpaa2_eth_disconnect_mac(priv);
- +err_connect_mac:
- dpaa2_eth_free_rings(priv);
- err_alloc_rings:
- err_csum:
- @@ -4813,9 +4813,6 @@ static int dpaa2_eth_remove(struct fsl_m
- #endif
-
- unregister_netdev(net_dev);
- - rtnl_lock();
- - dpaa2_eth_disconnect_mac(priv);
- - rtnl_unlock();
-
- dpaa2_eth_dl_port_del(priv);
- dpaa2_eth_dl_traps_unregister(priv);
- @@ -4826,6 +4823,9 @@ static int dpaa2_eth_remove(struct fsl_m
- else
- fsl_mc_free_irqs(ls_dev);
-
- + rtnl_lock();
- + dpaa2_eth_disconnect_mac(priv);
- + rtnl_unlock();
- dpaa2_eth_free_rings(priv);
- free_percpu(priv->fd);
- free_percpu(priv->sgt_cache);
|
