diff options
author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2022-11-29 16:12:18 +0200 |
---|---|---|
committer | Paolo Abeni <pabeni@redhat.com> | 2022-12-01 13:40:22 +0100 |
commit | 55f90a4d07ec32279c622a25be4e2555ee9d7dff (patch) | |
tree | e3bbd8fa0f51865baed32523ac89feac715988bd /drivers/net | |
parent | bc230671bfb25c2d3c225f674fe6c03cea88d22e (diff) | |
download | linux-55f90a4d07ec32279c622a25be4e2555ee9d7dff.tar.bz2 |
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 <vladimir.oltean@nxp.com>
Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Tested-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'drivers/net')
-rw-r--r-- | drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c index 4dbf8a1651cd..b77d292cd960 100644 --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c @@ -4899,6 +4899,10 @@ static int dpaa2_eth_probe(struct fsl_mc_device *dpni_dev) } #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"); @@ -4911,10 +4915,6 @@ static int dpaa2_eth_probe(struct fsl_mc_device *dpni_dev) 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; @@ -4948,13 +4948,13 @@ 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: @@ -5002,9 +5002,6 @@ static int dpaa2_eth_remove(struct fsl_mc_device *ls_dev) #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); @@ -5015,6 +5012,9 @@ static int dpaa2_eth_remove(struct fsl_mc_device *ls_dev) 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); |