Commit 7dde596e authored by Ben Hutchings's avatar Ben Hutchings Committed by David S. Miller

sfc: Fix synchronisation of efx_mtd_{probe,rename,remove}

Currently efx_mtd_rename() can race with the probe() and remove()
functions.

Move probe() before device registration and remove() after
unregistration.  Move initialisation/update of all names based on the
netdev name into a new function and call it under the RTNL immediately
after registration.
Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0c53d8c8
......@@ -1517,18 +1517,21 @@ static const struct net_device_ops efx_netdev_ops = {
#endif
};
static void efx_update_name(struct efx_nic *efx)
{
strcpy(efx->name, efx->net_dev->name);
efx_mtd_rename(efx);
efx_set_channel_names(efx);
}
static int efx_netdev_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct net_device *net_dev = ptr;
if (net_dev->netdev_ops == &efx_netdev_ops && event == NETDEV_CHANGENAME) {
struct efx_nic *efx = netdev_priv(net_dev);
strcpy(efx->name, net_dev->name);
efx_mtd_rename(efx);
efx_set_channel_names(efx);
}
if (net_dev->netdev_ops == &efx_netdev_ops &&
event == NETDEV_CHANGENAME)
efx_update_name(netdev_priv(net_dev));
return NOTIFY_DONE;
}
......@@ -1568,8 +1571,10 @@ static int efx_register_netdev(struct efx_nic *efx)
EFX_ERR(efx, "could not register net dev\n");
return rc;
}
strcpy(efx->name, net_dev->name);
efx_set_channel_names(efx);
rtnl_lock();
efx_update_name(efx);
rtnl_unlock();
rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
if (rc) {
......@@ -1978,8 +1983,6 @@ static void efx_pci_remove(struct pci_dev *pci_dev)
if (!efx)
return;
efx_mtd_remove(efx);
/* Mark the NIC as fini, then stop the interface */
rtnl_lock();
efx->state = STATE_FINI;
......@@ -1993,6 +1996,8 @@ static void efx_pci_remove(struct pci_dev *pci_dev)
efx_unregister_netdev(efx);
efx_mtd_remove(efx);
/* Wait for any scheduled resets to complete. No more will be
* scheduled from this point because efx_stop_all() has been
* called, we are no longer registered with driverlink, and
......@@ -2146,17 +2151,15 @@ static int __devinit efx_pci_probe(struct pci_dev *pci_dev,
/* Switch to the running state before we expose the device to
* the OS. This is to ensure that the initial gathering of
* MAC stats succeeds. */
rtnl_lock();
efx->state = STATE_RUNNING;
rtnl_unlock();
efx_mtd_probe(efx); /* allowed to fail */
rc = efx_register_netdev(efx);
if (rc)
goto fail5;
EFX_LOG(efx, "initialisation successful\n");
efx_mtd_probe(efx); /* allowed to fail */
return 0;
fail5:
......
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