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net: ipa: reorder netdev pointer assignments

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Assign the ipa->modem_netdev and endpoint->netdev pointers *before*
registering the network device.  As soon as the device is
registered it can be opened, and by that time we'll want those
pointers valid.

Similarly, don't make those pointers NULL until *after* the modem
network device is unregistered in ipa_modem_stop().

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alex Elder 2021-08-04 10:36:22 -05:00 committed by David S. Miller
parent 30c2515b89
commit 10cc73c4b7
1 changed files with 9 additions and 7 deletions
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16
drivers/net/ipa/ipa_modem.c
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@ -231,13 +231,15 @@ int ipa_modem_start(struct ipa *ipa)
SET_NETDEV_DEV(netdev, &ipa->pdev->dev);
priv = netdev_priv(netdev);
priv->ipa = ipa;
ipa->name_map[IPA_ENDPOINT_AP_MODEM_TX]->netdev = netdev;
ipa->name_map[IPA_ENDPOINT_AP_MODEM_RX]->netdev = netdev;
ipa->modem_netdev = netdev;
ret = register_netdev(netdev);
if (!ret) {
ipa->modem_netdev = netdev;
ipa->name_map[IPA_ENDPOINT_AP_MODEM_TX]->netdev = netdev;
ipa->name_map[IPA_ENDPOINT_AP_MODEM_RX]->netdev = netdev;
} else {
if (ret) {
ipa->modem_netdev = NULL;
ipa->name_map[IPA_ENDPOINT_AP_MODEM_RX]->netdev = NULL;
ipa->name_map[IPA_ENDPOINT_AP_MODEM_TX]->netdev = NULL;
free_netdev(netdev);
}
@ -276,10 +278,10 @@ int ipa_modem_stop(struct ipa *ipa)
/* If it was opened, stop it first */
if (netdev->flags & IFF_UP)
(void)ipa_stop(netdev);
unregister_netdev(netdev);
ipa->modem_netdev = NULL;
ipa->name_map[IPA_ENDPOINT_AP_MODEM_RX]->netdev = NULL;
ipa->name_map[IPA_ENDPOINT_AP_MODEM_TX]->netdev = NULL;
ipa->modem_netdev = NULL;
unregister_netdev(netdev);
free_netdev(netdev);
}