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ionic: add lif_quiesce to wait for queue activity to stop 

Even though we've already turned off the queue activity with
the ionic_qcq_disable(), we need to wait for any device queues
that are processing packets to drain down before we try to
flush our packets and tear down the queues.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shannon Nelson 2019-09-30 20:03:26 -07:00 committed by David S. Miller
parent e95f922f4c
commit e982ae6aa4
1 changed files with 16 additions and 0 deletions
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16
drivers/net/ethernet/pensando/ionic/ionic_lif.c
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@ -242,6 +242,21 @@ static int ionic_qcq_disable(struct ionic_qcq *qcq)
return ionic_adminq_post_wait(lif, &ctx);
}
static void ionic_lif_quiesce(struct ionic_lif *lif)
{
struct ionic_admin_ctx ctx = {
.work = COMPLETION_INITIALIZER_ONSTACK(ctx.work),
.cmd.lif_setattr = {
.opcode = IONIC_CMD_LIF_SETATTR,
.attr = IONIC_LIF_ATTR_STATE,
.index = lif->index,
.state = IONIC_LIF_DISABLE
},
};
ionic_adminq_post_wait(lif, &ctx);
}
static void ionic_lif_qcq_deinit(struct ionic_lif *lif, struct ionic_qcq *qcq)
{
struct ionic_dev *idev = &lif->ionic->idev;
@ -1589,6 +1604,7 @@ int ionic_stop(struct net_device *netdev)
netif_tx_disable(netdev);
ionic_txrx_disable(lif);
ionic_lif_quiesce(lif);
ionic_txrx_deinit(lif);
ionic_txrx_free(lif);