Merge branch 'ionic-error-recovery-fixes'

Shannon Nelson says:

====================
ionic error recovery fixes

These are a few little patches to make error recovery a little
more safe and successful.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 50 insertions, 22 deletions

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c b/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c
index bc03cecf80cc..5f8fc58d42b3 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c
@@ -228,7 +228,13 @@ DEFINE_SHOW_ATTRIBUTE(netdev);
 
 void ionic_debugfs_add_lif(struct ionic_lif *lif)
 {
-	lif->dentry = debugfs_create_dir(lif->name, lif->ionic->dentry);
+	struct dentry *lif_dentry;
+
+	lif_dentry = debugfs_create_dir(lif->name, lif->ionic->dentry);
+	if (IS_ERR_OR_NULL(lif_dentry))
+		return;
+	lif->dentry = lif_dentry;
+
 	debugfs_create_file("netdev", 0400, lif->dentry,
 			    lif->netdev, &netdev_fops);
 }
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 12e3823b0bc1..8b442eb010a2 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -275,8 +275,10 @@ static void ionic_lif_qcq_deinit(struct ionic_lif *lif, struct ionic_qcq *qcq)
 	if (qcq->flags & IONIC_QCQ_F_INTR) {
 		ionic_intr_mask(idev->intr_ctrl, qcq->intr.index,
 				IONIC_INTR_MASK_SET);
+		irq_set_affinity_hint(qcq->intr.vector, NULL);
 		devm_free_irq(dev, qcq->intr.vector, &qcq->napi);
 		netif_napi_del(&qcq->napi);
+		qcq->intr.vector = 0;
 	}
 
 	qcq->flags &= ~IONIC_QCQ_F_INITED;
@@ -318,19 +320,21 @@ static void ionic_qcqs_free(struct ionic_lif *lif)
 		lif->adminqcq = NULL;
 	}
 
-	for (i = 0; i < lif->nxqs; i++)
-		if (lif->rxqcqs[i].stats)
-			devm_kfree(dev, lif->rxqcqs[i].stats);
-
-	devm_kfree(dev, lif->rxqcqs);
-	lif->rxqcqs = NULL;
-
-	for (i = 0; i < lif->nxqs; i++)
-		if (lif->txqcqs[i].stats)
-			devm_kfree(dev, lif->txqcqs[i].stats);
+	if (lif->rxqcqs) {
+		for (i = 0; i < lif->nxqs; i++)
+			if (lif->rxqcqs[i].stats)
+				devm_kfree(dev, lif->rxqcqs[i].stats);
+		devm_kfree(dev, lif->rxqcqs);
+		lif->rxqcqs = NULL;
+	}
 
-	devm_kfree(dev, lif->txqcqs);
-	lif->txqcqs = NULL;
+	if (lif->txqcqs) {
+		for (i = 0; i < lif->nxqs; i++)
+			if (lif->txqcqs[i].stats)
+				devm_kfree(dev, lif->txqcqs[i].stats);
+		devm_kfree(dev, lif->txqcqs);
+		lif->txqcqs = NULL;
+	}
 }
 
 static void ionic_link_qcq_interrupts(struct ionic_qcq *src_qcq,
@@ -832,7 +836,7 @@ static int ionic_lif_addr_add(struct ionic_lif *lif, const u8 *addr)
 
 	memcpy(ctx.cmd.rx_filter_add.mac.addr, addr, ETH_ALEN);
 	err = ionic_adminq_post_wait(lif, &ctx);
-	if (err)
+	if (err && err != -EEXIST)
 		return err;
 
 	return ionic_rx_filter_save(lif, 0, IONIC_RXQ_INDEX_ANY, 0, &ctx);
@@ -862,7 +866,7 @@ static int ionic_lif_addr_del(struct ionic_lif *lif, const u8 *addr)
 	spin_unlock_bh(&lif->rx_filters.lock);
 
 	err = ionic_adminq_post_wait(lif, &ctx);
-	if (err)
+	if (err && err != -EEXIST)
 		return err;
 
 	netdev_dbg(lif->netdev, "rx_filter del ADDR %pM (id %d)\n", addr,
@@ -1425,10 +1429,15 @@ static void ionic_lif_rss_deinit(struct ionic_lif *lif)
 static void ionic_txrx_disable(struct ionic_lif *lif)
 {
 	unsigned int i;
+	int err;
 
 	for (i = 0; i < lif->nxqs; i++) {
-		ionic_qcq_disable(lif->txqcqs[i].qcq);
-		ionic_qcq_disable(lif->rxqcqs[i].qcq);
+		err = ionic_qcq_disable(lif->txqcqs[i].qcq);
+		if (err == -ETIMEDOUT)
+			break;
+		err = ionic_qcq_disable(lif->rxqcqs[i].qcq);
+		if (err == -ETIMEDOUT)
+			break;
 	}
 }
 
@@ -1552,7 +1561,8 @@ static int ionic_txrx_enable(struct ionic_lif *lif)
 		ionic_rx_fill(&lif->rxqcqs[i].qcq->q);
 		err = ionic_qcq_enable(lif->rxqcqs[i].qcq);
 		if (err) {
-			ionic_qcq_disable(lif->txqcqs[i].qcq);
+			if (err != -ETIMEDOUT)
+				ionic_qcq_disable(lif->txqcqs[i].qcq);
 			goto err_out;
 		}
 	}
@@ -1561,8 +1571,12 @@ static int ionic_txrx_enable(struct ionic_lif *lif)
 
 err_out:
 	while (i--) {
-		ionic_qcq_disable(lif->rxqcqs[i].qcq);
-		ionic_qcq_disable(lif->txqcqs[i].qcq);
+		err = ionic_qcq_disable(lif->rxqcqs[i].qcq);
+		if (err == -ETIMEDOUT)
+			break;
+		err = ionic_qcq_disable(lif->txqcqs[i].qcq);
+		if (err == -ETIMEDOUT)
+			break;
 	}
 
 	return err;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_main.c b/drivers/net/ethernet/pensando/ionic/ionic_main.c
index c5e3d7639f7e..c16dbbe54bf7 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_main.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_main.c
@@ -243,11 +243,16 @@ static void ionic_adminq_cb(struct ionic_queue *q,
 
 static int ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
 {
-	struct ionic_queue *adminq = &lif->adminqcq->q;
+	struct ionic_queue *adminq;
 	int err = 0;
 
 	WARN_ON(in_interrupt());
 
+	if (!lif->adminqcq)
+		return -EIO;
+
+	adminq = &lif->adminqcq->q;
+
 	spin_lock(&lif->adminq_lock);
 	if (!ionic_q_has_space(adminq, 1)) {
 		err = -ENOSPC;
@@ -360,7 +365,10 @@ try_again:
 		done, duration / HZ, duration);
 
 	if (!done && hb) {
-		ionic_dev_cmd_clean(ionic);
+		/* It is possible (but unlikely) that FW was busy and missed a
+		 * heartbeat check but is still alive and will process this
+		 * request, so don't clean the dev_cmd in this case.
+		 */
 		dev_warn(ionic->dev, "DEVCMD %s (%d) failed - FW halted\n",
 			 ionic_opcode_to_str(opcode), opcode);
 		return -ENXIO;