ionic: keep ionic dev on lif init fail

If the basic ionic interface works but the lif creation fails,
don't fail the probe.  This will allow us to use the driver to
help inspect the hw/fw/pci interface for debugging purposes.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c

@@ -37,6 +37,9 @@ int ionic_bus_alloc_irq_vectors(struct ionic *ionic, unsigned int nintrs)
 
 void ionic_bus_free_irq_vectors(struct ionic *ionic)
 {
+	if (!ionic->nintrs)
+		return;
+
 	pci_free_irq_vectors(ionic->pdev);
 }
 
@@ -346,6 +349,11 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	ionic_reset(ionic);
 err_out_teardown:
 	ionic_dev_teardown(ionic);
+	/* Don't fail the probe for these errors, keep
+	 * the hw interface around for inspection
+	 */
+	return 0;
+
 err_out_unmap_bars:
 	ionic_unmap_bars(ionic);
 	pci_release_regions(pdev);
@@ -369,11 +377,14 @@ static void ionic_remove(struct pci_dev *pdev)
 	if (!ionic)
 		return;
 
+	if (ionic->master_lif) {
 		ionic_devlink_unregister(ionic);
 		ionic_lifs_unregister(ionic);
 		ionic_lifs_deinit(ionic);
 		ionic_lifs_free(ionic);
 		ionic_bus_free_irq_vectors(ionic);
+	}
+
 	ionic_port_reset(ionic);
 	ionic_reset(ionic);
 	ionic_dev_teardown(ionic);

drivers/net/ethernet/pensando/ionic/ionic_lif.c

@@ -2408,6 +2408,9 @@ void ionic_lifs_unregister(struct ionic *ionic)
 	 * current model, so don't bother searching the
 	 * ionic->lif for candidates to unregister
 	 */
+	if (!ionic->master_lif)
+		return;
+
 	cancel_work_sync(&ionic->master_lif->deferred.work);
 	cancel_work_sync(&ionic->master_lif->tx_timeout_work);
 	if (ionic->master_lif->netdev->reg_state == NETREG_REGISTERED)