[PATCH] net/fm10k: fix cleanup during init failure

[Julien Meunier <julien.meunier@nokia.com>]

Cleanup was not done on this PMD if a error is seen during the init:
- possible memory leak due to a missing free
- interrupt handler was not disabled: if an IRQ is received after the
  init, a SIGSEGV can be seen (private data stored in
  rte_eth_devices[port_id] is pointing to NULL)

Fixes: a6061d9e7075 ("fm10k: register PF driver")
Fixes: 4c287332c39a ("fm10k: add PF and VF interrupt handling")
Cc: stable@dpdk.org

Signed-off-by: Julien Meunier <julien.meunier@nokia.com>
---
 drivers/net/fm10k/fm10k_ethdev.c | 39 +++++++++++++++++++++++++++-----
 1 file changed, 33 insertions(+), 6 deletions(-)

diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c
index fa0d16277e..7b490bea17 100644
--- a/drivers/net/fm10k/fm10k_ethdev.c
+++ b/drivers/net/fm10k/fm10k_ethdev.c
@@ -3058,7 +3058,7 @@ eth_fm10k_dev_init(struct rte_eth_dev *dev)
 	struct fm10k_hw *hw = FM10K_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	struct rte_pci_device *pdev = RTE_ETH_DEV_TO_PCI(dev);
 	struct rte_intr_handle *intr_handle = pdev->intr_handle;
-	int diag, i;
+	int diag, i, ret;
 	struct fm10k_macvlan_filter_info *macvlan;
 
 	PMD_INIT_FUNC_TRACE();
@@ -3147,21 +3147,24 @@ eth_fm10k_dev_init(struct rte_eth_dev *dev)
 	diag = fm10k_stats_reset(dev);
 	if (diag != 0) {
 		PMD_INIT_LOG(ERR, "Stats reset failed: %d", diag);
-		return diag;
+		ret = diag;
+		goto err_stat;
 	}
 
 	/* Reset the hw */
 	diag = fm10k_reset_hw(hw);
 	if (diag != FM10K_SUCCESS) {
 		PMD_INIT_LOG(ERR, "Hardware reset failed: %d", diag);
-		return -EIO;
+		ret = -EIO;
+		goto err_reset_hw;
 	}
 
 	/* Setup mailbox service */
 	diag = fm10k_setup_mbx_service(hw);
 	if (diag != FM10K_SUCCESS) {
 		PMD_INIT_LOG(ERR, "Failed to setup mailbox: %d", diag);
-		return -EIO;
+		ret = -EIO;
+		goto err_mbx;
 	}
 
 	/*PF/VF has different interrupt handling mechanism */
@@ -3200,7 +3203,8 @@ eth_fm10k_dev_init(struct rte_eth_dev *dev)
 
 		if (switch_ready == false) {
 			PMD_INIT_LOG(ERR, "switch is not ready");
-			return -1;
+			ret = -1;
+			goto err_switch_ready;
 		}
 	}
 
@@ -3235,7 +3239,8 @@ eth_fm10k_dev_init(struct rte_eth_dev *dev)
 
 		if (!hw->mac.default_vid) {
 			PMD_INIT_LOG(ERR, "default VID is not ready");
-			return -1;
+			ret = -1;
+			goto err_vid;
 		}
 	}
 
@@ -3244,6 +3249,28 @@ eth_fm10k_dev_init(struct rte_eth_dev *dev)
 		MAIN_VSI_POOL_NUMBER);
 
 	return 0;
+
+err_vid:
+err_switch_ready:
+	rte_intr_disable(intr_handle);
+
+	if (hw->mac.type == fm10k_mac_pf) {
+		fm10k_dev_disable_intr_pf(dev);
+		rte_intr_callback_unregister(intr_handle,
+			fm10k_dev_interrupt_handler_pf, (void *)dev);
+	} else {
+		fm10k_dev_disable_intr_vf(dev);
+		rte_intr_callback_unregister(intr_handle,
+			fm10k_dev_interrupt_handler_vf, (void *)dev);
+	}
+
+err_mbx:
+err_reset_hw:
+err_stat:
+	rte_free(dev->data->mac_addrs);
+	dev->data->mac_addrs = NULL;
+
+	return ret;
 }
 
 static int
-- 
2.34.1