[PATCH v6 19/45] net/sxe2: guard PCI BAR unmap when not initialized

[liujie5 at linkdatatechnology.com]

From: Jie Liu <liujie5 at linkdatatechnology.com>

sxe2_dev_pci_map_uinit() calls sxe2_dev_pci_seg_unmap() and walks
bar_info unconditionally. Only perform the unmap and free when
bar_info has been allocated, so an uninitialized map context is
handled cleanly.

Fixes: 66a10eb60ebe ("net/sxe2: add PCI BAR mapping")
Cc: stable at dpdk.org
Cc: stephen at networkplumber.org
Signed-off-by: Jie Liu <liujie5 at linkdatatechnology.com>
---
 drivers/net/sxe2/sxe2_ethdev.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/net/sxe2/sxe2_ethdev.c b/drivers/net/sxe2/sxe2_ethdev.c
index 9ef93b8076..fdff4ae10f 100644
--- a/drivers/net/sxe2/sxe2_ethdev.c
+++ b/drivers/net/sxe2/sxe2_ethdev.c
@@ -1773,14 +1773,13 @@ void sxe2_dev_pci_map_uinit(struct rte_eth_dev *dev)
 	uint8_t i = 0;
 
 	PMD_INIT_FUNC_TRACE();
+	if (map_ctxt->bar_info != NULL) {
+		(void)sxe2_dev_pci_seg_unmap(adapter, SXE2_PCI_MAP_RES_DOORBELL_RX_TAIL);
+		(void)sxe2_dev_pci_seg_unmap(adapter, SXE2_PCI_MAP_RES_DOORBELL_TX);
+		(void)sxe2_dev_pci_seg_unmap(adapter, SXE2_PCI_MAP_RES_IRQ_DYN);
+		(void)sxe2_dev_pci_seg_unmap(adapter, SXE2_PCI_MAP_RES_IRQ_ITR);
+		(void)sxe2_dev_pci_seg_unmap(adapter, SXE2_PCI_MAP_RES_IRQ_MSIX);
 
-	(void)sxe2_dev_pci_seg_unmap(adapter, SXE2_PCI_MAP_RES_DOORBELL_RX_TAIL);
-	(void)sxe2_dev_pci_seg_unmap(adapter, SXE2_PCI_MAP_RES_DOORBELL_TX);
-	(void)sxe2_dev_pci_seg_unmap(adapter, SXE2_PCI_MAP_RES_IRQ_DYN);
-	(void)sxe2_dev_pci_seg_unmap(adapter, SXE2_PCI_MAP_RES_IRQ_ITR);
-	(void)sxe2_dev_pci_seg_unmap(adapter, SXE2_PCI_MAP_RES_IRQ_MSIX);
-
-	if (map_ctxt != NULL && map_ctxt->bar_info != NULL) {
 		for (i = 0; i < map_ctxt->bar_cnt; i++) {
 			bar_info = &map_ctxt->bar_info[i];
 			if (bar_info != NULL && bar_info->seg_info != NULL) {
@@ -1791,7 +1790,6 @@ void sxe2_dev_pci_map_uinit(struct rte_eth_dev *dev)
 		rte_free(map_ctxt->bar_info);
 		map_ctxt->bar_info = NULL;
 	}
-
 	adapter->dev_info.dev_data = NULL;
 }
 
-- 
2.52.0