[PATCH] net: ionic: free VF resources on remove

[Guangshuo Li <lgs201920130244@gmail.com>]

ionic_probe() allocates VF tracking data and maps a statistics buffer
for each already enabled VF with ionic_vf_alloc().

The probe failure path releases these resources with
ionic_vf_dealloc(). However, after a successful probe, ionic_remove()
tears down the LIF and device without releasing the VF resources.

This leaves the VF tracking allocation and statistics DMA mappings
behind when the PF driver is removed.

Call ionic_vf_dealloc() before deinitializing the LIF so the VF
statistics addresses can be cleared and the associated DMA mappings
and tracking data released.

This issue was found by manual code inspection.

Fixes: fbb39807e9ae ("ionic: support sr-iov operations")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
---
 drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
index 05f19489ec5c..666efe972de7 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
@@ -424,6 +424,7 @@ static void ionic_remove(struct pci_dev *pdev)
 		ionic_auxbus_unregister(ionic->lif);
 		ionic_lif_unregister(ionic->lif);
 		ionic_devlink_unregister(ionic);
+		ionic_vf_dealloc(ionic);
 		ionic_lif_deinit(ionic->lif);
 		ionic_lif_free(ionic->lif);
 		ionic->lif = NULL;
-- 
2.43.0