i40e: prevent null pointer exception in dump descriptor
Check that rings were allocated before trying to reference them.
Change-Id: I33151e55ab7a7a305fecdb88ccb2709ac246b7c7
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
index 18296f8..0ce0664 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
@@ -782,6 +782,12 @@
dev_info(&pf->pdev->dev, "dump desc tx <vsi_seid> <ring_id> [<desc_n>]\n");
return;
}
+ if (!vsi->tx_rings) {
+ dev_info(&pf->pdev->dev,
+ "descriptor rings have not been allocated for vsi %d\n",
+ vsi_seid);
+ return;
+ }
if (is_rx_ring)
ring = *vsi->rx_rings[ring_id];
else