[PATCH 5.10 058/188] i40e: Fix sparse error: uninitialized symbol ring

[Greg Kroah-Hartman]

From: Arkadiusz Kubalewski <arkadiusz.kubalew...@intel.com>

commit d6d04ee6d2c9bb5084c8f6074195d6aa0024e825 upstream.

Init pointer with NULL in default switch case statement.

Previously the error was produced when compiling against sparse.
i40e_debugfs.c:582 i40e_dbg_dump_desc() error: uninitialized symbol 'ring'.

Fixes: 44ea803e2fa7 ("i40e: introduce new dump desc XDP command")
Signed-off-by: Aleksandr Loktionov <aleksandr.loktio...@intel.com>
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalew...@intel.com>
Tested-by: Dave Switzer <david.swit...@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.ngu...@intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/net/ethernet/intel/i40e/i40e_debugfs.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
@@ -578,6 +578,9 @@ static void i40e_dbg_dump_desc(int cnt,
        case RING_TYPE_XDP:
                ring = kmemdup(vsi->xdp_rings[ring_id], sizeof(*ring), 
GFP_KERNEL);
                break;
+       default:
+               ring = NULL;
+               break;
        }
        if (!ring)
                return;