[PATCH iwl-next] ixgbe: fix cls_u32 nexthdr path returning success when no entry installed

ixgbe_configure_clsu32() returns 0 (success) after the nexthdr loop
even when ixgbe_clsu32_build_input() fails for every candidate entry
and no jump-table slot is actually programmed.  Callers that test the
return value would then falsely believe the filter was installed.

The variable 'err' already tracks the last ixgbe_clsu32_build_input()
return value; if the loop completes with a successful break, err is 0.
If all attempts failed, err holds the last failure code.  Change the
unconditional 'return 0' to 'return err' so errors are propagated
correctly.

Signed-off-by: Aleksandr Loktionov <redacted>
Reviewed-by: Marcin Szycik <redacted>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index db954e9..8ac80ff 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -10311,7 +10311,7 @@ static int ixgbe_configure_clsu32(struct ixgbe_adapter *adapter,
 				kfree(jump);
 			}
 		}
-		return 0;
+		return err;
 	}
 
 	input = kzalloc_obj(*input);

-- 
2.52.0