[PATCH net] igc: Fix passing 0 to ERR_PTR in igc_xdp_run_prog()

[Yue Haibing]

Return NULL instead of passing to ERR_PTR while res is IGC_XDP_PASS,
which is zero, this fix smatch warnings:
drivers/net/ethernet/intel/igc/igc_main.c:2533
 igc_xdp_run_prog() warn: passing zero to 'ERR_PTR'

Fixes: 26575105d6ed ("igc: Add initial XDP support")
Signed-off-by: Yue Haibing <yuehaibing@xxxxxxxxxx>
---
 drivers/net/ethernet/intel/igc/igc_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 6e70bca15db1..c3d6e20c0be0 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -2530,7 +2530,7 @@ static struct sk_buff *igc_xdp_run_prog(struct igc_adapter *adapter,
 	res = __igc_xdp_run_prog(adapter, prog, xdp);
 
 out:
-	return ERR_PTR(-res);
+	return res ? ERR_PTR(-res) : NULL;
 }
 
 /* This function assumes __netif_tx_lock is held by the caller. */
-- 
2.34.1