net/sfc: fix outer L4 checksum Rx

[ upstream commit 13fe18b ]

Do not return "GOOD" flag if the status was bad.

Fixes: 9e6e7f4 ("net/sfc: support Rx checksum offload for EF100")

Signed-off-by: Thierry Herbelot <thierry.herbelot@6wind.com>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>

drivers/net/sfc/sfc_ef100_rx.c

@@ -211,7 +211,7 @@ sfc_ef100_rx_tun_outer_l4_csum(const efx_word_t class)
 	return EFX_WORD_FIELD(class,
 			      ESF_GZ_RX_PREFIX_HCLASS_TUN_OUTER_L4_CSUM) ==
 		ESE_GZ_RH_HCLASS_L4_CSUM_GOOD ?
-		PKT_RX_OUTER_L4_CKSUM_GOOD : PKT_RX_OUTER_L4_CKSUM_GOOD;
+		PKT_RX_OUTER_L4_CKSUM_GOOD : PKT_RX_OUTER_L4_CKSUM_BAD;
 }
 
 static uint32_t