[PATCH AUTOSEL 5.5 54/66] s390/qeth: fix off-by-one in RX copybreak check

[Sasha Levin]

From: Julian Wiedmann <jwi@xxxxxxxxxxxxx>

[ Upstream commit 54a61fbc020fd2e305680871c453abcf7fc0339b ]

The RX copybreak is intended as the _max_ value where the frame's data
should be copied. So for frame_len == copybreak, don't build an SG skb.

Fixes: 4a71df50047f ("qeth: new qeth device driver")
Signed-off-by: Julian Wiedmann <jwi@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/s390/net/qeth_core_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 623475717183e..4fd7b0ceb4ffd 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -5141,7 +5141,7 @@ struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
 	}
 
 	use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
-		    ((skb_len >= card->options.rx_sg_cb) &&
+		    (skb_len > card->options.rx_sg_cb &&
 		     !atomic_read(&card->force_alloc_skb) &&
 		     !IS_OSN(card));
 
-- 
2.20.1