From: Julian Wiedmann <jwi@linux.ibm.com>
Date: Thu, 20 Feb 2020 15:54:56 +0100
Subject: s390/qeth: fix off-by-one in RX copybreak check
Git-commit: 54a61fbc020fd2e305680871c453abcf7fc0339b
Patch-mainline: v5.6-rc3
References: git-fixes
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@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/s390/net/qeth_core_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -5301,7 +5301,7 @@ struct sk_buff *qeth_core_get_next_skb(s
return NULL;
}
- if (((skb_len >= card->options.rx_sg_cb) &&
+ if (((skb_len > card->options.rx_sg_cb) &&
(!(card->info.type == QETH_CARD_TYPE_OSN)) &&
(!atomic_read(&card->force_alloc_skb))) ||
(card->options.cq == QETH_CQ_ENABLED))