From: Michael Chan <michael.chan@broadcom.com>
To: davem@davemloft.net
Cc: netdev@vger.kernel.org
Subject: [PATCH net-next] bnxt_en: Fix xmit_more with BQL.
Date: Tue, 30 May 2017 20:03:00 -0400 [thread overview]
Message-ID: <1496188980-13392-1-git-send-email-michael.chan@broadcom.com> (raw)
We need to write the doorbell if BQL has stopped the queue and
skb->xmit_more is set. Otherwise it is possible for the tx queue to
rot and cause tx timeout.
Fixes: 4d172f21cefe ("bnxt_en: Implement xmit_more.")
Suggested-by: Yuval Mintz <yuval.mintz@cavium.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 954758f..c1cd72a 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -463,7 +463,7 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
prod = NEXT_TX(prod);
txr->tx_prod = prod;
- if (!skb->xmit_more)
+ if (!skb->xmit_more || netif_xmit_stopped(txq))
bnxt_db_write(bp, txr->tx_doorbell, DB_KEY_TX | prod);
tx_done:
--
1.8.3.1
next reply other threads:[~2017-05-31 0:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-31 0:03 Michael Chan [this message]
2017-05-31 2:38 ` [PATCH net-next] bnxt_en: Fix xmit_more with BQL David Miller
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