lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20231012101706.2291551-1-srasheed@marvell.com>
Date:   Thu, 12 Oct 2023 03:17:06 -0700
From:   Shinas Rasheed <srasheed@...vell.com>
To:     <pabeni@...hat.com>, <linux-kernel@...r.kernel.org>
CC:     <davem@...emloft.net>, <edumazet@...gle.com>, <egallen@...hat.com>,
        <hgani@...vell.com>, <kuba@...nel.org>, <mschmidt@...hat.com>,
        <netdev@...r.kernel.org>, <srasheed@...vell.com>,
        <sedara@...vell.com>, <vburru@...vell.com>, <vimleshk@...vell.com>
Subject: [net PATCH v2] octeon_ep: update BQL sent bytes before ringing doorbell

Sometimes Tx is completed immediately after doorbell is updated, which
causes Tx completion routing to update completion bytes before the
same packet bytes are updated in sent bytes in transmit function, hence
hitting BUG_ON() in dql_completed(). To avoid this, update BQL
sent bytes before ringing doorbell.

Fixes: 37d79d059606 ("octeon_ep: add Tx/Rx processing and interrupt support")
Signed-off-by: Shinas Rasheed <srasheed@...vell.com>
---
V1 -> V2: Call netdev_tx_sent_queue before memory barrier

 drivers/net/ethernet/marvell/octeon_ep/octep_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
index dbc518ff8276..15420325aef3 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
@@ -715,6 +715,7 @@ static netdev_tx_t octep_start_xmit(struct sk_buff *skb,
 		hw_desc->dptr = tx_buffer->sglist_dma;
 	}
 
+	netdev_tx_sent_queue(iq->netdev_q, skb->len);
 	/* Flush the hw descriptor before writing to doorbell */
 	wmb();
 
@@ -726,7 +727,6 @@ static netdev_tx_t octep_start_xmit(struct sk_buff *skb,
 		wi = 0;
 	iq->host_write_index = wi;
 
-	netdev_tx_sent_queue(iq->netdev_q, skb->len);
 	iq->stats.instr_posted++;
 	skb_tx_timestamp(skb);
 	return NETDEV_TX_OK;
-- 
2.25.1

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ