linux-kernel - [PATCH net-next v2 2/4] octeon_ep: remove dma sync in trasmit path

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: <20231024145119.2366588-3-srasheed@marvell.com>
Date:   Tue, 24 Oct 2023 07:51:17 -0700
From:   Shinas Rasheed <srasheed@...vell.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <hgani@...vell.com>, <vimleshk@...vell.com>, <egallen@...hat.com>,
        <mschmidt@...hat.com>, <pabeni@...hat.com>, <horms@...nel.org>,
        <kuba@...nel.org>, <davem@...emloft.net>, <wizhao@...hat.com>,
        <konguyen@...hat.com>, Shinas Rasheed <srasheed@...vell.com>,
        "Veerasenareddy Burru" <vburru@...vell.com>,
        Sathesh Edara <sedara@...vell.com>,
        Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next v2 2/4] octeon_ep: remove dma sync in trasmit path

Cleanup dma sync calls for scatter gather
mappings, since they are coherent allocations
and do not need explicit sync to be called.

Signed-off-by: Shinas Rasheed <srasheed@...vell.com>
---
V2:
  - Provided more details in changelog
V1: https://lore.kernel.org/all/20231023114449.2362147-2-srasheed@marvell.com/

 drivers/net/ethernet/marvell/octeon_ep/octep_main.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
index 2c86b911a380..1c02304677c9 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
@@ -872,9 +872,6 @@ static netdev_tx_t octep_start_xmit(struct sk_buff *skb,
 		if (dma_mapping_error(iq->dev, dma))
 			goto dma_map_err;
 
-		dma_sync_single_for_cpu(iq->dev, tx_buffer->sglist_dma,
-					OCTEP_SGLIST_SIZE_PER_PKT,
-					DMA_TO_DEVICE);
 		memset(sglist, 0, OCTEP_SGLIST_SIZE_PER_PKT);
 		sglist[0].len[3] = len;
 		sglist[0].dma_ptr[0] = dma;
@@ -894,10 +891,6 @@ static netdev_tx_t octep_start_xmit(struct sk_buff *skb,
 			frag++;
 			si++;
 		}
-		dma_sync_single_for_device(iq->dev, tx_buffer->sglist_dma,
-					   OCTEP_SGLIST_SIZE_PER_PKT,
-					   DMA_TO_DEVICE);
-
 		hw_desc->dptr = tx_buffer->sglist_dma;
 	}
 
-- 
2.25.1