netdev - [PATCH net] net: bnxt: replace reset with config timestamps

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-next>] [day] [month] [year] [list]

Message-Id: <20220919174423.31146-1-vfedorenko@novek.ru>
Date:   Mon, 19 Sep 2022 20:44:23 +0300
From:   Vadim Fedorenko <vfedorenko@...ek.ru>
To:     Michael Chan <michael.chan@...adcom.com>,
        Pavan Chebbi <pavan.chebbi@...adcom.com>,
        netdev@...r.kernel.org
Cc:     Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Vadim Fedorenko <vfedorenko@...ek.ru>
Subject: [PATCH net] net: bnxt: replace reset with config timestamps

Any change to the hardware timestamps configuration triggers nic restart,
which breaks transmition and reception of network packets for a while.
But there is no need to fully restart the device because while configuring
hardware timestamps. The code for changing configuration runs after all
of the initialisation, when the NIC is actually up and running. This patch
changes the code that ioctl will only update configuration registers and
will not trigger carrier status change. Tested on BCM57504.

Signed-off-by: Vadim Fedorenko <vfedorenko@...ek.ru>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
index 8e316367f6ce..36e9148468b5 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
@@ -505,10 +505,8 @@ static int bnxt_hwrm_ptp_cfg(struct bnxt *bp)
 	ptp->tstamp_filters = flags;
 
 	if (netif_running(bp->dev)) {
-		rc = bnxt_close_nic(bp, false, false);
-		if (!rc)
-			rc = bnxt_open_nic(bp, false, false);
-		if (!rc && !ptp->tstamp_filters)
+		bnxt_ptp_cfg_tstamp_filters(bp);
+		if (!ptp->tstamp_filters)
 			rc = -EIO;
 	}
 
-- 
2.27.0