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

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Message-Id: <20220919183907.6689-1-vfedorenko@novek.ru>
Date:   Mon, 19 Sep 2022 21:39:07 +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>,
        Richard Cochran <richardcochran@...il.com>
Subject: [PATCH net] bnxt_en: 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.

Fixes: 11862689e8f1 ("bnxt_en: Configure ptp filters during bnxt open")
Cc: Richard Cochran <richardcochran@...il.com>
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