[PATCH net-next 8/8] ionic: extend ts_config set locking

From: Shannon Nelson <snelson@pensando.io>
To: netdev@vger.kernel.org, davem@davemloft.net, kuba@kernel.org,
	richardcochran@gmail.com
Cc: drivers@pensando.io, Shannon Nelson <snelson@pensando.io>
Subject: [PATCH net-next 8/8] ionic: extend ts_config set locking
Date: Wed,  7 Apr 2021 16:20:01 -0700	[thread overview]
Message-ID: <20210407232001.16670-9-snelson@pensando.io> (raw)
In-Reply-To: <20210407232001.16670-1-snelson@pensando.io>

Make sure the configuration is locked before
operating on it for the replay.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
---
 drivers/net/ethernet/pensando/ionic/ionic_phc.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_phc.c b/drivers/net/ethernet/pensando/ionic/ionic_phc.c
index 2bb749097d9e..177dbf89affd 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_phc.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_phc.c
@@ -79,6 +79,8 @@ static int ionic_lif_hwstamp_set_ts_config(struct ionic_lif *lif,
 	if (!lif->phc || !lif->phc->ptp)
 		return -EOPNOTSUPP;
 
+	mutex_lock(&lif->phc->config_lock);
+
 	if (new_ts) {
 		config = new_ts;
 	} else {
@@ -96,12 +98,16 @@ static int ionic_lif_hwstamp_set_ts_config(struct ionic_lif *lif,
 	}
 
 	tx_mode = ionic_hwstamp_tx_mode(config->tx_type);
-	if (tx_mode < 0)
-		return tx_mode;
+	if (tx_mode < 0) {
+		err = tx_mode;
+		goto err_queues;
+	}
 
 	mask = cpu_to_le64(BIT_ULL(tx_mode));
-	if ((ionic->ident.lif.eth.hwstamp_tx_modes & mask) != mask)
-		return -ERANGE;
+	if ((ionic->ident.lif.eth.hwstamp_tx_modes & mask) != mask) {
+		err = -ERANGE;
+		goto err_queues;
+	}
 
 	rx_filt = ionic_hwstamp_rx_filt(config->rx_filter);
 	rx_all = config->rx_filter != HWTSTAMP_FILTER_NONE && !rx_filt;
@@ -116,8 +122,6 @@ static int ionic_lif_hwstamp_set_ts_config(struct ionic_lif *lif,
 	dev_dbg(ionic->dev, "config_rx_filter %d rx_filt %#llx rx_all %d\n",
 		config->rx_filter, rx_filt, rx_all);
 
-	mutex_lock(&lif->phc->config_lock);
-
 	if (tx_mode) {
 		err = ionic_lif_create_hwstamp_txq(lif);
 		if (err)
-- 
2.17.1

