netdev - [net 08/18] net/mlx5: Fix turn-off PPS command

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Date:   Wed, 10 Mar 2021 11:03:32 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
        Aya Levin <ayal@...dia.com>,
        Eran Ben Elisha <eranbe@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: [net 08/18] net/mlx5: Fix turn-off PPS command

From: Aya Levin <ayal@...dia.com>

Fix a bug of uninitialized pin index when trying to turn off PPS out.

Fixes: de19cd6cc977 ("net/mlx5: Move some PPS logic into helper functions")
Signed-off-by: Aya Levin <ayal@...dia.com>
Reviewed-by: Eran Ben Elisha <eranbe@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
index b0e129d0f6d8..1e7f26b240de 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
@@ -495,15 +495,15 @@ static int mlx5_perout_configure(struct ptp_clock_info *ptp,
 		return -EINVAL;
 
 	field_select = MLX5_MTPPS_FS_ENABLE;
+	pin = ptp_find_pin(clock->ptp, PTP_PF_PEROUT, rq->perout.index);
+	if (pin < 0)
+		return -EBUSY;
+
 	if (on) {
 		bool rt_mode = mlx5_real_time_mode(mdev);
 		u32 nsec;
 		s64 sec;
 
-		pin = ptp_find_pin(clock->ptp, PTP_PF_PEROUT, rq->perout.index);
-		if (pin < 0)
-			return -EBUSY;
-
 		pin_mode = MLX5_PIN_MODE_OUT;
 		pattern = MLX5_OUT_PATTERN_PERIODIC;
 		ts.tv_sec = rq->perout.period.sec;
-- 
2.29.2