net/mlx5e: Set PTP channel pointer explicitly to NULL

[ Upstream commit 1c2cdf0b603a3b0c763288ad92e9f3f1555925cf ]

When closing the PTP channel, set its pointer explicitly to NULL. PTP
channel is opened on demand, the code verify the pointer validity before
access. Nullify it when closing the PTP channel to avoid unexpected
behavior.

Fixes: 145e5637d941 ("net/mlx5e: Add TX PTP port object support")
Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index e479cce3e2b1beacb5d31da74f34c06071be8b29..3248741af44048787733a78e4638503f7709b578 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -2443,8 +2443,10 @@ void mlx5e_close_channels(struct mlx5e_channels *chs)
 {
        int i;
 
-       if (chs->port_ptp)
+       if (chs->port_ptp) {
                mlx5e_port_ptp_close(chs->port_ptp);
+               chs->port_ptp = NULL;
+       }
 
        for (i = 0; i < chs->num; i++)
                mlx5e_close_channel(chs->c[i]);