net/mlx5: fw_tracer, Zero consumer index when reloading the tracer

When tracer is reloaded, the device will log the traces at the
beginning of the log buffer. Also, driver is reading the log buffer in
chunks in accordance to the consumer index.
Hence, zero consumer index when reloading the tracer.

Fixes: 4383cfcc ("net/mlx5: Add devlink reload")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c

@@ -757,6 +757,7 @@ static int mlx5_fw_tracer_set_mtrc_conf(struct mlx5_fw_tracer *tracer)
 	if (err)
 		mlx5_core_warn(dev, "FWTracer: Failed to set tracer configurations %d\n", err);
 
+	tracer->buff.consumer_index = 0;
 	return err;
 }
 
@@ -821,7 +822,6 @@ static void mlx5_fw_tracer_ownership_change(struct work_struct *work)
 	mlx5_core_dbg(tracer->dev, "FWTracer: ownership changed, current=(%d)\n", tracer->owner);
 	if (tracer->owner) {
 		tracer->owner = false;
-		tracer->buff.consumer_index = 0;
 		return;
 	}