net/mlx5: fix uninit value use

Avoid use of uninitialized state variable.

In case of mlx5e_tx_reporter_build_diagnose_output_sq_common() it's better
to still collect other data than bail out entirely.

Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/netdev/8bd30131-c9f2-4075-a575-7fa2793a1760@moroto.mountain
Fixes: d17f98b ("net/mlx5: devlink health: use retained error fmsg API")
Signed-off-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Link: https://lore.kernel.org/r/20231025145050.36114-1-przemyslaw.kitszel@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/mellanox/mlx5/core/en/reporter_rx.c

@@ -263,8 +263,12 @@ mlx5e_rx_reporter_build_diagnose_output_rq_common(struct mlx5e_rq *rq,
 	if (rq->icosq) {
 		struct mlx5e_icosq *icosq = rq->icosq;
 		u8 icosq_hw_state;
+		int err;
+
+		err = mlx5_core_query_sq_state(rq->mdev, icosq->sqn, &icosq_hw_state);
+		if (err)
+			return err;
 
-		mlx5_core_query_sq_state(rq->mdev, icosq->sqn, &icosq_hw_state);
 		mlx5e_reporter_icosq_diagnose(icosq, icosq_hw_state, fmsg);
 	}
 

drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c

@@ -221,12 +221,16 @@ mlx5e_tx_reporter_build_diagnose_output_sq_common(struct devlink_fmsg *fmsg,
 	bool stopped = netif_xmit_stopped(sq->txq);
 	struct mlx5e_priv *priv = sq->priv;
 	u8 state;
+	int err;
 
-	mlx5_core_query_sq_state(priv->mdev, sq->sqn, &state);
 	devlink_fmsg_u32_pair_put(fmsg, "tc", tc);
 	devlink_fmsg_u32_pair_put(fmsg, "txq ix", sq->txq_ix);
 	devlink_fmsg_u32_pair_put(fmsg, "sqn", sq->sqn);
-	devlink_fmsg_u8_pair_put(fmsg, "HW state", state);
+
+	err = mlx5_core_query_sq_state(priv->mdev, sq->sqn, &state);
+	if (!err)
+		devlink_fmsg_u8_pair_put(fmsg, "HW state", state);
+
 	devlink_fmsg_bool_pair_put(fmsg, "stopped", stopped);
 	devlink_fmsg_u32_pair_put(fmsg, "cc", sq->cc);
 	devlink_fmsg_u32_pair_put(fmsg, "pc", sq->pc);