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[91.219.240.17]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45cb5693921sm240950065e9.0.2025.09.08.02.58.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Sep 2025 02:58:50 -0700 (PDT) From: Vitaly Kuznetsov To: Li Tian , netdev@vger.kernel.org, linux-hyperv@vger.kernel.org Cc: Saeed Mahameed , Tariq Toukan , Mark Bloch , Leon Romanovsky , Haiyang Zhang , Benjamin Poirier Subject: Re: [PATCH net] net/mlx5: Not returning mlx5_link_info table when speed is unknown In-Reply-To: <20250908085313.18768-1-litian@redhat.com> References: <20250908085313.18768-1-litian@redhat.com> Date: Mon, 08 Sep 2025 12:58:49 +0300 Message-ID: <877by9fep2.fsf@redhat.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Li Tian writes: > Because mlx5e_link_mode is sparse e.g. Azure mlx5 reports PTYS 19. > Do not return it when speed unless retrieved successfully. > > Fixes: 65a5d35571849 ("net/mlx5: Refactor link speed handling with mlx5_link_info struct") > Suggested-by: Vitaly Kuznetsov > Signed-off-by: Li Tian > --- > drivers/net/ethernet/mellanox/mlx5/core/port.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/ethernet/mellanox/mlx5/core/port.c b/drivers/net/ethernet/mellanox/mlx5/core/port.c > index 2d7adf7444ba..a69c83da2542 100644 > --- a/drivers/net/ethernet/mellanox/mlx5/core/port.c > +++ b/drivers/net/ethernet/mellanox/mlx5/core/port.c > @@ -1170,7 +1170,11 @@ const struct mlx5_link_info *mlx5_port_ptys2info(struct mlx5_core_dev *mdev, > mlx5e_port_get_link_mode_info_arr(mdev, &table, &max_size, > force_legacy); > i = find_first_bit(&temp, max_size); > - if (i < max_size) > + /* > + * mlx5e_link_mode is sparse. Check speed The array is either 'mlx5e_link_mode' or 'mlx5e_ext_link_info' but both have holes in them. > + * is non-zero as indication of a hole. > + */ > + if (i < max_size && table[i].speed) > return &table[i]; > > return NULL; -- Vitaly