net/mlx5: fix link speed info when link is down
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Commit Message
When the link is down, the link speed returned by ethtool is
UINT32_MAX and the link status is 0.
In this case, the DPDK ethdev link speed should be set to
ETH_SPEED_NUM_NONE.
Otherwise since link speed is non-zero but link status is zero, this
is an inconsistent situation and -EAGAIN is returned, which is not right.
Fixes: 188408719888 ("net/mlx5: fix support for newer link speeds")
Cc: stable@dpdk.org
Signed-off-by: Xiaoyu Min <jackmin@mellanox.com>
---
drivers/net/mlx5/mlx5_ethdev.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
Comments
> -----Original Message-----
> From: Xiaoyu Min <jackmin@mellanox.com>
> Sent: Monday, August 5, 2019 11:02
> To: Shahaf Shuler <shahafs@mellanox.com>; Yongseok Koh
> <yskoh@mellanox.com>; Slava Ovsiienko <viacheslavo@mellanox.com>
> Cc: dev@dpdk.org; stable@dpdk.org
> Subject: [PATCH] net/mlx5: fix link speed info when link is down
>
> When the link is down, the link speed returned by ethtool is UINT32_MAX
> and the link status is 0.
>
> In this case, the DPDK ethdev link speed should be set to
> ETH_SPEED_NUM_NONE.
> Otherwise since link speed is non-zero but link status is zero, this is an
> inconsistent situation and -EAGAIN is returned, which is not right.
>
> Fixes: 188408719888 ("net/mlx5: fix support for newer link speeds")
> Cc: stable@dpdk.org
>
> Signed-off-by: Xiaoyu Min <jackmin@mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
> ---
> drivers/net/mlx5/mlx5_ethdev.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/mlx5/mlx5_ethdev.c
> b/drivers/net/mlx5/mlx5_ethdev.c index 9629cfb333..33a32fc2fa 100644
> --- a/drivers/net/mlx5/mlx5_ethdev.c
> +++ b/drivers/net/mlx5/mlx5_ethdev.c
> @@ -908,7 +908,8 @@ mlx5_link_update_unlocked_gs(struct rte_eth_dev
> *dev,
> dev->data->port_id, strerror(rte_errno));
> return ret;
> }
> - dev_link.link_speed = ecmd->speed;
> + dev_link.link_speed = (ecmd->speed == UINT32_MAX) ?
> ETH_SPEED_NUM_NONE :
> + ecmd->speed;
> sc = ecmd->link_mode_masks[0] |
> ((uint64_t)ecmd->link_mode_masks[1] << 32);
> priv->link_speed_capa = 0;
> --
> 2.21.0
Hi,
> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Xiaoyu Min
> Sent: Monday, August 5, 2019 11:02 AM
> To: Shahaf Shuler <shahafs@mellanox.com>; Yongseok Koh
> <yskoh@mellanox.com>; Slava Ovsiienko <viacheslavo@mellanox.com>
> Cc: dev@dpdk.org; stable@dpdk.org
> Subject: [dpdk-dev] [PATCH] net/mlx5: fix link speed info when link is down
>
> When the link is down, the link speed returned by ethtool is
> UINT32_MAX and the link status is 0.
>
> In this case, the DPDK ethdev link speed should be set to
> ETH_SPEED_NUM_NONE.
> Otherwise since link speed is non-zero but link status is zero, this
> is an inconsistent situation and -EAGAIN is returned, which is not right.
>
> Fixes: 188408719888 ("net/mlx5: fix support for newer link speeds")
> Cc: stable@dpdk.org
>
> Signed-off-by: Xiaoyu Min <jackmin@mellanox.com>
> ---
> drivers/net/mlx5/mlx5_ethdev.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/mlx5/mlx5_ethdev.c
> b/drivers/net/mlx5/mlx5_ethdev.c
> index 9629cfb333..33a32fc2fa 100644
> --- a/drivers/net/mlx5/mlx5_ethdev.c
> +++ b/drivers/net/mlx5/mlx5_ethdev.c
> @@ -908,7 +908,8 @@ mlx5_link_update_unlocked_gs(struct rte_eth_dev
> *dev,
> dev->data->port_id, strerror(rte_errno));
> return ret;
> }
> - dev_link.link_speed = ecmd->speed;
> + dev_link.link_speed = (ecmd->speed == UINT32_MAX) ?
> ETH_SPEED_NUM_NONE :
> + ecmd->speed;
> sc = ecmd->link_mode_masks[0] |
> ((uint64_t)ecmd->link_mode_masks[1] << 32);
> priv->link_speed_capa = 0;
> --
> 2.21.0
Patch applied to next-net-mlx,
Kindest regards,
Raslan Darawsheh
@@ -908,7 +908,8 @@ mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev,
dev->data->port_id, strerror(rte_errno));
return ret;
}
- dev_link.link_speed = ecmd->speed;
+ dev_link.link_speed = (ecmd->speed == UINT32_MAX) ? ETH_SPEED_NUM_NONE :
+ ecmd->speed;
sc = ecmd->link_mode_masks[0] |
((uint64_t)ecmd->link_mode_masks[1] << 32);
priv->link_speed_capa = 0;