Re: [PATCH v2 2/2] net/mlx5: fix probe return value polarity

["Nélio Laranjeiro" <nelio.laranjeiro@6wind.com>]

On Thu, May 03, 2018 at 10:59:37AM +0300, Shahaf Shuler wrote:
> mlx5 prefixed function returns a negative errno value.
> the error handler on mlx5_pci_probe is doing the same.
> 
> Fixes: a6d83b6a9209 ("net/mlx5: standardize on negative errno values")
> Cc: nelio.laranjeiro@6wind.com
> 
> Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
> ---
> 
> On v2:
>  - fixed more polarity issues on different mlx5_* functions.
>  - aligned verb calls return values. 
> 
> ---
>  drivers/net/mlx5/mlx5.c | 31 ++++++++++++++++++++++---------
>  1 file changed, 22 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
> index 46cb370a29..7afdae863f 100644
> --- a/drivers/net/mlx5/mlx5.c
> +++ b/drivers/net/mlx5/mlx5.c
> @@ -751,8 +751,9 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
>  	DRV_LOG(WARNING,
>  		"tunnel offloading disabled due to old OFED/rdma-core version");
>  #endif
> -	if (mlx5_glue->query_device_ex(attr_ctx, NULL, &device_attr)) {
> -		err = errno;
> +	err = mlx5_glue->query_device_ex(attr_ctx, NULL, &device_attr);
> +	if (err) {
> +		DRV_LOG(ERR, "ibv_query_device_ex() failed");

Should be DEBUG() and not DRV_LOG().

>  		goto error;
>  	}
>  	DRV_LOG(INFO, "%u port(s) detected",
> @@ -800,16 +801,22 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
>  			eth_dev->device = &pci_dev->device;
>  			eth_dev->dev_ops = &mlx5_dev_sec_ops;
>  			err = mlx5_uar_init_secondary(eth_dev);
> -			if (err)
> +			if (err) {
> +				err = rte_errno;
>  				goto error;
> +			}
>  			/* Receive command fd from primary process */
>  			err = mlx5_socket_connect(eth_dev);
> -			if (err < 0)
> +			if (err < 0) {
> +				err = rte_errno;
>  				goto error;
> +			}
>  			/* Remap UAR for Tx queues. */
>  			err = mlx5_tx_uar_remap(eth_dev, err);
> -			if (err)
> +			if (err) {
> +				err = rte_errno;
>  				goto error;
> +			}
>  			/*
>  			 * Ethdev pointer is still required as input since
>  			 * the primary device is not accessible from the
> @@ -873,11 +880,12 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
>  		if (err) {
>  			DRV_LOG(ERR, "failed to process device arguments: %s",
>  				strerror(err));
> +			err = rte_errno;
>  			goto port_error;
>  		}
> -		if (mlx5_glue->query_device_ex(ctx, NULL, &device_attr_ex)) {
> +		err = mlx5_glue->query_device_ex(ctx, NULL, &device_attr_ex);
> +		if (err) {
>  			DRV_LOG(ERR, "ibv_query_device_ex() failed");
> -			err = errno;
>  			goto port_error;
>  		}
>  		config.hw_csum = !!(device_attr_ex.device_cap_flags_ex &
> @@ -952,8 +960,10 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
>  		rte_eth_copy_pci_info(eth_dev, pci_dev);
>  		eth_dev->device->driver = &mlx5_driver.driver;
>  		err = mlx5_uar_init_primary(eth_dev);
> -		if (err)
> +		if (err) {
> +			err = rte_errno;
>  			goto port_error;
> +		}
>  		/* Configure the first MAC address by default. */
>  		if (mlx5_get_mac(eth_dev, &mac.addr_bytes)) {
>  			DRV_LOG(ERR,
> @@ -983,8 +993,10 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
>  #endif
>  		/* Get actual MTU if possible. */
>  		err = mlx5_get_mtu(eth_dev, &priv->mtu);
> -		if (err)
> +		if (err) {
> +			err = rte_errno;
>  			goto port_error;
> +		}
>  		DRV_LOG(DEBUG, "port %u MTU is %u", eth_dev->data->port_id,
>  			priv->mtu);
>  		/*
> @@ -1031,6 +1043,7 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
>  		if (err) {
>  			DRV_LOG(ERR, "port %u drop queue allocation failed: %s",
>  				eth_dev->data->port_id, strerror(rte_errno));
> +			err = rte_errno;
>  			goto port_error;
>  		}
>  		/* Supported Verbs flow priority number detection. */
> -- 
> 2.12.0

Unless the small comment above, 
Acked-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>

Thanks,

-- 
Nélio Laranjeiro
6WIND