netdev - Re: [PATCH v2 2/2] IB/mlx5: Free resources during PCI error

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Date:	Mon, 17 Mar 2014 15:32:55 +0200
From:	Eli Cohen <eli@....mellanox.co.il>
To:	clsoto@...ux.vnet.ibm.com
Cc:	eli@...lanox.com, roland@...nel.org, sean.hefty@...el.com,
	hal.rosenstock@...il.com, linux-rdma@...r.kernel.org,
	netdev@...r.kernel.org, brking@...ux.vnet.ibm.com
Subject: Re: [PATCH v2 2/2] IB/mlx5: Free resources during PCI error

On Fri, Mar 14, 2014 at 12:14:58PM -0500, clsoto@...ux.vnet.ibm.com wrote:

Hi Carol, see my comments below.
Also, can please share with us if you've been making any testing to
these patches, how you tested and what were the results?
 
> @@ -471,9 +471,12 @@ static void clean_keys(struct mlx5_ib_de
>  		ent->size--;
>  		spin_unlock_irq(&ent->lock);
>  		err = mlx5_core_destroy_mkey(&dev->mdev, &mr->mmr);
> -		if (err)
> -			mlx5_ib_warn(dev, "failed destroy mkey\n");
> -		else
> +		if (err) {
> +			if (pci_channel_offline(dev->mdev.pdev))
> +				kfree(mr);

Why not just check if -EIO returned.

> +			else
> +				mlx5_ib_warn(dev, "failed destroy mkey\n");
> +		} else
>  			kfree(mr);
>  	}
>  }
> Index: b/drivers/infiniband/hw/mlx5/qp.c
> ===================================================================
> --- a/drivers/infiniband/hw/mlx5/qp.c
> +++ b/drivers/infiniband/hw/mlx5/qp.c
> @@ -2564,7 +2564,11 @@ int mlx5_ib_dealloc_xrcd(struct ib_xrcd 
>  
>  	err = mlx5_core_xrcd_dealloc(&dev->mdev, xrcdn);
>  	if (err) {
> -		mlx5_ib_warn(dev, "failed to dealloc xrcdn 0x%x\n", xrcdn);
> +		if (pci_channel_offline(dev->mdev.pdev))
> +			kfree(xrcd);
> +		else
> +			mlx5_ib_warn(dev, "failed to dealloc xrcdn 0x%x\n",
> +				     xrcdn);
You chose to give special treatment to this command, why is that?
>  		return err;
>  	}
>  
--
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