netdev - Re: [PATCH net-next] nfp: correct cleanup related to DCB resources

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Date:   Wed, 1 Feb 2023 11:30:34 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Simon Horman <simon.horman@...igine.com>
Cc:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        oss-drivers@...igine.com, Huayu Chen <huayu.chen@...igine.com>,
        Niklas Söderlund 
        <niklas.soderlund@...igine.com>
Subject: Re: [PATCH net-next] nfp: correct cleanup related to DCB resources

On Tue, Jan 31, 2023 at 05:30:33PM +0100, Simon Horman wrote:
> From: Huayu Chen <huayu.chen@...igine.com>
> 
> This patch corrects two oversights relating to releasing resources
> and DCB initialisation.
> 
> 1. If mapping of the dcbcfg_tbl area fails: an error should be
>    propagated, allowing partial initialisation (probe) to be unwound.
> 
> 2. Conversely, if where dcbcfg_tbl is successfully mapped: it should
>    be unmapped in nfp_nic_dcb_clean() which is called via various error
>    cleanup paths, and shutdown or removal of the PCIE device.
> 
> Fixes: 9b7fe8046d74 ("nfp: add DCB IEEE support")
> Signed-off-by: Huayu Chen <huayu.chen@...igine.com>
> Reviewed-by: Niklas Söderlund <niklas.soderlund@...igine.com>
> Signed-off-by: Simon Horman <simon.horman@...igine.com>
> ---
>  drivers/net/ethernet/netronome/nfp/nic/main.c | 8 ++++++--
>  drivers/net/ethernet/netronome/nfp/nic/main.h | 2 +-
>  2 files changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/ethernet/netronome/nfp/nic/main.c b/drivers/net/ethernet/netronome/nfp/nic/main.c
> index f78c2447d45b..9dd5afe37f6e 100644
> --- a/drivers/net/ethernet/netronome/nfp/nic/main.c
> +++ b/drivers/net/ethernet/netronome/nfp/nic/main.c
> @@ -32,9 +32,12 @@ static void nfp_nic_sriov_disable(struct nfp_app *app)
>  
>  static int nfp_nic_vnic_init(struct nfp_app *app, struct nfp_net *nn)
>  {
> -	nfp_nic_dcb_init(nn);
> +	return nfp_nic_dcb_init(nn);
> +}
>  
> -	return 0;
> +static void nfp_nic_vnic_clean(struct nfp_app *app, struct nfp_net *nn)
> +{
> +	nfp_nic_dcb_clean(nn);
>  }
>  
>  static int nfp_nic_vnic_alloc(struct nfp_app *app, struct nfp_net *nn,
> @@ -72,4 +75,5 @@ const struct nfp_app_type app_nic = {
>  	.sriov_disable	= nfp_nic_sriov_disable,
>  
>  	.vnic_init      = nfp_nic_vnic_init,
> +	.vnic_clean     = nfp_nic_vnic_clean,
>  };
> diff --git a/drivers/net/ethernet/netronome/nfp/nic/main.h b/drivers/net/ethernet/netronome/nfp/nic/main.h
> index 7ba04451b8ba..094374df42b8 100644
> --- a/drivers/net/ethernet/netronome/nfp/nic/main.h
> +++ b/drivers/net/ethernet/netronome/nfp/nic/main.h
> @@ -33,7 +33,7 @@ struct nfp_dcb {
>  int nfp_nic_dcb_init(struct nfp_net *nn);
>  void nfp_nic_dcb_clean(struct nfp_net *nn);
>  #else
> -static inline int nfp_nic_dcb_init(struct nfp_net *nn) {return 0; }
> +static inline int nfp_nic_dcb_init(struct nfp_net *nn) { return 0; }

Not related change, but I would do the same.

Thanks,
Reviewed-by: Leon Romanovsky <leonro@...dia.com>