netdev - Re: [PATCH v2 15/22] fjes: net_device_ops.ndo_vlan_rx_add/kill

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Date:	Mon, 13 Jul 2015 09:54:20 -0700 (PDT)
From:	Yasuaki Ishimatsu <yasu.isimatu@...il.com>
To:	Taku Izumi <izumi.taku@...fujitsu.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net,
	platform-driver-x86@...r.kernel.org, dvhart@...radead.org,
	rkhan@...hat.com, alexander.h.duyck@...hat.com,
	linux-acpi@...r.kernel.org, joe@...ches.com,
	sergei.shtylyov@...entembedded.com, stephen@...workplumber.org,
	Yasuaki Ishimatsu <yasu.isimatu@...il.com>
Subject: Re: [PATCH v2 15/22] fjes: net_device_ops.ndo_vlan_rx_add/kill_vid

Hi Izumi-san,

On Wed, 24 Jun 2015 11:55:47 +0900
Taku Izumi <izumi.taku@...fujitsu.com> wrote:

> This patch adds net_device_ops.ndo_vlan_rx_add_vid and
> net_device_ops.ndo_vlan_rx_kill_vid callback.
> 
> Signed-off-by: Taku Izumi <izumi.taku@...fujitsu.com>
> ---
>  drivers/net/fjes/fjes_hw.c   | 27 +++++++++++++++++++++++++++
>  drivers/net/fjes/fjes_hw.h   |  2 ++
>  drivers/net/fjes/fjes_main.c | 40 ++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 69 insertions(+)
> 
> diff --git a/drivers/net/fjes/fjes_hw.c b/drivers/net/fjes/fjes_hw.c
> index 5e3f847..8363e22 100644
> --- a/drivers/net/fjes/fjes_hw.c
> +++ b/drivers/net/fjes/fjes_hw.c
> @@ -827,6 +827,33 @@ bool fjes_hw_check_vlan_id(struct epbuf_handler *epbh, u16 vlan_id)
>  	return ret;
>  }
>  
> +bool fjes_hw_set_vlan_id(struct epbuf_handler *epbh, u16 vlan_id)
> +{
> +	union ep_buffer_info *info = epbh->info;
> +	int i;
> +
> +	for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++) {
> +		if (info->v1i.vlan_id[i] == 0) {
> +			info->v1i.vlan_id[i] = vlan_id;
> +			return true;
> +		}
> +	}
> +	return false;
> +}
> +
> +void fjes_hw_del_vlan_id(struct epbuf_handler *epbh, u16 vlan_id)
> +{
> +	union ep_buffer_info *info = epbh->info;
> +	int i;
> +

> +	if (0 != vlan_id) {

How about using the following if statement so than you can delete
indent?

	if (vlan_id == 0)
		return;

> +		for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++) {
> +			if (vlan_id == info->v1i.vlan_id[i])
> +				info->v1i.vlan_id[i] = 0;
> +		}
> +	}
> +}
> +
>  bool fjes_hw_epbuf_rx_is_empty(struct epbuf_handler *epbh)
>  {
>  	union ep_buffer_info *info = epbh->info;
> diff --git a/drivers/net/fjes/fjes_hw.h b/drivers/net/fjes/fjes_hw.h
> index ea30aeb..afad03e 100644
> --- a/drivers/net/fjes/fjes_hw.h
> +++ b/drivers/net/fjes/fjes_hw.h
> @@ -321,6 +321,8 @@ int fjes_hw_epid_is_shared(struct fjes_device_shared_info *, int);
>  bool fjes_hw_check_epbuf_version(struct epbuf_handler *, u32);
>  bool fjes_hw_check_mtu(struct epbuf_handler *, u32);
>  bool fjes_hw_check_vlan_id(struct epbuf_handler *, u16);
> +bool fjes_hw_set_vlan_id(struct epbuf_handler *, u16);
> +void fjes_hw_del_vlan_id(struct epbuf_handler *, u16);
>  bool fjes_hw_epbuf_rx_is_empty(struct epbuf_handler *);
>  void *fjes_hw_epbuf_rx_curpkt_get_addr(struct epbuf_handler *, size_t *);
>  void fjes_hw_epbuf_rx_curpkt_drop(struct epbuf_handler *);
> diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
> index e2e69e0..bb4c8e4 100644
> --- a/drivers/net/fjes/fjes_main.c
> +++ b/drivers/net/fjes/fjes_main.c
> @@ -58,6 +58,8 @@ static irqreturn_t fjes_intr(int, void*);
>  static struct rtnl_link_stats64 *
>  fjes_get_stats64(struct net_device *, struct rtnl_link_stats64 *);
>  static int fjes_change_mtu(struct net_device *, int);
> +static int fjes_vlan_rx_add_vid(struct net_device *, __be16 proto, u16);
> +static int fjes_vlan_rx_kill_vid(struct net_device *, __be16 proto, u16);
>  static void fjes_tx_retry(struct net_device *);
>  
>  static int fjes_acpi_add(struct acpi_device *);
> @@ -229,6 +231,8 @@ static const struct net_device_ops fjes_netdev_ops = {
>  	.ndo_get_stats64	= fjes_get_stats64,
>  	.ndo_change_mtu		= fjes_change_mtu,
>  	.ndo_tx_timeout		= fjes_tx_retry,
> +	.ndo_vlan_rx_add_vid	= fjes_vlan_rx_add_vid,
> +	.ndo_vlan_rx_kill_vid = fjes_vlan_rx_kill_vid,
>  };
>  
>  /* fjes_open - Called when a network interface is made active */
> @@ -757,6 +761,42 @@ static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
>  	return -EINVAL;
>  }
>  
> +static int fjes_vlan_rx_add_vid(struct net_device *netdev,
> +				__be16 proto, u16 vid)
> +{
> +	struct fjes_adapter *adapter = netdev_priv(netdev);
> +	bool ret = true;
> +	int epid;
> +
> +	for (epid = 0; epid < adapter->hw.max_epid; epid++) {
> +		if (epid == adapter->hw.my_epid)
> +			continue;
> +
> +		if (!fjes_hw_check_vlan_id(
> +			&adapter->hw.ep_shm_info[epid].tx, vid))
> +			ret = fjes_hw_set_vlan_id(
> +				&adapter->hw.ep_shm_info[epid].tx, vid);
> +	}
> +
> +	return ret ? 0 : -ENOSPC;
> +}
> +

> +static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
> +				 __be16 proto, u16 vid)

The function always returns 0. So how about defining the function
as void?

Thanks,
Ysauaki Ishimatsu

> +{
> +	struct fjes_adapter *adapter = netdev_priv(netdev);
> +	int epid;
> +
> +	for (epid = 0; epid < adapter->hw.max_epid; epid++) {
> +		if (epid == adapter->hw.my_epid)
> +			continue;
> +
> +		fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid);
> +	}
> +
> +	return 0;
> +}
> +
>  static irqreturn_t fjes_intr(int irq, void *data)
>  {
>  	struct fjes_adapter *adapter = data;
> -- 
> 1.8.3.1
> 
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