netdev - Re: [PATCH net-next v5 1/2] net: hns: support deferred probe when can not obtain irq

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <e4a40abb-4709-5e4d-f900-929a8f107b7f@gmail.com>
Date:   Fri, 28 Apr 2017 12:17:22 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Yankejian <yankejian@...wei.com>, davem@...emloft.net,
        salil.mehta@...wei.com, yisen.zhuang@...wei.com,
        lipeng321@...wei.com, zhouhuiru@...wei.com,
        huangdaode@...ilicon.com
Cc:     netdev@...r.kernel.org, linuxarm@...wei.com
Subject: Re: [PATCH net-next v5 1/2] net: hns: support deferred probe when can
 not obtain irq



On 28/04/17 08:49, Yankejian wrote:
> From: lipeng <lipeng321@...wei.com>
>
> In the hip06 and hip07 SoCs, the interrupt lines from the
> DSAF controllers are connected to mbigen hw module.
> The mbigen module is probed with module_init, and, as such,
> is not guaranteed to probe before the HNS driver. So we need
> to support deferred probe.
>
> Signed-off-by: lipeng <lipeng321@...wei.com>
> Reviewed-by: Yisen Zhuang <yisen.zhuang@...wei.com>
> Reviewed-by: Matthias Brugger <mbrugger@...e.com>

Looks good now, so you can keep my Reviewed-by.

> ---
> change log:
> V4 -> V5:
> 1. Float on net-next;
>
> V3 -> V4:
> 1. Delete redundant commit message;
> 2. add Reviewed-by: Matthias Brugger <mbrugger@...e.com>;
>
> V2 -> V3:
> 1. Check return value when  platform_get_irq in hns_rcb_get_cfg;
> ---
>  drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c | 4 +++-
>  drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c | 8 +++++++-
>  drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.h | 2 +-
>  3 files changed, 11 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c
> index eba406b..93e71e2 100644
> --- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c
> +++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c
> @@ -510,7 +510,9 @@ int hns_ppe_init(struct dsaf_device *dsaf_dev)
>
>  		hns_ppe_get_cfg(dsaf_dev->ppe_common[i]);
>
> -		hns_rcb_get_cfg(dsaf_dev->rcb_common[i]);
> +		ret = hns_rcb_get_cfg(dsaf_dev->rcb_common[i]);
> +		if (ret)
> +			goto get_cfg_fail;
>  	}
>
>  	for (i = 0; i < HNS_PPE_COM_NUM; i++)
> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c
> index c20a0f4..e2e2853 100644
> --- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c
> +++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c
> @@ -492,7 +492,7 @@ static int hns_rcb_get_base_irq_idx(struct rcb_common_cb *rcb_common)
>   *hns_rcb_get_cfg - get rcb config
>   *@..._common: rcb common device
>   */
> -void hns_rcb_get_cfg(struct rcb_common_cb *rcb_common)
> +int hns_rcb_get_cfg(struct rcb_common_cb *rcb_common)
>  {
>  	struct ring_pair_cb *ring_pair_cb;
>  	u32 i;
> @@ -517,10 +517,16 @@ void hns_rcb_get_cfg(struct rcb_common_cb *rcb_common)
>  		ring_pair_cb->virq[HNS_RCB_IRQ_IDX_RX] =
>  		is_ver1 ? platform_get_irq(pdev, base_irq_idx + i * 2 + 1) :
>  			  platform_get_irq(pdev, base_irq_idx + i * 3);
> +		if ((ring_pair_cb->virq[HNS_RCB_IRQ_IDX_TX] == -EPROBE_DEFER) ||
> +		    (ring_pair_cb->virq[HNS_RCB_IRQ_IDX_RX] == -EPROBE_DEFER))
> +			return -EPROBE_DEFER;
> +
>  		ring_pair_cb->q.phy_base =
>  			RCB_COMM_BASE_TO_RING_BASE(rcb_common->phy_base, i);
>  		hns_rcb_ring_pair_get_cfg(ring_pair_cb);
>  	}
> +
> +	return 0;
>  }
>
>  /**
> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.h b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.h
> index a664ee8..6028164 100644
> --- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.h
> +++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.h
> @@ -121,7 +121,7 @@ struct rcb_common_cb {
>  void hns_rcb_common_free_cfg(struct dsaf_device *dsaf_dev, u32 comm_index);
>  int hns_rcb_common_init_hw(struct rcb_common_cb *rcb_common);
>  void hns_rcb_start(struct hnae_queue *q, u32 val);
> -void hns_rcb_get_cfg(struct rcb_common_cb *rcb_common);
> +int hns_rcb_get_cfg(struct rcb_common_cb *rcb_common);
>  void hns_rcb_get_queue_mode(enum dsaf_mode dsaf_mode,
>  			    u16 *max_vfn, u16 *max_q_per_vf);
>
>