netdev - Re: [PATCH 2/2] net/cxgb4: Don't retrieve stats during recovery

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: <52DD3447.7000504@cogentembedded.com>
Date:	Mon, 20 Jan 2014 18:35:51 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Gavin Shan <shangw@...ux.vnet.ibm.com>, netdev@...r.kernel.org
CC:	dm@...lsio.com
Subject: Re: [PATCH 2/2] net/cxgb4: Don't retrieve stats during recovery

Hello.

On 20-01-2014 7:05, Gavin Shan wrote:

> We possiblly retrieve the adapter's statistics during EEH recovery

    Only "possibly".

> and that should be disallowed. Otherwise, it would possibly incur
> replicate EEH error and EEH recovery is going to fail eventually.
> The patch checks if the PCI device is off-line before statistic
> retrieval.

> Signed-off-by: Gavin Shan <shangw@...ux.vnet.ibm.com>
> ---
>   drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c |   11 +++++++++++
>   1 file changed, 11 insertions(+)
>
> diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
> index c8eafbf..b0e72fb 100644
> --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
> +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
> @@ -4288,6 +4288,17 @@ static struct rtnl_link_stats64 *cxgb_get_stats(struct net_device *dev,
>   	struct port_info *p = netdev_priv(dev);
>   	struct adapter *adapter = p->adapter;
>
> +	/*
> +	 * We possibly retrieve the statistics while the PCI
> +	 * device is off-line. That would cause the recovery
> +	 * on off-lined PCI device going to fail. So it's
> +	 * reasonable to block it during the recovery period.
> +	 */

    The multi-line comment style in the networking code is somewhat special:

/* bla
  * bla
  */

WBR, Sergei

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html