linux-kernel - Re: [PATCH 1/4]: Spidernet stop queue when queue is full

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: <200610040019.43028.arnd@arndb.de>
Date:	Wed, 4 Oct 2006 00:19:42 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Linas Vepstas <linas@...tin.ibm.com>
Cc:	akpm@...l.org, jeff@...zik.org, netdev@...r.kernel.org,
	James K Lewis <jklewis@...ibm.com>,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org
Subject: Re: [PATCH 1/4]: Spidernet stop queue when queue is full

On Tuesday 03 October 2006 22:57, Linas Vepstas wrote:
> +       if ((chain->head->next == chain->tail->prev) ||
> +          (spider_net_get_descr_status(descr) != SPIDER_NET_DESCR_NOT_IN_USE)) {
>                 result = NETDEV_TX_LOCKED;
>                 goto out;
>         }

...

>  out:
> -       netif_wake_queue(netdev);
> +       card->netdev_stats.tx_dropped++;
> +       netif_stop_queue(netdev);
>         return result;
>  }

Hmm, this looks a little strange to me. I would assume that we should not
stop the queue when the device is locked, but only when it is busy.

I would assume though that the fix is to return NETDEV_TX_BUSY instead
of NETDEV_TX_LOCKED in the case above, while the netif_stop_queue()
is correct here.

	Arnd <><
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/