From: Ben Hutchings <ben@decadent.org.uk>
To: Edward Cree <ecree@solarflare.com>
Cc: Robert Stonehouse <rstonehouse@solarflare.com>,
Daniel Borkmann <dborkman@redhat.com>,
davem@davemloft.net, nikolay@redhat.com, netdev@vger.kernel.org,
Shradha Shah <sshah@solarflare.com>,
Jon Cooper <jcooper@solarflare.com>,
linux-net-drivers <linux-net-drivers@solarflare.com>
Subject: Re: [PATCH net-next] sfc: add support for skb->xmit_more
Date: Wed, 22 Oct 2014 09:58:43 +0100 [thread overview]
Message-ID: <1413968323.5994.6.camel@decadent.org.uk> (raw)
In-Reply-To: <alpine.LFD.2.03.1410171512070.3218@solarflare.com>
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On Fri, 2014-10-17 at 15:32 +0100, Edward Cree wrote:
[...]
> @@ -351,7 +343,7 @@ netdev_tx_t efx_enqueue_skb(struct efx_tx_queue *tx_queue, struct sk_buff *skb)
> unsigned short dma_flags;
> int i = 0;
>
> - EFX_BUG_ON_PARANOID(tx_queue->write_count != tx_queue->insert_count);
> + EFX_BUG_ON_PARANOID(tx_queue->write_count > tx_queue->insert_count);
[...]
Doesn't this break after 2^32 descriptors? It seems like you would need
a similar comparison to time_after(); possibly:
EFX_BUG_ON_PARANOID((int)(tx_queue->write_count - tx_queue->insert_count) > 0);
Ben.
--
Ben Hutchings
For every action, there is an equal and opposite criticism. - Harrison
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next prev parent reply other threads:[~2014-10-22 8:59 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-13 16:59 [PATCH] sfc: efx: add support for skb->xmit_more Daniel Borkmann
2014-10-13 18:02 ` Edward Cree
2014-10-13 19:18 ` Daniel Borkmann
2014-10-14 18:41 ` [PATCH RFC net-next] sfc: " Edward Cree
2014-10-14 21:15 ` David Miller
2014-10-15 11:05 ` Edward Cree
2014-10-15 16:20 ` David Miller
2014-10-16 15:42 ` Jonathan Cooper
2014-10-16 16:36 ` Robert Stonehouse
2014-10-17 14:32 ` [PATCH " Edward Cree
2014-10-18 3:47 ` David Miller
2014-10-22 8:58 ` Ben Hutchings [this message]
2014-10-22 12:36 ` Edward Cree
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