From: "Zhang, Helin" <helin.zhang@intel.com>
To: "Tao, Zhe" <zhe.tao@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH] i40e: Fix the clean up function for i40e, the DD bits are multiplex with descriptor type field. so cannot use "not zero" as the rule for the completion of Tx descriptor
Date: Thu, 16 Jul 2015 19:20:16 +0000 [thread overview]
Message-ID: <F35DEAC7BCE34641BA9FAC6BCA4A12E70A895BCB@SHSMSX104.ccr.corp.intel.com> (raw)
In-Reply-To: <1435943507-2679-1-git-send-email-zhe.tao@intel.com>
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Zhe Tao
> Sent: Friday, July 3, 2015 10:12 AM
> To: dev@dpdk.org
> Subject: [dpdk-dev] [PATCH] i40e: Fix the clean up function for i40e, the DD bits
> are multiplex with descriptor type field. so cannot use "not zero" as the rule for
> the completion of Tx descriptor
>
> If the descriptor in the position desc_to_clean_to is the context descriptor its
> type will be 0x1, so using the not expression, the device driver will consider the
> descriptor has been complete for transmission even its DTYPE field is still 0x1
> which means NIC has't finished the operation on this descriptor.
>
> Signed-off-by: Zhe Tao <zhe.tao@intel.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>
prev parent reply other threads:[~2015-07-16 19:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-03 17:11 Zhe Tao
2015-07-08 9:29 ` [dpdk-dev] [PATCH v2] i40e:Fix the Description Done check mechanism for i40e Zhe Tao
2015-07-09 2:58 ` [dpdk-dev] [PATCH v3] i40e:Fix the Descriptor " Zhe Tao
2015-07-09 3:31 ` Wu, Jingjing
2015-07-10 16:56 ` Thomas Monjalon
2015-07-16 19:20 ` Zhang, Helin [this message]
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