netdev - Re: [net-2.6 PATCH 2/2] ixgbe: Do not return 0 in ixgbe_fcoe_ddp() upon FCP

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Message-Id: <20090813.201424.36467757.davem@davemloft.net>
Date:	Thu, 13 Aug 2009 20:14:24 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jeffrey.t.kirsher@...el.com
Cc:	netdev@...r.kernel.org, gospo@...hat.com, yi.zou@...el.com,
	peter.p.waskiewicz.jr@...el.com
Subject: Re: [net-2.6 PATCH 2/2] ixgbe: Do not return 0 in ixgbe_fcoe_ddp()
 upon FCP_RSP in DDP completion

From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Date: Thu, 13 Aug 2009 17:09:58 -0700

> From: Yi Zou <yi.zou@...el.com>
> 
> We return the ddp->len in ixgbe_fcoe_ddp() to indicate the length of data that
> have been DDPed. However, it is possible that the length is 0, e.g., for SCSI
> READ, the FCP_RSP may come back w/ SCSI status 0x28 as Task Set Full with no FCP
> data for DDP. In ixgbe_fcoe_ddp(), we return 0 to indicate not passing DDPed
> packets to upper layer. Therefore in the case of ddp->len being 0 upon FCP_RSP,
> we do not want to return the 0 ddp->len as we want FCP_RSP to be always
> delivered to the upper layer. This patch fixes this bug by setting rc only if
> ddp->len is non-zero.
> 
> Signed-off-by: Yi Zou <yi.zou@...el.com>
> Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

Applied.
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