linux-kernel - [PATCH v2 10/17] NTB: Do not advance transport RX on link down

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Message-Id: <a7621c0356f7d6886f5f761f471fc3ede94704ed.1432196075.git.Allen.Hubbe@emc.com>
Date:	Thu, 21 May 2015 04:20:54 -0400
From:	Allen Hubbe <Allen.Hubbe@....com>
To:	linux-ntb@...glegroups.com
Cc:	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	Jon Mason <jdmason@...zu.us>,
	Dave Jiang <dave.jiang@...el.com>,
	Allen Hubbe <Allen.Hubbe@....com>
Subject: [PATCH v2 10/17] NTB: Do not advance transport RX on link down

On link down, don't advance RX index to the next entry.  The next entry
should never be valid after receiving the link down flag.

Signed-off-by: Allen Hubbe <Allen.Hubbe@....com>
---
 drivers/ntb/ntb_transport.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index e2d4258..6260016 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -1212,8 +1212,7 @@ static int ntb_process_rxc(struct ntb_transport_qp *qp)
 		dev_dbg(&qp->ndev->pdev->dev, "link down flag set\n");
 		ntb_qp_link_down(qp);
 		hdr->flags = 0;
-		iowrite32(qp->rx_index, &qp->rx_info->entry);
-		return 0;
+		return -EAGAIN;
 	}
 
 	if (hdr->ver != (u32)qp->rx_pkts) {
-- 
2.4.0.rc0.43.gcf8a8c6

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