netdev - [PATCH] ucc_geth: Reset BQL queue when stopping device

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Date:   Mon, 28 Jan 2019 10:07:47 +0100
From:   Mathias Thore <mathias.thore@...inera.com>
To:     leoyang.li@....com, netdev@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, david.gounaris@...inera.com,
        joakim.tjernlund@...inera.com
Cc:     Mathias Thore <mathias.thore@...inera.com>
Subject: [PATCH] ucc_geth: Reset BQL queue when stopping device

After a timeout event caused by for example a broadcast storm, when
the MAC and PHY are reset, the BQL TX queue needs to be reset as
well. Otherwise, the device will exhibit severe performance issues
even after the storm has ended.

Co-authored-by: David Gounaris <david.gounaris@...inera.com>
Signed-off-by: Mathias Thore <mathias.thore@...inera.com>
---
 drivers/net/ethernet/freescale/ucc_geth.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/freescale/ucc_geth.c b/drivers/net/ethernet/freescale/ucc_geth.c
index c3d539e209ed..eb3e65e8868f 100644
--- a/drivers/net/ethernet/freescale/ucc_geth.c
+++ b/drivers/net/ethernet/freescale/ucc_geth.c
@@ -1879,6 +1879,8 @@ static void ucc_geth_free_tx(struct ucc_geth_private *ugeth)
 	u16 i, j;
 	u8 __iomem *bd;
 
+	netdev_reset_queue(ugeth->ndev);
+
 	ug_info = ugeth->ug_info;
 	uf_info = &ug_info->uf_info;
 
-- 
2.19.2