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Groups > linux.kernel > #1330344
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| From | Alexander Kochetkov <al.kochet@gmail.com> |
| Newsgroups | linux.kernel |
| Subject | [PATCH 2/3] net: arc_emac: reset txbd_curr and txbd_dirty pointers to zero |
| Date | Tue, 09 Feb 2016 16:30:02 +0100 |
| Message-ID | <r0ioO-5QL-25@gated-at.bofh.it> (permalink) |
| References | <r0ioN-5QL-3@gated-at.bofh.it> |
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EMAC reset internal tx ring pointer to zero at statup.
txbd_curr and txbd_dirty can be different from zero.
That cause ethernet transfer hang (no packets transmitted).
In order to reproduce, run on device:
ifconfig eth0 down
ifconfig eth0 up
Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
---
CC: stable@vger.kernel.org # 3.18.x-
---
drivers/net/ethernet/arc/emac_main.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/arc/emac_main.c b/drivers/net/ethernet/arc/emac_main.c
index 63a63e3..4f6e5be 100644
--- a/drivers/net/ethernet/arc/emac_main.c
+++ b/drivers/net/ethernet/arc/emac_main.c
@@ -447,6 +447,9 @@ static int arc_emac_open(struct net_device *ndev)
*last_rx_bd = (*last_rx_bd + 1) % RX_BD_NUM;
}
+ priv->txbd_curr = 0;
+ priv->txbd_dirty = 0;
+
/* Clean Tx BD's */
memset(priv->txbd, 0, TX_RING_SZ);
--
1.7.9.5
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[PATCH 2/3] net: arc_emac: reset txbd_curr and txbd_dirty pointers to zero Alexander Kochetkov <al.kochet@gmail.com> - 2016-02-09 16:30 +0100
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