[dpdk-stable] patch 'net/ixgbe: fix TDH register write' has been queued to stable release 18.08.1
Kevin Traynor
ktraynor at redhat.com
Thu Nov 29 14:21:18 CET 2018
Hi,
FYI, your patch has been queued to stable release 18.08.1
Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 12/08/18. So please
shout if anyone has objections.
Also note that after the patch there's a diff of the upstream commit vs the patch applied
to the branch. If the code is different (ie: not only metadata diffs), due for example to
a change in context or macro names, please double check it.
Thanks.
Kevin Traynor
---
>From c17e2a231e0f1605711fca1d9415b1d46bea5747 Mon Sep 17 00:00:00 2001
From: Yanglong Wu <yanglong.wu at intel.com>
Date: Tue, 20 Nov 2018 13:59:21 +0800
Subject: [PATCH] net/ixgbe: fix TDH register write
[ upstream commit ff30a020bb400f04bf64a91416993862f45f9ada ]
The only time that software should write to the TDH register
is after a reset (hardware reset or CTRL.RST) and
before enabling the transmit function (TXDCTL.ENABLE).
If software were to write to this register while the transmit
function was enabled, the on-chip descriptor buffers might
be invalidated and the hardware could become confused.
Fixes: 029fd06d40fa ("ixgbe: queue start and stop")
Signed-off-by: Yanglong Wu <yanglong.wu at intel.com>
Acked-by: Qi Zhang <qi.z.zhang at intel.com>
---
drivers/net/ixgbe/ixgbe_rxtx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
index 792727353..4bfd2a422 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -5265,4 +5265,5 @@ ixgbe_dev_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id)
txq = dev->data->tx_queues[tx_queue_id];
+ IXGBE_WRITE_REG(hw, IXGBE_TDH(txq->reg_idx), 0);
txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(txq->reg_idx));
txdctl |= IXGBE_TXDCTL_ENABLE;
@@ -5282,5 +5283,4 @@ ixgbe_dev_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id)
}
rte_wmb();
- IXGBE_WRITE_REG(hw, IXGBE_TDH(txq->reg_idx), 0);
IXGBE_WRITE_REG(hw, IXGBE_TDT(txq->reg_idx), 0);
dev->data->tx_queue_state[tx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
--
2.19.0
---
Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- - 2018-11-29 13:11:36.967718855 +0000
+++ 0077-net-ixgbe-fix-TDH-register-write.patch 2018-11-29 13:11:35.000000000 +0000
@@ -1,8 +1,10 @@
-From ff30a020bb400f04bf64a91416993862f45f9ada Mon Sep 17 00:00:00 2001
+From c17e2a231e0f1605711fca1d9415b1d46bea5747 Mon Sep 17 00:00:00 2001
From: Yanglong Wu <yanglong.wu at intel.com>
Date: Tue, 20 Nov 2018 13:59:21 +0800
Subject: [PATCH] net/ixgbe: fix TDH register write
+[ upstream commit ff30a020bb400f04bf64a91416993862f45f9ada ]
+
The only time that software should write to the TDH register
is after a reset (hardware reset or CTRL.RST) and
before enabling the transmit function (TXDCTL.ENABLE).
@@ -11,7 +13,6 @@
be invalidated and the hardware could become confused.
Fixes: 029fd06d40fa ("ixgbe: queue start and stop")
-Cc: stable at dpdk.org
Signed-off-by: Yanglong Wu <yanglong.wu at intel.com>
Acked-by: Qi Zhang <qi.z.zhang at intel.com>
@@ -20,7 +21,7 @@
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
-index 2f0262ae1..ddc7efa87 100644
+index 792727353..4bfd2a422 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -5265,4 +5265,5 @@ ixgbe_dev_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id)
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