Several Ethernet device structures are allocated on top of a common PCI
device for mlx4 adapters with multiple ports. These inherit a common
interrupt handle from their parent PCI device, which prevents Rx interrupts
from working properly on all ports as their configuration is overwritten.
Use a local interrupt handle to address this issue.
Fixes: 9f05a4b81809 ("net/mlx4: support user space Rx interrupt event")
Signed-off-by: Adrien Mazarguil <adrien.mazarg...@6wind.com>
Acked-by: Moti Haimovsky <mo...@mellanox.com>
---
drivers/net/mlx4/mlx4.c | 9 +++++++++
drivers/net/mlx4/mlx4.h | 1 +
2 files changed, 10 insertions(+)
diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c
index 178562e..2b4722f 100644
--- a/drivers/net/mlx4/mlx4.c
+++ b/drivers/net/mlx4/mlx4.c
@@ -6207,6 +6207,15 @@ mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct
rte_pci_device *pci_dev)
eth_dev->device->driver = &mlx4_driver.driver;
+ /*
+ * Copy and override interrupt handle to prevent it from
+ * being shared between all ethdev instances of a given PCI
+ * device. This is required to properly handle Rx interrupts
+ * on all ports.
+ */
+ priv->intr_handle_dev = *eth_dev->intr_handle;
+ eth_dev->intr_handle = &priv->intr_handle_dev;
+
priv->dev = eth_dev;
eth_dev->dev_ops = &mlx4_dev_ops;
diff --git a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h
index c46fc23..b74fbf8 100644
--- a/drivers/net/mlx4/mlx4.h
+++ b/drivers/net/mlx4/mlx4.h
@@ -345,6 +345,7 @@ struct priv {
unsigned int txqs_n; /* TX queues array size. */
struct rxq *(*rxqs)[]; /* RX queues. */
struct txq *(*txqs)[]; /* TX queues. */
+ struct rte_intr_handle intr_handle_dev; /* Device interrupt handler. */
struct rte_intr_handle intr_handle; /* Interrupt handler. */
struct rte_flow_drop *flow_drop_queue; /* Flow drop queue. */
LIST_HEAD(mlx4_flows, rte_flow) flows;
--
2.1.4
