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This patch fixes mlx4 port start failure when called by the failsafe PMD for removed devices. Fixes: a6e8b01c3c26 ("net/mlx4: compact interrupt functions") Cc: stable@dpdk.org Signed-off-by: Moti Haimovsky --- V2: Fixed commit message. --- drivers/net/mlx4/mlx4.c | 10 ++++++++-- drivers/net/mlx4/mlx4.h | 2 ++ drivers/net/mlx4/mlx4_intr.c | 43 ++++++++++++++++++++++++++++++++++++++++--- 3 files changed, 50 insertions(+), 5 deletions(-) diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c index 61c5bf4..c67b221 100644 --- a/drivers/net/mlx4/mlx4.c +++ b/drivers/net/mlx4/mlx4.c @@ -108,7 +108,13 @@ struct mlx4_conf { " flow error type %d, cause %p, message: %s", -ret, strerror(-ret), error.type, error.cause, error.message ? error.message : "(unspecified)"); + goto exit; } + ret = mlx4_intr_install(priv); + if (ret) + ERROR("%p: interrupt handler installation failed", + (void *)dev); +exit: return ret; } @@ -141,7 +147,7 @@ struct mlx4_conf { (void *)dev, strerror(-ret)); goto err; } - ret = mlx4_intr_install(priv); + ret = mlx4_intr_enable(priv); if (ret) { ERROR("%p: interrupt handler installation failed", (void *)dev); @@ -187,7 +193,7 @@ struct mlx4_conf { dev->rx_pkt_burst = mlx4_rx_burst_removed; rte_wmb(); mlx4_flow_sync(priv, NULL); - mlx4_intr_uninstall(priv); + mlx4_intr_disable(priv); mlx4_rss_deinit(priv); } diff --git a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h index 99dc335..ab4f396 100644 --- a/drivers/net/mlx4/mlx4.h +++ b/drivers/net/mlx4/mlx4.h @@ -176,6 +176,8 @@ int mlx4_flow_ctrl_set(struct rte_eth_dev *dev, int mlx4_intr_uninstall(struct priv *priv); int mlx4_intr_install(struct priv *priv); +int mlx4_intr_enable(struct priv *priv); +void mlx4_intr_disable(struct priv *priv); int mlx4_rx_intr_disable(struct rte_eth_dev *dev, uint16_t idx); int mlx4_rx_intr_enable(struct rte_eth_dev *dev, uint16_t idx); diff --git a/drivers/net/mlx4/mlx4_intr.c b/drivers/net/mlx4/mlx4_intr.c index 9becee4..eeab625 100644 --- a/drivers/net/mlx4/mlx4_intr.c +++ b/drivers/net/mlx4/mlx4_intr.c @@ -73,6 +73,8 @@ { struct rte_intr_handle *intr_handle = &priv->intr_handle; + if (intr_handle == NULL || intr_handle->intr_vec == NULL) + return; rte_intr_free_epoll_fd(intr_handle); free(intr_handle->intr_vec); intr_handle->nb_efd = 0; @@ -291,7 +293,7 @@ } rte_eal_alarm_cancel((void (*)(void *))mlx4_link_status_alarm, priv); priv->intr_alarm = 0; - mlx4_rx_intr_vec_disable(priv); + mlx4_intr_disable(priv); rte_errno = err; return 0; } @@ -313,8 +315,6 @@ int rc; mlx4_intr_uninstall(priv); - if (intr_conf->rxq && mlx4_rx_intr_vec_enable(priv) < 0) - goto error; if (intr_conf->lsc | intr_conf->rmv) { priv->intr_handle.fd = priv->ctx->async_fd; rc = rte_intr_callback_register(&priv->intr_handle, @@ -395,3 +395,40 @@ } return -ret; } + +/** + * Enable datapath interrupts. + * + * @param priv + * Pointer to private structure. + * + * @return + * 0 on success, negative errno value otherwise and rte_errno is set. + */ +int +mlx4_intr_enable(struct priv *priv) +{ + const struct rte_intr_conf *const intr_conf = + &priv->dev->data->dev_conf.intr_conf; + + if (intr_conf->rxq && mlx4_rx_intr_vec_enable(priv) < 0) + goto error; + return 0; +error: + return -rte_errno; +} + +/** + * Disable datapath interrupts, keeping other interrupts intact. + * + * @param priv + * Pointer to private structure. + */ +void +mlx4_intr_disable(struct priv *priv) +{ + int err = rte_errno; /* Make sure rte_errno remains unchanged. */ + + mlx4_rx_intr_vec_disable(priv); + rte_errno = err; +} -- 1.8.3.1