> -----Original Message-----
> From: Taekyung Kim <kim.tae.ky...@navercorp.com>
> Sent: Tuesday, November 8, 2022 4:56 PM
> To: dev@dpdk.org
> Cc: Xia, Chenbo <chenbo....@intel.com>; Pei, Andy <andy....@intel.com>;
> kim.tae.ky...@navercorp.com; maxime.coque...@redhat.com;
> sta...@dpdk.org; Wang, Xiao W <xiao.w.w...@intel.com>
> Subject: [PATCH v4] vdpa/ifc: fix update_datapath error handling
>
> Stop and return the error code when update_datapath fails.
> update_datapath prepares resources for the vdpa device.
> The driver should not perform any further actions if update_datapath returns
> an
> error.
>
> Fixes: a3f8150eac6d ("net/ifcvf: add ifcvf vDPA driver")
> Cc: sta...@dpdk.org
>
> Signed-off-by: Taekyung Kim <kim.tae.ky...@navercorp.com>
> ---
> v4:
> * Add rte_vdpa_unregister_device in ifcvf_pci_probe
>
> v3:
> * Fix coding style
>
> v2:
> * Revert the prepared resources before returning an error
> * Rebase to 22.11 rc2
> * Add fixes and cc for backport
>
> ---
> drivers/vdpa/ifc/ifcvf_vdpa.c | 27 +++++++++++++++++++++++----
> 1 file changed, 23 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/vdpa/ifc/ifcvf_vdpa.c b/drivers/vdpa/ifc/ifcvf_vdpa.c
> index
> 8dfd49336e..49d68ad1b1 100644
> --- a/drivers/vdpa/ifc/ifcvf_vdpa.c
> +++ b/drivers/vdpa/ifc/ifcvf_vdpa.c
> @@ -1098,7 +1098,12 @@ ifcvf_dev_config(int vid)
> internal = list->internal;
> internal->vid = vid;
> rte_atomic32_set(&internal->dev_attached, 1);
> - update_datapath(internal);
> + if (update_datapath(internal) < 0) {
> + DRV_LOG(ERR, "failed to update datapath for vDPA device %s",
> + vdev->device->name);
> + rte_atomic32_set(&internal->dev_attached, 0);
> + return -1;
> + }
>
> hw = &internal->hw;
> for (i = 0; i < hw->nr_vring; i++) {
> @@ -1146,7 +1151,12 @@ ifcvf_dev_close(int vid)
> internal->sw_fallback_running = false;
> } else {
> rte_atomic32_set(&internal->dev_attached, 0);
> - update_datapath(internal);
> + if (update_datapath(internal) < 0) {
> + DRV_LOG(ERR, "failed to update datapath for vDPA
> device %s",
> + vdev->device->name);
> + internal->configured = 0;
> + return -1;
> + }
> }
>
> internal->configured = 0;
> @@ -1752,7 +1762,15 @@ ifcvf_pci_probe(struct rte_pci_driver *pci_drv
> __rte_unused,
> }
>
> rte_atomic32_set(&internal->started, 1);
> - update_datapath(internal);
> + if (update_datapath(internal) < 0) {
> + DRV_LOG(ERR, "failed to update datapath %s", pci_dev->name);
> + rte_atomic32_set(&internal->started, 0);
> + rte_vdpa_unregister_device(internal->vdev);
> + pthread_mutex_lock(&internal_list_lock);
> + TAILQ_REMOVE(&internal_list, list, next);
> + pthread_mutex_unlock(&internal_list_lock);
> + goto error;
> + }
>
> rte_kvargs_free(kvlist);
> return 0;
> @@ -1781,7 +1799,8 @@ ifcvf_pci_remove(struct rte_pci_device *pci_dev)
>
> internal = list->internal;
> rte_atomic32_set(&internal->started, 0);
> - update_datapath(internal);
> + if (update_datapath(internal) < 0)
> + DRV_LOG(ERR, "failed to update datapath %s", pci_dev->name);
>
> rte_pci_unmap_device(internal->pdev);
> rte_vfio_container_destroy(internal->vfio_container_fd);
> --
> 2.34.1
Acked-by: Andy Pei <andy....@intel.com>
