Re: [PATCH v1 4/4] bus/pci: add VFIO sparse mmap support

[Stephen Hemminger]

On Mon, 15 May 2023 06:47:00 +0000
Miao Li <miao...@intel.com> wrote:

> +                             map_addr = pci_map_resource(addr, vfio_dev_fd,
> +                                     bar->offset + sparse->offset, 
> sparse->size,
> +                                     RTE_MAP_FORCE_ADDRESS);
> +                             if (map_addr == NULL) {
> +                                     munmap(bar_addr, bar->size);
> +                                     RTE_LOG(ERR, EAL, "Failed to map pci 
> BAR%d\n",
> +                                             bar_index);

If mmap() fails then printing errno would help diagnose why.