Re: [RFC v4 04/21] vfio-user: add region cache

[Alex Williamson <alex.williamson@redhat.com>]

On Tue, 11 Jan 2022 16:43:40 -0800
John Johnson <john.g.johnson@oracle.com> wrote:

> diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
> index 0cf69a8..223bd02 100644
> --- a/hw/vfio/pci-quirks.c
> +++ b/hw/vfio/pci-quirks.c
> @@ -1601,16 +1601,14 @@ int vfio_pci_nvidia_v100_ram_init(VFIOPCIDevice *vdev, Error **errp)
>  
>      hdr = vfio_get_region_info_cap(nv2reg, VFIO_REGION_INFO_CAP_NVLINK2_SSATGT);
>      if (!hdr) {
> -        ret = -ENODEV;
> -        goto free_exit;
> +        return -ENODEV;
>      }
>      cap = (void *) hdr;
>  
>      p = mmap(NULL, nv2reg->size, PROT_READ | PROT_WRITE,
>               MAP_SHARED, vdev->vbasedev.fd, nv2reg->offset);
>      if (p == MAP_FAILED) {
> -        ret = -errno;
> -        goto free_exit;
> +        return -errno;
>      }
>  
>      quirk = vfio_quirk_alloc(1);
> @@ -1623,7 +1621,7 @@ int vfio_pci_nvidia_v100_ram_init(VFIOPCIDevice *vdev, Error **errp)
>                          (void *) (uintptr_t) cap->tgt);
>      trace_vfio_pci_nvidia_gpu_setup_quirk(vdev->vbasedev.name, cap->tgt,
>                                            nv2reg->size);
> -free_exit:
> +
>      g_free(nv2reg);

Shouldn't this g_free() be removed as well?

>  
>      return ret;
> @@ -1651,16 +1649,14 @@ int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp)
>      hdr = vfio_get_region_info_cap(atsdreg,
>                                     VFIO_REGION_INFO_CAP_NVLINK2_SSATGT);
>      if (!hdr) {
> -        ret = -ENODEV;
> -        goto free_exit;
> +        return -ENODEV;
>      }
>      captgt = (void *) hdr;
>  
>      hdr = vfio_get_region_info_cap(atsdreg,
>                                     VFIO_REGION_INFO_CAP_NVLINK2_LNKSPD);
>      if (!hdr) {
> -        ret = -ENODEV;
> -        goto free_exit;
> +        return -ENODEV;
>      }
>      capspeed = (void *) hdr;
>  
> @@ -1669,8 +1665,7 @@ int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp)
>          p = mmap(NULL, atsdreg->size, PROT_READ | PROT_WRITE,
>                   MAP_SHARED, vdev->vbasedev.fd, atsdreg->offset);
>          if (p == MAP_FAILED) {
> -            ret = -errno;
> -            goto free_exit;
> +            return -errno;
>          }
>  
>          quirk = vfio_quirk_alloc(1);
> @@ -1690,8 +1685,6 @@ int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp)
>                          (void *) (uintptr_t) capspeed->link_speed);
>      trace_vfio_pci_nvlink2_setup_quirk_lnkspd(vdev->vbasedev.name,
>                                                capspeed->link_speed);
> -free_exit:
> -    g_free(atsdreg);

Like was done for this equivalent usage.  Thanks,

Alex