Re: [PATCH 1/8] hw/mem/cxl_type3: Improve error handling in realize()

[Ira Weiny <ira.weiny@intel.com>]

On Wed, Jan 11, 2023 at 02:24:33PM +0000, Jonathan Cameron wrote:
> msix_init_exclusive_bar() can fail, so if it does cleanup the address space.
> 
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Reviewed-by: Ira Weiny <ira.weiny@intel.com>

> ---
>  hw/mem/cxl_type3.c | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c
> index dae4fd89ca..252822bd82 100644
> --- a/hw/mem/cxl_type3.c
> +++ b/hw/mem/cxl_type3.c
> @@ -401,7 +401,7 @@ static void ct3_realize(PCIDevice *pci_dev, Error **errp)
>      MemoryRegion *mr = &regs->component_registers;
>      uint8_t *pci_conf = pci_dev->config;
>      unsigned short msix_num = 1;
> -    int i;
> +    int i, rc;
>  
>      if (!cxl_setup_memory(ct3d, errp)) {
>          return;
> @@ -438,7 +438,10 @@ static void ct3_realize(PCIDevice *pci_dev, Error **errp)
>                       &ct3d->cxl_dstate.device_registers);
>  
>      /* MSI(-X) Initailization */
> -    msix_init_exclusive_bar(pci_dev, msix_num, 4, NULL);
> +    rc = msix_init_exclusive_bar(pci_dev, msix_num, 4, NULL);
> +    if (rc) {
> +        goto err_address_space_free;
> +    }
>      for (i = 0; i < msix_num; i++) {
>          msix_vector_use(pci_dev, i);
>      }
> @@ -450,6 +453,11 @@ static void ct3_realize(PCIDevice *pci_dev, Error **errp)
>      cxl_cstate->cdat.free_cdat_table = ct3_free_cdat_table;
>      cxl_cstate->cdat.private = ct3d;
>      cxl_doe_cdat_init(cxl_cstate, errp);
> +    return;
> +
> +err_address_space_free:
> +    address_space_destroy(&ct3d->hostmem_as);
> +    return;
>  }
>  
>  static void ct3_exit(PCIDevice *pci_dev)
> -- 
> 2.37.2
>