Re: [PATCH] hw/virtio/virtio-pci: Avoid compiler warning with -Wshadow

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, Oct 04, 2023 at 09:55:36AM +0200, Thomas Huth wrote:
> "len" is used as parameter of the function virtio_write_config()
> and as a local variable, so this causes a compiler warning
> when compiling with "-Wshadow" and can be confusing for the reader.
> Rename the local variable to "caplen" to avoid this problem.
> 
> Signed-off-by: Thomas Huth <thuth@redhat.com>

ok sure

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>

feel free to merge with rest of -Wshadow things.

> ---
>  hw/virtio/virtio-pci.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
> index edbc0daa18..d0ef1edd66 100644
> --- a/hw/virtio/virtio-pci.c
> +++ b/hw/virtio/virtio-pci.c
> @@ -780,15 +780,15 @@ static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
>                                                                    pci_cfg_data),
>                         sizeof cfg->pci_cfg_data)) {
>          uint32_t off;
> -        uint32_t len;
> +        uint32_t caplen;
>  
>          cfg = (void *)(proxy->pci_dev.config + proxy->config_cap);
>          off = le32_to_cpu(cfg->cap.offset);
> -        len = le32_to_cpu(cfg->cap.length);
> +        caplen = le32_to_cpu(cfg->cap.length);
>  
> -        if (len == 1 || len == 2 || len == 4) {
> -            assert(len <= sizeof cfg->pci_cfg_data);
> -            virtio_address_space_write(proxy, off, cfg->pci_cfg_data, len);
> +        if (caplen == 1 || caplen == 2 || caplen == 4) {
> +            assert(caplen <= sizeof cfg->pci_cfg_data);
> +            virtio_address_space_write(proxy, off, cfg->pci_cfg_data, caplen);
>          }
>      }
>  }
> -- 
> 2.41.0