[libvirt] [PATCH] hostdev: display leading zeros of USB vendor/product id's in error messages

[John Ferlan]

On 07/28/2017 04:33 AM, Chen Hanxiao wrote:
> From: Chen Hanxiao <chenhanxiao at gmail.com>
> 
>     Many vendor id's and product id's have leading zeros.
>     Show them in error messages.
> 
> Signed-off-by: Chen Hanxiao <chenhanxiao at gmail.com>
> ---
>  src/util/virhostdev.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 

Looking at some other examples...

    if (usbsrc->vendor) {
        virBufferAsprintf(buf, "<vendor id='0x%.4x'/>\n", usbsrc->vendor);
        virBufferAsprintf(buf, "<product id='0x%.4x'/>\n", usbsrc->product);

and

    if (usbdev->vendor >= 0)
        virBufferAsprintf(buf, " vendor='0x%04X'", usbdev->vendor);

    if (usbdev->product >= 0)
        virBufferAsprintf(buf, " product='0x%04X'", usbdev->product);

Perhaps the best thing to do is be consistent with all of them...  Could
take a bit of searching, but cscope's egrep is pretty good w/
"vendor.*%.*x" (and X).

There's also a usage in libxl_conf, where "%x:%x" is used. So it may be
best to find all possible print's of vendor and make them all consistent.

John

> diff --git a/src/util/virhostdev.c b/src/util/virhostdev.c
> index 579563c..0e6b5a3 100644
> --- a/src/util/virhostdev.c
> +++ b/src/util/virhostdev.c
> @@ -1390,7 +1390,7 @@ virHostdevFindUSBDevice(virDomainHostdevDefPtr hostdev,
>          } else if (!autoAddress) {
>              goto out;
>          } else {
> -            VIR_INFO("USB device %x:%x could not be found at previous"
> +            VIR_INFO("USB device %04x:%04x could not be found at previous"
>                       " address (bus:%u device:%u)",
>                       vendor, product, bus, device);
>          }
> @@ -1418,12 +1418,12 @@ virHostdevFindUSBDevice(virDomainHostdevDefPtr hostdev,
>          } else if (rc > 1) {
>              if (autoAddress) {
>                  virReportError(VIR_ERR_OPERATION_FAILED,
> -                               _("Multiple USB devices for %x:%x were found,"
> +                               _("Multiple USB devices for %04x:%04x were found,"
>                                   " but none of them is at bus:%u device:%u"),
>                                 vendor, product, bus, device);
>              } else {
>                  virReportError(VIR_ERR_OPERATION_FAILED,
> -                               _("Multiple USB devices for %x:%x, "
> +                               _("Multiple USB devices for %04x:%04x, "
>                                   "use <address> to specify one"),
>                                 vendor, product);
>              }
> @@ -1435,7 +1435,7 @@ virHostdevFindUSBDevice(virDomainHostdevDefPtr hostdev,
>          usbsrc->autoAddress = true;
>  
>          if (autoAddress) {
> -            VIR_INFO("USB device %x:%x found at bus:%u device:%u (moved"
> +            VIR_INFO("USB device %04x:%04x found at bus:%u device:%u (moved"
>                       " from bus:%u device:%u)",
>                       vendor, product,
>                       usbsrc->bus, usbsrc->device,
>