[PATCH] int10: fix pci_device_read_rom usage

[Dave Airlie]

On Thu, Aug 30, 2012 at 4:03 AM, Julien Cristau <jcristau at debian.org> wrote:
> From: Stephan Schreiber <info at fs-driver.org>
>
> I noticed that the build-in int10 driver always reports
> "Unable to retrieve all of segment 0x0C0000."
> even though the entire BIOS data is retrieved with success.
>
> The associated code is in hw/xfree86/int10/generic.c, in the function
> xf86ExtendedInitInt10():
>
>     if (pci_device_read_rom(pInt->dev, vbiosMem) < V_BIOS_SIZE) {
>         xf86DrvMsg(screen, X_WARNING,
>                    "Unable to retrieve all of segment 0x0C0000.\n");
>     }
>
> The function pci_device_read_rom() is from libpciaccess; its return
> value is not a size but an error status code: 0 means success.
> If pci_device_read_rom() returns 0 for success, the warning is generated.
>
> The proposed patch corrects the evaluation of the return value of
> pci_device_read_rom() and of the supplied BIOS size.
>
> Debian bug#686153
>
> Signed-off-by: Julien Cristau <jcristau at debian.org>

Reviewed-by: Dave Airlie <airlied at redhat.com>
> ---
>  hw/xfree86/int10/generic.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/hw/xfree86/int10/generic.c b/hw/xfree86/int10/generic.c
> index 4633120..d7594de 100644
> --- a/hw/xfree86/int10/generic.c
> +++ b/hw/xfree86/int10/generic.c
> @@ -178,7 +178,8 @@ xf86ExtendedInitInt10(int entityIndex, int Flags)
>       */
>      vbiosMem = (char *) base + V_BIOS;
>      memset(vbiosMem, 0, 2 * V_BIOS_SIZE);
> -    if (pci_device_read_rom(pInt->dev, vbiosMem) < V_BIOS_SIZE) {
> +    if (pci_device_read_rom(pInt->dev, vbiosMem) != 0
> +        || pInt->dev->rom_size < V_BIOS_SIZE) {
>          xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
>                     "Unable to retrieve all of segment 0x0C0000.\n");
>      }
> --
> 1.7.10.4
>
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