[Xen-devel] Re: [PATCH] cirrus_vga: reset lfb_addr after a pci config write if the BAR is unmapped

[Alexander Graf <agraf@xxxxxxx>]

On 06/03/2011 05:56 PM, stefano.stabellini@xxxxxxxxxxxxx wrote:
> From: Stefano Stabellini<stefano.stabellini@xxxxxxxxxxxxx>
>
> If the cirrus_vga PCI BAR is unmapped than we should not only reset
> map_addr but also lfb_addr, otherwise we'll keep trying to map
> the old lfb_addr in map_linear_vram.
The patch looks good to me, but I'd love to get an ack from someone who 
knows the cirrus code before committing it.

Alex

> Signed-off-by: Stefano Stabellini<stefano.stabellini@xxxxxxxxxxxxx>
> ---
>   hw/cirrus_vga.c |    5 ++++-
>   1 files changed, 4 insertions(+), 1 deletions(-)
>
> diff --git a/hw/cirrus_vga.c b/hw/cirrus_vga.c
> index 722cac7..3c5043e 100644
> --- a/hw/cirrus_vga.c
> +++ b/hw/cirrus_vga.c
> @@ -3088,8 +3088,11 @@ static void pci_cirrus_write_config(PCIDevice *d,
>       CirrusVGAState *s =&pvs->cirrus_vga;
>
>       pci_default_write_config(d, address, val, len);
> -    if (s->vga.map_addr&&  d->io_regions[0].addr == PCI_BAR_UNMAPPED)
> +    if (s->vga.map_addr&&  d->io_regions[0].addr == PCI_BAR_UNMAPPED) {
>           s->vga.map_addr = 0;
> +        s->vga.lfb_addr = 0;
> +        s->vga.lfb_end = 0;
> +    }
>       cirrus_update_memory_access(s);
>   }

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