[SeaBIOS] [PATCH] provide correct pci routing information in mptable

[Kevin O'Connor]

Thanks Gleb.

On Wed, Dec 23, 2009 at 05:29:25PM +0200, Gleb Natapov wrote:
> -                  + sizeof(struct mpt_intsrc) * 18);
> +                  + sizeof(struct mpt_intsrc) * 34);
[...]
> +    foreachpci(bdf, max) {
> +        int pin = pci_config_readb(bdf, PCI_INTERRUPT_PIN);
> +        int irq = pci_config_readb(bdf, PCI_INTERRUPT_LINE);
> +        if (pin == 0)
> +        	continue;
> +        mask |= (1 << irq);
> +        memset(intsrc, 0, sizeof(*intsrc));
> +        intsrc->type = MPT_TYPE_INTSRC;
> +        intsrc->irqtype = 0; /* INT */
> +        intsrc->irqflag = 1; /* active high */
> +        intsrc->srcbus = 0; /* PCI bus */
> +        intsrc->srcbusirq = (pci_bdf_to_dev(bdf) << 2) | (pin - 1);
> +        intsrc->dstapic = ioapic_id;
> +        intsrc->dstirq = irq;
> +        intsrc++;
> +    }

Why only increase the allocated storage for intsrc by 16?  The loop
above seems like it could add a large number of entries.

Also, the foreachpci() macro will iterate over every PCI function -
there could be 8 functions to a pci device which could lead to
duplicates in the table (two pci functions on the same device could
use the same irq pin).

-Kevin