ATA_GET_STATUS ioctl crashes on AHCI devices

[Stanislav Semakin <Stanislav.Semakin@xxxxxxxxxxx>]

Hi,

I use 2.6.21 kernel. If I call the ATA_GET_STATUS to the disks connected
to ahci card then my app crashes.

ata_check_status() function does ioread8(ap->ioaddr.status_addr) where
ap->ioaddr.status_addr is 0.

If I change it in the following way everything works:
u8 ata_check_status(struct ata_port *ap)
{
        if (ap->ops->check_status)
                return ap->ops->check_status(ap);

        return ioread8(ap->ioaddr.status_addr);
}

I checked latest 2.6.23.1 and looks like there is the same problem.


BR,
Stanislav


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