On Fri, Oct 26, 2012 at 3:01 AM, Cyberman Wu <cypher.w@xxxxxxxxx> wrote: > We're not using 3.6.x, we're using is from MDE-4.1.0 from Tilera and > it patch 3.0.38. That's fine, but you sent the email to the linux-pci and linux-kernel lists, and on those lists, we're only concerned with the upstream Linux kernels, e.g., 3.6. If you need support for MDE-4.1.0, you need to talk to whoever supplies that, because we have no idea what it is. > For mvsas, it seems do think 0 I/O address invalied. That's a driver bug. Zero is a perfectly valid I/O address. On many systems it's not usable because of platform restrictions, but the driver has no way to know about those restrictions, and the driver should still work on the platforms where zero *is* usable. > When we using MDE-4.0.0 it don't support I/O space, I just bypass > these check since after > investigate all code of mvsas it seems that I/O space map to BAR 2 is > not really used. If the driver doesn't need I/O space, it'd be a lot simpler to just change it to use pci_enable_device_mem(), which indicates that we don't need to enable I/O BARs, and strip out the code that checks whether the I/O BARs are valid. Then you wouldn't need to mess with adding I/O space support in your platform. Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
