On Wed, 2012-03-14 at 09:53 +0800, Gavin Shan wrote: > > +#if defined(CONFIG_EEH) > > > +static inline struct eeh_dev *of_node_to_eeh_dev(struct device_node *dn) > > > +{ > > > + return dn->edev; > > > +} > > > +#endif > > > > Ben, What is this? I don't want the eeh_dev pointer in struct device_node. Up to > > now we've avoided putting any reverse references into device_nodes. For everything > > else we use a reverse lookup, particularly for devices, to avoid growing the > > device_node for each new type of lookup. > > > > It's used to trace the EEH device. When EEH (Enhanced Error Hanlding) is enabled, > EEH device will be created against PCI sensitive OF node to trace the EEH state > accordingly. Since you don't want see this in struct device_node, we have to change > struct eeh_dev for a little bit to so that all struct eeh_dev instances will form > a global list and we can search eeh_dev according to the given device_node through > the global list. > > I don't know the policy or rule here for much. I think we can have 2 options. > > 1. Keep the code as being, and fix it later. > 2. Fix it now. My bad, it's a mis-review, I thought it was still in pci_dn, I din't catch Gavin moving it to device-node. Yes, Gavin, we need to do something else, a chained list we walk or something like that. For the "fast path" which is when we have a pci_dev around, we can either add it to dev_archdata or hijack the pci-dev platform_data (I don't think anything uses it, Grant, do you know of anything ?) The patches are already in -next and I won't rebase, so we need to fix it on top of the existing patches. Gavin, can you make a patch that puts it back into pci_dn to begin with, then we can contemplate what better long term solution we have ? Cheers, Ben. -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html