On Mon, 12 Oct 2015 13:31:09 -0500
Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx> wrote:
Hi Suravee,
> [RESEND] Not sure if the email went out the first time.
>
> Hi Marc,
>
> On 10/6/15 12:36, Marc Zyngier wrote:
> > So far, our irq domains are still looked up by device node.
> > Let's change this and allow a domain to be looked up using
> > a fwnode_handle pointer.
> >
> > The existing interfaces are preserved with a couple of helpers.
> >
> > Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
> > ---
> > include/linux/irqdomain.h | 11 +++++++++--
> > kernel/irq/irqdomain.c | 14 ++++++--------
> > 2 files changed, 15 insertions(+), 10 deletions(-)
> >
> > diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
> > index 2f508f4..607c185 100644
> > --- a/include/linux/irqdomain.h
> > +++ b/include/linux/irqdomain.h
> > @@ -183,10 +183,17 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
> > irq_hw_number_t first_hwirq,
> > const struct irq_domain_ops *ops,
> > void *host_data);
> > -extern struct irq_domain *irq_find_matching_host(struct device_node *node,
> > - enum irq_domain_bus_token bus_token);
> > +extern struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode,
> > + enum irq_domain_bus_token bus_token);
> > extern void irq_set_default_host(struct irq_domain *host);
> >
> > +static inline struct irq_domain *irq_find_matching_host(struct device_node *node,
> > + enum irq_domain_bus_token bus_token)
> > +{
> > + return irq_find_matching_fwnode(node ? &node->fwnode : NULL,
> > + bus_token);
> > +}
> > +
> > static inline struct irq_domain *irq_find_host(struct device_node *node)
> > {
> > return irq_find_matching_host(node, DOMAIN_BUS_ANY);
> > diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
> > index 1aee5c1..10b6105 100644
> > --- a/kernel/irq/irqdomain.c
> > +++ b/kernel/irq/irqdomain.c
> > @@ -191,12 +191,12 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
> > EXPORT_SYMBOL_GPL(irq_domain_add_legacy);
> >
> > /**
> > - * irq_find_matching_host() - Locates a domain for a given device node
> > - * @node: device-tree node of the interrupt controller
> > + * irq_find_matching_fwnode() - Locates a domain for a given fwnode
> > + * @fwnode: FW descriptor of the interrupt controller
> > * @bus_token: domain-specific data
> > */
> > -struct irq_domain *irq_find_matching_host(struct device_node *node,
> > - enum irq_domain_bus_token bus_token)
> > +struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode,
> > + enum irq_domain_bus_token bus_token)
> > {
> > struct irq_domain *h, *found = NULL;
> > int rc;
> > @@ -212,12 +212,10 @@ struct irq_domain *irq_find_matching_host(struct device_node *node,
> > */
> > mutex_lock(&irq_domain_mutex);
> > list_for_each_entry(h, &irq_domain_list, link) {
> > - struct device_node *of_node;
> > - of_node = irq_domain_get_of_node(h);
> > if (h->ops->match)
> > - rc = h->ops->match(h, node, bus_token);
> > + rc = h->ops->match(h, to_of_node(fwnode), bus_token);
> > else
> > - rc = ((of_node != NULL) && (of_node == node) &&
> > + rc = ((fwnode != NULL) && (h->fwnode == fwnode) &&
> > ((bus_token == DOMAIN_BUS_ANY) ||
> > (h->bus_token == bus_token)));
> >
> >
>
> In the kernel/irq/irq_domain.c, shouldn't you also change the export
> symbol from:
>
> EXPORT_SYMBOL_GPL(irq_find_matching_host);
>
> to:
>
> EXPORT_SYMBOL_GPL(irq_find_matching_fwnode);
>
> at the end of this function as well?
Well spotted! I'll update the v2 branch.
Thanks,
M.
--
Jazz is not dead. It just smells funny.
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