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Commit 357518fa authored by Anton Blanchard's avatar Anton Blanchard Committed by Paul Mackerras
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[POWERPC] pcibus_to_node fixes 



of_node_to_nid returns -1 if the associativity cannot be found. This
means pcibus_to_cpumask has to be careful not to pass a negative index into
node_to_cpumask.

Since pcibus_to_node could be used a lot, and of_node_to_nid is slow (it
walks a list doing strcmps), lets also cache the node in the
pci_controller struct.

Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent f2b09c81

arch/powerpc/kernel/pci_64.c

+12 −1
Original line number Diff line number Diff line
@@ -227,8 +227,10 @@ struct pci_controller * pcibios_alloc_controller(struct device_node *dev) 
	pci_setup_pci_controller(phb);

	phb->arch_data = dev;

	phb->is_dynamic = mem_init_done;

	if (dev)

	if (dev) {

		PHB_SET_NODE(phb, of_node_to_nid(dev));

		add_linux_pci_domain(dev, phb);

	}

	return phb;

}
@@ -1415,3 +1417,12 @@ long sys_pciconfig_iobase(long which, unsigned long in_bus, 


	return -EOPNOTSUPP;

}



#ifdef CONFIG_NUMA

int pcibus_to_node(struct pci_bus *bus)

{

	struct pci_controller *phb = pci_bus_to_host(bus);

	return phb->node;

}

EXPORT_SYMBOL(pcibus_to_node);

#endif

include/asm-powerpc/pci-bridge.h

+8 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 
#include <asm-ppc/pci-bridge.h>

#else



#include <linux/config.h>

#include <linux/pci.h>

#include <linux/list.h>
@@ -22,6 +23,7 @@ 
struct pci_controller {

	struct pci_bus *bus;

	char is_dynamic;

	int node;

	void *arch_data;

	struct list_head list_node;
@@ -165,6 +167,12 @@ static inline unsigned long pci_address_to_pio(phys_addr_t address) 
#define PCI_PROBE_NORMAL	0	/* Do normal PCI probing */

#define PCI_PROBE_DEVTREE	1	/* Instantiate from device tree */



#ifdef CONFIG_NUMA

#define PHB_SET_NODE(PHB, NODE)		((PHB)->node = (NODE))

#else

#define PHB_SET_NODE(PHB, NODE)		((PHB)->node = -1)

#endif



#endif /* CONFIG_PPC64 */

#endif /* __KERNEL__ */

#endif

include/asm-powerpc/topology.h

+7 −7
Original line number Diff line number Diff line
@@ -32,13 +32,13 @@ static inline int node_to_first_cpu(int node) 


int of_node_to_nid(struct device_node *device);



#ifdef CONFIG_PPC64

#define pcibus_to_node(bus)	(of_node_to_nid(bus->sysdata))

#define pcibus_to_cpumask(bus)	(node_to_cpumask(of_node_to_nid(bus->sysdata)))

#else

#define pcibus_to_node(node)    (-1)

#define pcibus_to_cpumask(bus)	(cpu_online_map)

#endif

struct pci_bus;

extern int pcibus_to_node(struct pci_bus *bus);



#define pcibus_to_cpumask(bus)	(pcibus_to_node(bus) == -1 ? \

					CPU_MASK_ALL : \

					node_to_cpumask(pcibus_to_node(bus)) \

				)



/* sched_domains SD_NODE_INIT for PPC64 machines */

#define SD_NODE_INIT (struct sched_domain) {		\