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irqdomain bug fixes for v3.4-rc3 

This branch fixes a bug in irq_create_mapping() where an error return
 from irq_alloc_desc_from() gets ignored.  It also removes irq_virq_count
 to fix a bug on powerpc where the irqdomain code does not find irqs
 allocated above the CONFIG_NR_IRQS boundary.  The remaining patches get
 rid of an completely pointless export and fix some minor bugs in the
 irqdomain debug output.
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Merge tag 'irqdomain-for-linus' of git://git.secretlab.ca/git/linux-2.6

Pull irqdomain bug fixes from Grant Likely:
 "This branch fixes a bug in irq_create_mapping() where an error return
  from irq_alloc_desc_from() gets ignored.

  It also removes irq_virq_count to fix a bug on powerpc where the
  irqdomain code does not find irqs allocated above the CONFIG_NR_IRQS
  boundary.

  The remaining patches get rid of an completely pointless export and
  fix some minor bugs in the irqdomain debug output."

* tag 'irqdomain-for-linus' of git://git.secretlab.ca/git/linux-2.6:
  irq_domain: Move irq_virq_count into NOMAP revmap
  irqdomain: Fix debugfs formatting
  irq_domain: correct the debugfs file name
  irq: Kill pointless irqd_to_hw export
  irq/irq_domain: Quit ignoring error returns from irq_alloc_desc_from().
This commit is contained in:
Linus Torvalds 2012-04-12 12:49:56 -07:00
parent 4abb663b64 6fa6c8e25e
commit 7e06648972
13 changed files with 36 additions and 69 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/c6x/include/asm/irq.h
View File

@ -42,10 +42,6 @@
/* This number is used when no interrupt has been assigned */
#define NO_IRQ 0
struct irq_data;
extern irq_hw_number_t irqd_to_hwirq(struct irq_data *d);
extern irq_hw_number_t virq_to_hw(unsigned int virq);
extern void __init init_pic_c64xplus(void);
extern void init_IRQ(void);

13
arch/c6x/kernel/irq.c
View File

@ -130,16 +130,3 @@ int arch_show_interrupts(struct seq_file *p, int prec)
seq_printf(p, "%*s: %10lu\n", prec, "Err", irq_err_count);
return 0;
}
irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
{
return d->hwirq;
}
EXPORT_SYMBOL_GPL(irqd_to_hwirq);
irq_hw_number_t virq_to_hw(unsigned int virq)
{
struct irq_data *irq_data = irq_get_irq_data(virq);
return WARN_ON(!irq_data) ? 0 : irq_data->hwirq;
}
EXPORT_SYMBOL_GPL(virq_to_hw);

2
arch/powerpc/include/asm/irq.h
View File

@ -33,8 +33,6 @@ extern atomic_t ppc_n_lost_interrupts;
/* Same thing, used by the generic IRQ code */
#define NR_IRQS_LEGACY NUM_ISA_INTERRUPTS
struct irq_data;
extern irq_hw_number_t irqd_to_hwirq(struct irq_data *d);
extern irq_hw_number_t virq_to_hw(unsigned int virq);
/**

6
arch/powerpc/kernel/irq.c
View File

@ -560,12 +560,6 @@ void do_softirq(void)
local_irq_restore(flags);
}
irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
{
return d->hwirq;
}
EXPORT_SYMBOL_GPL(irqd_to_hwirq);
irq_hw_number_t virq_to_hw(unsigned int virq)
{
struct irq_data *irq_data = irq_get_irq_data(virq);

2
arch/powerpc/platforms/cell/axon_msi.c
View File

@ -392,7 +392,7 @@ static int axon_msi_probe(struct platform_device *device)
}
memset(msic->fifo_virt, 0xff, MSIC_FIFO_SIZE_BYTES);
msic->irq_domain = irq_domain_add_nomap(dn, &msic_host_ops, msic);
msic->irq_domain = irq_domain_add_nomap(dn, 0, &msic_host_ops, msic);
if (!msic->irq_domain) {
printk(KERN_ERR "axon_msi: couldn't allocate irq_domain for %s\n",
dn->full_name);

2
arch/powerpc/platforms/cell/beat_interrupt.c
View File

@ -239,7 +239,7 @@ void __init beatic_init_IRQ(void)
ppc_md.get_irq = beatic_get_irq;
/* Allocate an irq host */
beatic_host = irq_domain_add_nomap(NULL, &beatic_pic_host_ops, NULL);
beatic_host = irq_domain_add_nomap(NULL, 0, &beatic_pic_host_ops, NULL);
BUG_ON(beatic_host == NULL);
irq_set_default_host(beatic_host);
}

2
arch/powerpc/platforms/powermac/smp.c
View File

@ -192,7 +192,7 @@ static int psurge_secondary_ipi_init(void)
{
int rc = -ENOMEM;
psurge_host = irq_domain_add_nomap(NULL, &psurge_host_ops, NULL);
psurge_host = irq_domain_add_nomap(NULL, 0, &psurge_host_ops, NULL);
if (psurge_host)
psurge_secondary_virq = irq_create_direct_mapping(psurge_host);

3
arch/powerpc/platforms/ps3/interrupt.c
View File

@ -753,9 +753,8 @@ void __init ps3_init_IRQ(void)
unsigned cpu;
struct irq_domain *host;
host = irq_domain_add_nomap(NULL, &ps3_host_ops, NULL);
host = irq_domain_add_nomap(NULL, PS3_PLUG_MAX + 1, &ps3_host_ops, NULL);
irq_set_default_host(host);
irq_set_virq_count(PS3_PLUG_MAX + 1);
for_each_possible_cpu(cpu) {
struct ps3_private *pd = &per_cpu(ps3_private, cpu);

5
include/linux/irq.h
View File

@ -263,6 +263,11 @@ static inline void irqd_clr_chained_irq_inprogress(struct irq_data *d)
d->state_use_accessors &= ~IRQD_IRQ_INPROGRESS;
}
static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
{
return d->hwirq;
}
/**
* struct irq_chip - hardware interrupt chip descriptor
*

12
include/linux/irqdomain.h
View File

@ -42,12 +42,6 @@ struct of_device_id;
/* Number of irqs reserved for a legacy isa controller */
#define NUM_ISA_INTERRUPTS 16
/* This type is the placeholder for a hardware interrupt number. It has to
* be big enough to enclose whatever representation is used by a given
* platform.
*/
typedef unsigned long irq_hw_number_t;
/**
* struct irq_domain_ops - Methods for irq_domain objects
* @match: Match an interrupt controller device node to a host, returns
@ -104,6 +98,9 @@ struct irq_domain {
unsigned int size;
unsigned int *revmap;
} linear;
struct {
unsigned int max_irq;
} nomap;
struct radix_tree_root tree;
} revmap_data;
const struct irq_domain_ops *ops;
@ -126,6 +123,7 @@ struct irq_domain *irq_domain_add_linear(struct device_node *of_node,
const struct irq_domain_ops *ops,
void *host_data);
struct irq_domain *irq_domain_add_nomap(struct device_node *of_node,
unsigned int max_irq,
const struct irq_domain_ops *ops,
void *host_data);
struct irq_domain *irq_domain_add_tree(struct device_node *of_node,
@ -134,7 +132,6 @@ struct irq_domain *irq_domain_add_tree(struct device_node *of_node,
extern struct irq_domain *irq_find_host(struct device_node *node);
extern void irq_set_default_host(struct irq_domain *host);
extern void irq_set_virq_count(unsigned int count);
static inline struct irq_domain *irq_domain_add_legacy_isa(
struct device_node *of_node,
@ -146,7 +143,6 @@ static inline struct irq_domain *irq_domain_add_legacy_isa(
}
extern struct irq_domain *irq_find_host(struct device_node *node);
extern void irq_set_default_host(struct irq_domain *host);
extern void irq_set_virq_count(unsigned int count);
extern unsigned int irq_create_mapping(struct irq_domain *host,

6
include/linux/types.h
View File

@ -210,6 +210,12 @@ typedef u32 phys_addr_t;
typedef phys_addr_t resource_size_t;
/*
* This type is the placeholder for a hardware interrupt number. It has to be
* big enough to enclose whatever representation is used by a given platform.
*/
typedef unsigned long irq_hw_number_t;
typedef struct {
int counter;
} atomic_t;

2
kernel/irq/Kconfig
View File

@ -62,7 +62,7 @@ config IRQ_DOMAIN_DEBUG
help
This option will show the mapping relationship between hardware irq
numbers and Linux irq numbers. The mapping is exposed via debugfs
in the file "virq_mapping".
in the file "irq_domain_mapping".
If you don't know what this means you don't need it.

46
kernel/irq/irqdomain.c
View File

@ -23,7 +23,6 @@ static LIST_HEAD(irq_domain_list);
static DEFINE_MUTEX(irq_domain_mutex);
static DEFINE_MUTEX(revmap_trees_mutex);
static unsigned int irq_virq_count = NR_IRQS;
static struct irq_domain *irq_default_domain;
/**
@ -184,13 +183,16 @@ struct irq_domain *irq_domain_add_linear(struct device_node *of_node,
}
struct irq_domain *irq_domain_add_nomap(struct device_node *of_node,
unsigned int max_irq,
const struct irq_domain_ops *ops,
void *host_data)
{
struct irq_domain *domain = irq_domain_alloc(of_node,
IRQ_DOMAIN_MAP_NOMAP, ops, host_data);
if (domain)
if (domain) {
domain->revmap_data.nomap.max_irq = max_irq ? max_irq : ~0;
irq_domain_add(domain);
}
return domain;
}
@ -262,22 +264,6 @@ void irq_set_default_host(struct irq_domain *domain)
irq_default_domain = domain;
}
/**
* irq_set_virq_count() - Set the maximum number of linux irqs
* @count: number of linux irqs, capped with NR_IRQS
*
* This is mainly for use by platforms like iSeries who want to program
* the virtual irq number in the controller to avoid the reverse mapping
*/
void irq_set_virq_count(unsigned int count)
{
pr_debug("irq: Trying to set virq count to %d\n", count);
BUG_ON(count < NUM_ISA_INTERRUPTS);
if (count < NR_IRQS)
irq_virq_count = count;
}
static int irq_setup_virq(struct irq_domain *domain, unsigned int virq,
irq_hw_number_t hwirq)
{
@ -320,13 +306,12 @@ unsigned int irq_create_direct_mapping(struct irq_domain *domain)
pr_debug("irq: create_direct virq allocation failed\n");
return 0;
}
if (virq >= irq_virq_count) {
if (virq >= domain->revmap_data.nomap.max_irq) {
pr_err("ERROR: no free irqs available below %i maximum\n",
irq_virq_count);
domain->revmap_data.nomap.max_irq);
irq_free_desc(virq);
return 0;
}
pr_debug("irq: create_direct obtained virq %d\n", virq);
if (irq_setup_virq(domain, virq, virq)) {
@ -350,7 +335,8 @@ unsigned int irq_create_direct_mapping(struct irq_domain *domain)
unsigned int irq_create_mapping(struct irq_domain *domain,
irq_hw_number_t hwirq)
{
unsigned int virq, hint;
unsigned int hint;
int virq;
pr_debug("irq: irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq);
@ -377,13 +363,13 @@ unsigned int irq_create_mapping(struct irq_domain *domain,
return irq_domain_legacy_revmap(domain, hwirq);
/* Allocate a virtual interrupt number */
hint = hwirq % irq_virq_count;
hint = hwirq % nr_irqs;
if (hint == 0)
hint++;
virq = irq_alloc_desc_from(hint, 0);
if (!virq)
if (virq <= 0)
virq = irq_alloc_desc_from(1, 0);
if (!virq) {
if (virq <= 0) {
pr_debug("irq: -> virq allocation failed\n");
return 0;
}
@ -515,7 +501,7 @@ unsigned int irq_find_mapping(struct irq_domain *domain,
irq_hw_number_t hwirq)
{
unsigned int i;
unsigned int hint = hwirq % irq_virq_count;
unsigned int hint = hwirq % nr_irqs;
/* Look for default domain if nececssary */
if (domain == NULL)
@ -536,7 +522,7 @@ unsigned int irq_find_mapping(struct irq_domain *domain,
if (data && (data->domain == domain) && (data->hwirq == hwirq))
return i;
i++;
if (i >= irq_virq_count)
if (i >= nr_irqs)
i = 1;
} while(i != hint);
return 0;
@ -642,8 +628,8 @@ static int virq_debug_show(struct seq_file *m, void *private)
void *data;
int i;
seq_printf(m, "%-5s %-7s %-15s %-18s %s\n", "virq", "hwirq",
"chip name", "chip data", "domain name");
seq_printf(m, "%-5s %-7s %-15s %-*s %s\n", "irq", "hwirq",
"chip name", 2 * sizeof(void *) + 2, "chip data", "domain name");
for (i = 1; i < nr_irqs; i++) {
desc = irq_to_desc(i);
@ -666,7 +652,7 @@ static int virq_debug_show(struct seq_file *m, void *private)
seq_printf(m, "%-15s ", p);
data = irq_desc_get_chip_data(desc);
seq_printf(m, "0x%16p ", data);
seq_printf(m, data ? "0x%p " : " %p ", data);
if (desc->irq_data.domain && desc->irq_data.domain->of_node)
p = desc->irq_data.domain->of_node->full_name;