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ACPI,PCI,IRQ: reduce static IRQ array size to 16

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Now that the supported number of PCI IRQs are no longer capped
with 256, renaming the static array to support ISA IRQs only
and removing the MAX_IRQS constant.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Sinan Kaya 2016-04-17 13:36:54 -04:00 committed by Rafael J. Wysocki
parent 103544d869
commit 5c5087a553
1 changed files with 20 additions and 20 deletions
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40
drivers/acpi/pci_link.c
View file

@ -438,8 +438,7 @@ static int acpi_pci_link_set(struct acpi_pci_link *link, int irq)
* enabled system.
*/
#define ACPI_MAX_IRQS 256
#define ACPI_MAX_ISA_IRQ 16
#define ACPI_MAX_ISA_IRQS 16
#define PIRQ_PENALTY_PCI_POSSIBLE (16*16)
#define PIRQ_PENALTY_PCI_USING (16*16*16)
@ -447,7 +446,7 @@ static int acpi_pci_link_set(struct acpi_pci_link *link, int irq)
#define PIRQ_PENALTY_ISA_USED (16*16*16*16*16)
#define PIRQ_PENALTY_ISA_ALWAYS (16*16*16*16*16*16)
static int acpi_irq_penalty[ACPI_MAX_IRQS] = {
static int acpi_isa_irq_penalty[ACPI_MAX_ISA_IRQS] = {
PIRQ_PENALTY_ISA_ALWAYS, /* IRQ0 timer */
PIRQ_PENALTY_ISA_ALWAYS, /* IRQ1 keyboard */
PIRQ_PENALTY_ISA_ALWAYS, /* IRQ2 cascade */
@ -500,8 +499,8 @@ static int acpi_irq_get_penalty(int irq)
{
int penalty = 0;
if (irq < ACPI_MAX_ISA_IRQ)
penalty += acpi_irq_penalty[irq];
if (irq < ACPI_MAX_ISA_IRQS)
penalty += acpi_isa_irq_penalty[irq];
/*
* Penalize IRQ used by ACPI SCI. If ACPI SCI pin attributes conflict
@ -541,14 +540,15 @@ int __init acpi_irq_penalty_init(void)
link->irq.possible_count;
for (i = 0; i < link->irq.possible_count; i++) {
if (link->irq.possible[i] < ACPI_MAX_ISA_IRQ)
acpi_irq_penalty[link->irq.
if (link->irq.possible[i] < ACPI_MAX_ISA_IRQS)
acpi_isa_irq_penalty[link->irq.
possible[i]] +=
penalty;
}
} else if (link->irq.active) {
acpi_irq_penalty[link->irq.active] +=
} else if (link->irq.active &&
(link->irq.active < ACPI_MAX_ISA_IRQS)) {
acpi_isa_irq_penalty[link->irq.active] +=
PIRQ_PENALTY_PCI_POSSIBLE;
}
}
@ -831,7 +831,7 @@ static void acpi_pci_link_remove(struct acpi_device *device)
}
/*
* modify acpi_irq_penalty[] from cmdline
* modify acpi_isa_irq_penalty[] from cmdline
*/
static int __init acpi_irq_penalty_update(char *str, int used)
{
@ -840,24 +840,24 @@ static int __init acpi_irq_penalty_update(char *str, int used)
for (i = 0; i < 16; i++) {
int retval;
int irq;
int new_penalty;
retval = get_option(&str, &irq);
if (!retval)
break; /* no number found */
if (irq < 0)
continue;
if (irq >= ARRAY_SIZE(acpi_irq_penalty))
/* see if this is a ISA IRQ */
if ((irq < 0) || (irq >= ACPI_MAX_ISA_IRQS))
continue;
if (used)
acpi_irq_penalty[irq] = acpi_irq_get_penalty(irq) +
PIRQ_PENALTY_ISA_USED;
new_penalty = acpi_irq_get_penalty(irq) +
PIRQ_PENALTY_ISA_USED;
else
acpi_irq_penalty[irq] = 0;
new_penalty = 0;
acpi_isa_irq_penalty[irq] = new_penalty;
if (retval != 2) /* no next number */
break;
}
@ -873,14 +873,14 @@ static int __init acpi_irq_penalty_update(char *str, int used)
*/
void acpi_penalize_isa_irq(int irq, int active)
{
if (irq >= 0 && irq < ARRAY_SIZE(acpi_irq_penalty))
acpi_irq_penalty[irq] = acpi_irq_get_penalty(irq) +
if ((irq >= 0) && (irq < ARRAY_SIZE(acpi_isa_irq_penalty)))
acpi_isa_irq_penalty[irq] = acpi_irq_get_penalty(irq) +
active ? PIRQ_PENALTY_ISA_USED : PIRQ_PENALTY_PCI_USING;
}
bool acpi_isa_irq_available(int irq)
{
return irq >= 0 && (irq >= ARRAY_SIZE(acpi_irq_penalty) ||
return irq >= 0 && (irq >= ARRAY_SIZE(acpi_isa_irq_penalty) ||
acpi_irq_get_penalty(irq) < PIRQ_PENALTY_ISA_ALWAYS);
}