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[PATCH] PNPACPI: support shareable interrupts

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ACPI supplies a "shareable" indication, but PNPACPI ignores it.  If a PNP
device uses a shared interrupt, request_irq() fails because the PNP driver
can't tell whether to supply SA_SHIRQ.

This patch allows PNP drivers to test
    (pnp_irq_flags(dev, 0) & IORESOURCE_IRQ_SHAREABLE)

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Adam Belay <ambx1@neo.rr.com>
Cc: Matthieu Castet <castet.matthieu@free.fr>
Cc: Li Shaohua <shaohua.li@intel.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Bjorn Helgaas 2006-07-03 00:24:10 -07:00 committed by Linus Torvalds
parent c61a8416ed
commit c32928c579
2 changed files with 9 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/pnp/pnpacpi/rsparser.c
View File

@ -74,7 +74,7 @@ static void decode_irq_flags(int flag, int *triggering, int *polarity)
static void
pnpacpi_parse_allocated_irqresource(struct pnp_resource_table *res, u32 gsi,
int triggering, int polarity)
int triggering, int polarity, int shareable)
{
int i = 0;
int irq;
@ -95,6 +95,9 @@ pnpacpi_parse_allocated_irqresource(struct pnp_resource_table *res, u32 gsi,
return;
}
if (shareable)
res->irq_resource[i].flags |= IORESOURCE_IRQ_SHAREABLE;
res->irq_resource[i].start = irq;
res->irq_resource[i].end = irq;
pcibios_penalize_isa_irq(irq, 1);
@ -194,7 +197,8 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
pnpacpi_parse_allocated_irqresource(res_table,
res->data.irq.interrupts[i],
res->data.irq.triggering,
res->data.irq.polarity);
res->data.irq.polarity,
res->data.irq.sharable);
}
break;
@ -255,7 +259,8 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
pnpacpi_parse_allocated_irqresource(res_table,
res->data.extended_irq.interrupts[i],
res->data.extended_irq.triggering,
res->data.extended_irq.polarity);
res->data.extended_irq.polarity,
res->data.extended_irq.sharable);
}
break;

1
include/linux/ioport.h
View File

@ -55,6 +55,7 @@ struct resource_list {
#define IORESOURCE_IRQ_LOWEDGE (1<<1)
#define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
#define IORESOURCE_IRQ_LOWLEVEL (1<<3)
#define IORESOURCE_IRQ_SHAREABLE (1<<4)
/* ISA PnP DMA specific bits (IORESOURCE_BITS) */
#define IORESOURCE_DMA_TYPE_MASK (3<<0)