renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-11-20 00:26:39 +08:00
Code

PNPACPI: keep disabled resources when parsing current config

Browse Source 
When we parse a device's _CRS data (the current resource settings),
we should keep track of everything we find, even if it's currently
disabled or invalid.

This is what we already do for ISAPNP and PNPBIOS, and it helps
keep things matched up when we subsequently re-encode resources.
For example, consider a device with (mem, irq0, irq1, io), where
irq0 is disabled.  If we drop irq0 when parsing the _CRS, we will
mistakenly put irq1 in the irq0 slot when we encode resources
for an _SRS call.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
This commit is contained in:
Bjorn Helgaas 2008-06-27 16:56:58 -06:00 committed by Andi Kleen
parent aee3ad815d
commit 5acf914157
1 changed files with 52 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

70
drivers/pnp/pnpacpi/rsparser.c
View File

@ -98,8 +98,10 @@ static void pnpacpi_parse_allocated_irqresource(struct pnp_dev *dev,
int irq, flags;
int p, t;
if (!valid_IRQ(gsi))
if (!valid_IRQ(gsi)) {
pnp_add_irq_resource(dev, gsi, IORESOURCE_DISABLED);
return;
}
/*
* in IO-APIC mode, use overrided attribute. Two reasons:
@ -248,24 +250,39 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
* _CRS, but some firmware violates this, so parse them all.
*/
irq = &res->data.irq;
for (i = 0; i < irq->interrupt_count; i++) {
pnpacpi_parse_allocated_irqresource(dev,
irq->interrupts[i],
irq->triggering,
irq->polarity,
irq->sharable);
if (irq->interrupt_count == 0)
pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
else {
for (i = 0; i < irq->interrupt_count; i++) {
pnpacpi_parse_allocated_irqresource(dev,
irq->interrupts[i],
irq->triggering,
irq->polarity,
irq->sharable);
}
/*
* The IRQ encoder puts a single interrupt in each
* descriptor, so if a _CRS descriptor has more than
* one interrupt, we won't be able to re-encode it.
*/
if (pnp_can_write(dev) && irq->interrupt_count > 1) {
dev_warn(&dev->dev, "multiple interrupts in "
"_CRS descriptor; configuration can't "
"be changed\n");
dev->capabilities &= ~PNP_WRITE;
}
}
break;
case ACPI_RESOURCE_TYPE_DMA:
dma = &res->data.dma;
if (dma->channel_count > 0) {
if (dma->channel_count > 0 && dma->channels[0] != (u8) -1)
flags = dma_flags(dma->type, dma->bus_master,
dma->transfer);
if (dma->channels[0] == (u8) -1)
flags |= IORESOURCE_DISABLED;
pnp_add_dma_resource(dev, dma->channels[0], flags);
}
else
flags = IORESOURCE_DISABLED;
pnp_add_dma_resource(dev, dma->channels[0], flags);
break;
case ACPI_RESOURCE_TYPE_IO:
@ -331,12 +348,29 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
if (extended_irq->producer_consumer == ACPI_PRODUCER)
return AE_OK;
for (i = 0; i < extended_irq->interrupt_count; i++) {
pnpacpi_parse_allocated_irqresource(dev,
extended_irq->interrupts[i],
extended_irq->triggering,
extended_irq->polarity,
extended_irq->sharable);
if (extended_irq->interrupt_count == 0)
pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
else {
for (i = 0; i < extended_irq->interrupt_count; i++) {
pnpacpi_parse_allocated_irqresource(dev,
extended_irq->interrupts[i],
extended_irq->triggering,
extended_irq->polarity,
extended_irq->sharable);
}
/*
* The IRQ encoder puts a single interrupt in each
* descriptor, so if a _CRS descriptor has more than
* one interrupt, we won't be able to re-encode it.
*/
if (pnp_can_write(dev) &&
extended_irq->interrupt_count > 1) {
dev_warn(&dev->dev, "multiple interrupts in "
"_CRS descriptor; configuration can't "
"be changed\n");
dev->capabilities &= ~PNP_WRITE;
}
}
break;