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path: root/drivers/pnp/pnpacpi/rsparser.c
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Diffstat (limited to 'drivers/pnp/pnpacpi/rsparser.c')
-rw-r--r--drivers/pnp/pnpacpi/rsparser.c70
1 files changed, 52 insertions, 18 deletions
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
index 9a45c25b46d2..595252b65205 100644
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -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;