PNPACPI: add bus number support

Add support for bus number resources.  This is for bridges with a range of
bus numbers behind them.  Previously, PNP ignored bus number resources.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
index 0d7d61da63fc..54514aa35b09 100644
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -265,6 +265,14 @@ static void pnpacpi_parse_allocated_memresource(struct pnp_dev *dev,
         pnp_add_mem_resource(dev, start, end, flags);
 }
 
+static void pnpacpi_parse_allocated_busresource(struct pnp_dev *dev,
+                                                u64 start, u64 len)
+{
+        u64 end = start + len - 1;
+
+        pnp_add_bus_resource(dev, start, end);
+}
+
 static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
                                                   struct acpi_resource *res)
 {
@@ -290,6 +298,9 @@ static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
                         p->minimum, p->address_length,
                         p->granularity == 0xfff ? ACPI_DECODE_10 :
                                 ACPI_DECODE_16, window);
+        else if (p->resource_type == ACPI_BUS_NUMBER_RANGE)
+                pnpacpi_parse_allocated_busresource(dev, p->minimum,
+                                                    p->address_length);
 }
 
 static void pnpacpi_parse_allocated_ext_address_space(struct pnp_dev *dev,
@@ -309,6 +320,9 @@ static void pnpacpi_parse_allocated_ext_address_space(struct pnp_dev *dev,
                         p->minimum, p->address_length,
                         p->granularity == 0xfff ? ACPI_DECODE_10 :
                                 ACPI_DECODE_16, window);
+        else if (p->resource_type == ACPI_BUS_NUMBER_RANGE)
+                pnpacpi_parse_allocated_busresource(dev, p->minimum,
+                                                    p->address_length);
 }
 
 static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,