1 files changed, 4 insertions, 22 deletions

diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
index 35bb44af49b3..100e4d9372f1 100644
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -274,26 +274,6 @@ static void pnpacpi_parse_allocated_busresource(struct pnp_dev *dev,
         pnp_add_bus_resource(dev, start, end);
 }
 
-static u64 addr_space_length(struct pnp_dev *dev, u64 min, u64 max, u64 len)
-{
-        u64 max_len;
-
-        max_len = max - min + 1;
-        if (len <= max_len)
-                return len;
-
-        /*
-         * Per 6.4.3.5, _LEN cannot exceed _MAX - _MIN + 1, but some BIOSes
-         * don't do this correctly, e.g.,
-         * https://bugzilla.kernel.org/show_bug.cgi?id=15480
-         */
-        dev_info(&dev->dev,
-                 "resource length %#llx doesn't fit in %#llx-%#llx, trimming\n",
-                 (unsigned long long) len, (unsigned long long) min,
-                 (unsigned long long) max);
-        return max_len;
-}
-
 static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
                                                   struct acpi_resource *res)
 {
@@ -309,7 +289,8 @@ static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
                 return;
         }
 
-        len = addr_space_length(dev, p->minimum, p->maximum, p->address_length);
+        /* Windows apparently computes length rather than using _LEN */
+        len = p->maximum - p->minimum + 1;
         window = (p->producer_consumer == ACPI_PRODUCER) ? 1 : 0;
 
         if (p->resource_type == ACPI_MEMORY_RANGE)
@@ -330,7 +311,8 @@ static void pnpacpi_parse_allocated_ext_address_space(struct pnp_dev *dev,
         int window;
         u64 len;
 
-        len = addr_space_length(dev, p->minimum, p->maximum, p->address_length);
+        /* Windows apparently computes length rather than using _LEN */
+        len = p->maximum - p->minimum + 1;
         window = (p->producer_consumer == ACPI_PRODUCER) ? 1 : 0;
 
         if (p->resource_type == ACPI_MEMORY_RANGE)