[PATCH] ACPI: Fix an error in IO port range validation

[Liu Jiang]

Signed-off-by: Liu Jiang <jiang.liu@xxxxxxxxxxxxxxx>
---
 drivers/acpi/resource.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 15d22db05054..5bb1daa562b0 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -119,14 +119,14 @@ bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
 EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
 
 static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
-				      u8 io_decode)
+				      u64 offset, u8 io_decode)
 {
 	res->flags = IORESOURCE_IO;
 
 	if (!acpi_dev_resource_len_valid(res->start, res->end, len, true))
 		res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
 
-	if (res->end >= 0x10003)
+	if (res->end - offset >= 0x10003)
 		res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
 
 	if (io_decode == ACPI_DECODE_16)
@@ -138,7 +138,7 @@ static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
 {
 	res->start = start;
 	res->end = start + len - 1;
-	acpi_dev_ioresource_flags(res, len, io_decode);
+	acpi_dev_ioresource_flags(res, len, 0, io_decode);
 }
 
 /**
@@ -231,7 +231,7 @@ static bool acpi_decode_space(struct resource_win *win,
 		acpi_dev_memresource_flags(res, len, wp);
 		break;
 	case ACPI_IO_RANGE:
-		acpi_dev_ioresource_flags(res, len, iodec);
+		acpi_dev_ioresource_flags(res, len, offset, iodec);
 		break;
 	case ACPI_BUS_NUMBER_RANGE:
 		res->flags = IORESOURCE_BUS;
-- 
1.7.10.4


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