From: Len Brown <len.brown@intel.com>
Date: Wed, 25 Feb 2009 23:00:18 +0000 (-0500)
Subject: Revert "ACPI: make some IO ports off-limits to AML"
X-Git-Tag: firefly_0821_release~15293^2~4
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7b46ecd5fcebf381a7bde966db352d8fb1b8e944;p=firefly-linux-kernel-4.4.55.git

Revert "ACPI: make some IO ports off-limits to AML"

This reverts commit 5ec5d38a1c8af255ffc481c81eef13e9155524b3.
because it caused spurious dmesg warmings.
We'll implement the check for off-limit ports
in a more clever way in the future.

http://bugzilla.kernel.org/show_bug.cgi?id=12758

Signed-off-by: Len Brown <len.brown@intel.com>
---

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index b3193ec0a2ef..1e35f342957c 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1317,54 +1317,6 @@ acpi_os_validate_interface (char *interface)
 	return AE_SUPPORT;
 }
 
-#ifdef	CONFIG_X86
-
-struct aml_port_desc {
-	uint	start;
-	uint	end;
-	char*   name;
-	char	warned;
-};
-
-static struct aml_port_desc aml_invalid_port_list[] = {
-	{0x20, 0x21, "PIC0", 0},
-	{0xA0, 0xA1, "PIC1", 0},
-	{0x4D0, 0x4D1, "ELCR", 0}
-};
-
-/*
- * valid_aml_io_address()
- *
- * if valid, return true
- * else invalid, warn once, return false
- */
-static bool valid_aml_io_address(uint address, uint length)
-{
-	int i;
-	int entries = sizeof(aml_invalid_port_list) / sizeof(struct aml_port_desc);
-
-	for (i = 0; i < entries; ++i) {
-		if ((address >= aml_invalid_port_list[i].start &&
-			address <= aml_invalid_port_list[i].end) ||
-			(address + length >= aml_invalid_port_list[i].start &&
-			address  + length <= aml_invalid_port_list[i].end))
-		{
-			if (!aml_invalid_port_list[i].warned)
-			{
-				printk(KERN_ERR "ACPI: Denied BIOS AML access"
-					" to invalid port 0x%x+0x%x (%s)\n",
-					address, length,
-					aml_invalid_port_list[i].name);
-				aml_invalid_port_list[i].warned = 1;
-			}
-			return false;	/* invalid */
-		}
-	}
-	return true;	/* valid */
-}
-#else
-static inline bool valid_aml_io_address(uint address, uint length) { return true; }
-#endif
 /******************************************************************************
  *
  * FUNCTION:    acpi_os_validate_address
@@ -1394,8 +1346,6 @@ acpi_os_validate_address (
 
 	switch (space_id) {
 	case ACPI_ADR_SPACE_SYSTEM_IO:
-		if (!valid_aml_io_address(address, length))
-			return AE_AML_ILLEGAL_ADDRESS;
 	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
 		/* Only interference checks against SystemIO and SytemMemory
 		   are needed */