disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/acpi/acpica/hwvalid.c
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@@ -3,7 +3,7 @@
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  *
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  * Module Name: hwvalid - I/O request validation
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  *
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- * Copyright (C) 2000 - 2018, Intel Corp.
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+ * Copyright (C) 2000 - 2020, Intel Corp.
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  *
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  *****************************************************************************/
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@@ -23,8 +23,8 @@
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  *
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  * The table is used to implement the Microsoft port access rules that
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  * first appeared in Windows XP. Some ports are always illegal, and some
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- * ports are only illegal if the BIOS calls _OSI with a win_XP string or
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- * later (meaning that the BIOS itelf is post-XP.)
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+ * ports are only illegal if the BIOS calls _OSI with nothing newer than
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+ * the specific _OSI strings.
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  *
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  * This provides ACPICA with the desired port protections and
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  * Microsoft compatibility.
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@@ -145,7 +145,8 @@
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 			/* Port illegality may depend on the _OSI calls made by the BIOS */
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-			if (acpi_gbl_osi_data >= port_info->osi_dependency) {
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+			if (port_info->osi_dependency == ACPI_ALWAYS_ILLEGAL ||
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+			    acpi_gbl_osi_data == port_info->osi_dependency) {
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 				ACPI_DEBUG_PRINT((ACPI_DB_VALUES,
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 						  "Denied AML access to port 0x%8.8X%8.8X/%X (%s 0x%.4X-0x%.4X)\n",
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 						  ACPI_FORMAT_UINT64(address),
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@@ -292,3 +293,33 @@
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 	return (AE_OK);
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 }
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+
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+/******************************************************************************
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+ *
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+ * FUNCTION:    acpi_hw_validate_io_block
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+ *
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+ * PARAMETERS:  Address             Address of I/O port/register blobk
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+ *              bit_width           Number of bits (8,16,32) in each register
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+ *              count               Number of registers in the block
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+ *
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+ * RETURN:      Status
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+ *
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+ * DESCRIPTION: Validates a block of I/O ports/registers.
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+ *
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+ ******************************************************************************/
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+
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+acpi_status acpi_hw_validate_io_block(u64 address, u32 bit_width, u32 count)
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+{
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+	acpi_status status;
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+
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+	while (count--) {
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+		status = acpi_hw_validate_io_request((acpi_io_address)address,
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+						     bit_width);
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+		if (ACPI_FAILURE(status))
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+			return_ACPI_STATUS(status);
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+
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+		address += ACPI_DIV_8(bit_width);
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+	}
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+
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+	return_ACPI_STATUS(AE_OK);
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+}