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Commit 21126b29 authored by Bob Moore's avatar Bob Moore Committed by Rafael J. Wysocki
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ACPICA: Remove extraneous error message for large number of GPEs. 



Fixes a problem where an extraneous error message was emitted during
initialization if there is a GPE block larger than 255 bits. Any
GPE block larger than 120 GPEs could generate the error.

Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarLv Zheng <lv.zheng@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 57429a40

drivers/acpi/acpica/tbfadt.c

+33 −18
Original line number Diff line number Diff line
@@ -52,7 +52,8 @@ ACPI_MODULE_NAME("tbfadt") 
static void

acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,

			     u8 space_id,

			     u8 byte_width, u64 address, char *register_name);

			     u8 byte_width,

			     u64 address, char *register_name, u8 flags);



static void acpi_tb_convert_fadt(void);
@@ -69,13 +70,14 @@ typedef struct acpi_fadt_info { 
	u16 address32;

	u16 length;

	u8 default_length;

	u8 type;

	u8 flags;



} acpi_fadt_info;



#define ACPI_FADT_OPTIONAL          0

#define ACPI_FADT_REQUIRED          1

#define ACPI_FADT_SEPARATE_LENGTH   2

#define ACPI_FADT_GPE_REGISTER      4



static struct acpi_fadt_info fadt_info_table[] = {

	{"Pm1aEventBlock",
@@ -125,14 +127,14 @@ static struct acpi_fadt_info fadt_info_table[] = { 
	 ACPI_FADT_OFFSET(gpe0_block),

	 ACPI_FADT_OFFSET(gpe0_block_length),

	 0,

	 ACPI_FADT_SEPARATE_LENGTH},

	 ACPI_FADT_SEPARATE_LENGTH | ACPI_FADT_GPE_REGISTER},



	{"Gpe1Block",

	 ACPI_FADT_OFFSET(xgpe1_block),

	 ACPI_FADT_OFFSET(gpe1_block),

	 ACPI_FADT_OFFSET(gpe1_block_length),

	 0,

	 ACPI_FADT_SEPARATE_LENGTH}

	 ACPI_FADT_SEPARATE_LENGTH | ACPI_FADT_GPE_REGISTER}

};



#define ACPI_FADT_INFO_ENTRIES \
@@ -189,19 +191,29 @@ static struct acpi_fadt_pm_info fadt_pm_info_table[] = { 
static void

acpi_tb_init_generic_address(struct acpi_generic_address *generic_address,

			     u8 space_id,

			     u8 byte_width, u64 address, char *register_name)

			     u8 byte_width,

			     u64 address, char *register_name, u8 flags)

{

	u8 bit_width;



	/* Bit width field in the GAS is only one byte long, 255 max */



	/*

	 * Bit width field in the GAS is only one byte long, 255 max.

	 * Check for bit_width overflow in GAS.

	 */

	bit_width = (u8)(byte_width * 8);



	if (byte_width > 31) {	/* (31*8)=248 */

	if (byte_width > 31) {	/* (31*8)=248, (32*8)=256 */

		/*

		 * No error for GPE blocks, because we do not use the bit_width

		 * for GPEs, the legacy length (byte_width) is used instead to

		 * allow for a large number of GPEs.

		 */

		if (!(flags & ACPI_FADT_GPE_REGISTER)) {

			ACPI_ERROR((AE_INFO,

				    "%s - 32-bit FADT register is too long (%u bytes, %u bits) "

				    "to convert to GAS struct - 255 bits max, truncating",

			    register_name, byte_width, (byte_width * 8)));

				    register_name, byte_width,

				    (byte_width * 8)));

		}



		bit_width = 255;

	}
@@ -450,6 +462,7 @@ static void acpi_tb_convert_fadt(void) 
	struct acpi_generic_address *address64;

	u32 address32;

	u8 length;

	u8 flags;

	u32 i;



	/*
@@ -515,6 +528,7 @@ static void acpi_tb_convert_fadt(void) 
				       fadt_info_table[i].length);



		name = fadt_info_table[i].name;

		flags = fadt_info_table[i].flags;



		/*

		 * Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X"
@@ -554,7 +568,7 @@ static void acpi_tb_convert_fadt(void) 
									   [i].

									   length),

							     (u64)address32,

							     name);

							     name, flags);

			} else if (address64->address != (u64)address32) {



				/* Address mismatch */
@@ -582,7 +596,8 @@ static void acpi_tb_convert_fadt(void) 
								      length),

								     (u64)

								     address32,

								     name);

								     name,

								     flags);

				}

			}

		}
@@ -603,7 +618,7 @@ static void acpi_tb_convert_fadt(void) 
					   address64->bit_width));

		}



		if (fadt_info_table[i].type & ACPI_FADT_REQUIRED) {

		if (fadt_info_table[i].flags & ACPI_FADT_REQUIRED) {

			/*

			 * Field is required (Pm1a_event, Pm1a_control).

			 * Both the address and length must be non-zero.
@@ -617,7 +632,7 @@ static void acpi_tb_convert_fadt(void) 
								    address),

						 length));

			}

		} else if (fadt_info_table[i].type & ACPI_FADT_SEPARATE_LENGTH) {

		} else if (fadt_info_table[i].flags & ACPI_FADT_SEPARATE_LENGTH) {

			/*

			 * Field is optional (Pm2_control, GPE0, GPE1) AND has its own

			 * length field. If present, both the address and length must
@@ -726,7 +741,7 @@ static void acpi_tb_setup_fadt_registers(void) 
						     (fadt_pm_info_table[i].

						      register_num *

						      pm1_register_byte_width),

						     "PmRegisters");

						     "PmRegisters", 0);

		}

	}

}