Messages in this thread Patch in this message | | | From | Linn Crosetto <> | Subject | [PATCH] acpi: remove length check for large registers | Date | Fri, 15 Mar 2013 13:56:07 -0600 |
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The legacy bit width field in the Generic Address Structure is 1 byte, limiting the reportable register width to 255 bits. Larger registers will cause a length mismatch warning to be printed in acpi_tb_validate_fadt().
To avoid the warning, disable the length mismatch check for registers larger than 255 bits.
Signed-off-by: Linn Crosetto <linn@hp.com> --- drivers/acpi/acpica/tbfadt.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/acpi/acpica/tbfadt.c b/drivers/acpi/acpica/tbfadt.c index 74181bf..e87abcd 100644 --- a/drivers/acpi/acpica/tbfadt.c +++ b/drivers/acpi/acpica/tbfadt.c @@ -561,6 +561,7 @@ static void acpi_tb_validate_fadt(void) * legacy length field and the corresponding 64-bit X length field. */ if (address64->address && + ACPI_MUL_8(length) <= ACPI_UINT8_MAX && (address64->bit_width != ACPI_MUL_8(length))) { ACPI_BIOS_WARNING((AE_INFO, "32/64X length mismatch in FADT/%s: %u/%u", -- 1.7.11.3
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