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Instead of assuming units of bytes, it seems more likely that this is

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a bitfield.
This commit is contained in:
njl 2005-02-25 16:57:34 +00:00
parent 1a9520ab04
commit b869007e12
1 changed files with 5 additions and 10 deletions
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15
sys/dev/acpica/acpi.c
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@ -1096,19 +1096,14 @@ acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
}
/*
* If the register width is less than 4, assume the BIOS author made a
* mistake and assumed the width is in units of bytes not bits. Ugh.
* If the register width is less than 8, assume the BIOS author means
* it is a bit field and just allocate a byte.
*/
switch (gas->RegisterBitWidth) {
case 1:
case 2:
case 4:
gas->RegisterBitWidth *= 8;
break;
}
if (gas->RegisterBitWidth && gas->RegisterBitWidth < 8)
gas->RegisterBitWidth = 8;
/* Validate the address after we're sure we support the space. */
if (!ACPI_VALID_ADDRESS(gas->Address) || gas->RegisterBitWidth < 8)
if (!ACPI_VALID_ADDRESS(gas->Address) || gas->RegisterBitWidth == 0)
return (EINVAL);
bus_set_resource(dev, res_type, *rid, gas->Address,