diff options
| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2022-07-11 14:26:06 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2022-07-27 21:16:32 +0200 |
| commit | 369af6bf2c28f9f57438e82f953f6351cf2a94cd (patch) | |
| tree | 1a3767901230f6596feb746df42d1b5d749c7d69 /drivers/acpi/property.c | |
| parent | 103e10c69c611efabccf57d799c4b191d53ee765 (diff) | |
ACPI: property: Read buffer properties as integers
Instead of adding a new property type, read buffer properties as integers.
Even though the internal representation in ACPI is different, the data
type is the same (byte) than on 8-bit integers.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/property.c')
| -rw-r--r-- | drivers/acpi/property.c | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c index 7e3d163a6b1f..d26f630f2a7c 100644 --- a/drivers/acpi/property.c +++ b/drivers/acpi/property.c @@ -1033,6 +1033,10 @@ static int acpi_data_prop_read_single(const struct acpi_device_data *data, int ret = 0; \ \ for (i = 0; i < __nval; i++) { \ + if (__items->type == ACPI_TYPE_BUFFER) { \ + __val[i] = __items->buffer.pointer[i]; \ + continue; \ + } \ if (__items[i].type != ACPI_TYPE_INTEGER) { \ ret = -EPROTO; \ break; \ @@ -1092,18 +1096,41 @@ static int acpi_data_prop_read(const struct acpi_device_data *data, } ret = acpi_data_get_property_array(data, propname, ACPI_TYPE_ANY, &obj); + if (ret && proptype >= DEV_PROP_U8 && proptype <= DEV_PROP_U64) + ret = acpi_data_get_property(data, propname, ACPI_TYPE_BUFFER, + &obj); if (ret) return ret; - if (!val) + if (!val) { + if (obj->type == ACPI_TYPE_BUFFER) + return obj->buffer.length; + return obj->package.count; + } - if (proptype != DEV_PROP_STRING && nval > obj->package.count) - return -EOVERFLOW; + switch (proptype) { + case DEV_PROP_STRING: + break; + case DEV_PROP_U8 ... DEV_PROP_U64: + if (obj->type == ACPI_TYPE_BUFFER) { + if (nval > obj->buffer.length) + return -EOVERFLOW; + break; + } + fallthrough; + default: + if (nval > obj->package.count) + return -EOVERFLOW; + break; + } if (nval == 0) return -EINVAL; - items = obj->package.elements; + if (obj->type != ACPI_TYPE_BUFFER) + items = obj->package.elements; + else + items = obj; switch (proptype) { case DEV_PROP_U8: |