diff options
Diffstat (limited to 'src/core/acpi_settings.c')
| -rw-r--r-- | src/core/acpi_settings.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/src/core/acpi_settings.c b/src/core/acpi_settings.c index b9e2b7f61..8dc2a7fd8 100644 --- a/src/core/acpi_settings.c +++ b/src/core/acpi_settings.c @@ -22,6 +22,7 @@ */ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); +FILE_SECBOOT ( PERMITTED ); /** * @file @@ -64,14 +65,15 @@ static int acpi_settings_applies ( struct settings *settings __unused, static int acpi_settings_fetch ( struct settings *settings, struct setting *setting, void *data, size_t len ) { - struct acpi_header acpi; + const struct acpi_header *acpi; + const uint8_t *src; + uint8_t *dst; uint32_t tag_high; uint32_t tag_low; uint32_t tag_signature; unsigned int tag_index; size_t tag_offset; size_t tag_len; - userptr_t table; size_t offset; size_t max_len; int delta; @@ -88,15 +90,12 @@ static int acpi_settings_fetch ( struct settings *settings, acpi_name ( tag_signature ), tag_index, tag_offset, tag_len ); /* Locate ACPI table */ - table = acpi_table ( tag_signature, tag_index ); - if ( ! table ) + acpi = acpi_table ( tag_signature, tag_index ); + if ( ! acpi ) return -ENOENT; - /* Read table header */ - copy_from_user ( &acpi, table, 0, sizeof ( acpi ) ); - /* Calculate starting offset and maximum available length */ - max_len = le32_to_cpu ( acpi.length ); + max_len = le32_to_cpu ( acpi->length ); if ( tag_offset > max_len ) return -ENOENT; offset = tag_offset; @@ -115,10 +114,11 @@ static int acpi_settings_fetch ( struct settings *settings, } /* Read data */ + src = ( ( ( const void * ) acpi ) + offset ); + dst = data; for ( i = 0 ; ( ( i < max_len ) && ( i < len ) ) ; i++ ) { - copy_from_user ( data, table, offset, 1 ); - data++; - offset += delta; + *(dst++) = *src; + src += delta; } /* Set type if not already specified */ @@ -157,5 +157,6 @@ static void acpi_settings_init ( void ) { /** ACPI settings initialiser */ struct init_fn acpi_settings_init_fn __init_fn ( INIT_NORMAL ) = { + .name = "acpi", .initialise = acpi_settings_init, }; |