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authorBob Moore <robert.moore@intel.com>2008-06-10 02:12:50 -0400
committerLen Brown <len.brown@intel.com>2008-06-11 19:13:47 -0400
commitbc45b1d39a925b56796bebf8a397a0491489d85c (patch)
tree0a69ef3a3cdb1cdf0f181c25583284e7a0a91fcf /drivers
parent7aa7d4336df34e32195557a1ad422627bd69ef0b (diff)
ACPICA: Ignore ACPI table signature for Load() operator
Only "SSDT" is acceptable to the ACPI spec, but tables are seen with OEMx and null sigs. Therefore, signature validation is worthless. Apparently MS ACPI accepts such signatures, ACPICA must be compatible. http://bugzilla.kernel.org/show_bug.cgi?id=10454 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/tables/tbinstal.c25
1 files changed, 7 insertions, 18 deletions
diff --git a/drivers/acpi/tables/tbinstal.c b/drivers/acpi/tables/tbinstal.c
index 402f93e1ff20..5336ce88f89f 100644
--- a/drivers/acpi/tables/tbinstal.c
+++ b/drivers/acpi/tables/tbinstal.c
@@ -123,24 +123,13 @@ acpi_tb_add_table(struct acpi_table_desc *table_desc,
123 } 123 }
124 } 124 }
125 125
126 /* The table must be either an SSDT or a PSDT or an OEMx */ 126 /*
127 127 * Originally, we checked the table signature for "SSDT" or "PSDT" here.
128 if (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_PSDT)&& 128 * Next, we added support for OEMx tables, signature "OEM".
129 !ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT)&& 129 * Valid tables were encountered with a null signature, so we've just
130 strncmp(table_desc->pointer->signature, "OEM", 3)) { 130 * given up on validating the signature, since it seems to be a waste
131 /* Check for a printable name */ 131 * of code. The original code was removed (05/2008).
132 if (acpi_ut_valid_acpi_name( 132 */
133 *(u32 *) table_desc->pointer->signature)) {
134 ACPI_ERROR((AE_INFO, "Table has invalid signature "
135 "[%4.4s], must be SSDT or PSDT",
136 table_desc->pointer->signature));
137 } else {
138 ACPI_ERROR((AE_INFO, "Table has invalid signature "
139 "(0x%8.8X), must be SSDT or PSDT",
140 *(u32 *) table_desc->pointer->signature));
141 }
142 return_ACPI_STATUS(AE_BAD_SIGNATURE);
143 }
144 133
145 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 134 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
146 135