[PATCH v2 1/2] x86: acpi: Fix calculation of DSDT length

[Wolfgang Wallner]

Currently, the calculation for the length of the DSDT table includes any
bytes that are added for alignment, but those bytes are not initialized.

This is because the DSDT length is calculated after a call to
acpi_inc_align(). Split this up into the following sequence:

  * acpi_inc()
  * Calculate DSDT length
  * acpi_align()

Signed-off-by: Wolfgang Wallner <wolfgang.wallner at br-automation.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>
Reviewed-by: Simon Glass <sjg at chromium.org>

---

Changes in v2:
 - Added Reviewed-by tags

 arch/x86/lib/acpi_table.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c
index 3a93fedfc3..6b827bfa3f 100644
--- a/arch/x86/lib/acpi_table.c
+++ b/arch/x86/lib/acpi_table.c
@@ -427,7 +427,7 @@ ulong write_acpi_tables(ulong start_addr)
 	       (char *)&AmlCode + sizeof(struct acpi_table_header),
 	       dsdt->length - sizeof(struct acpi_table_header));
 
-	acpi_inc_align(ctx, dsdt->length - sizeof(struct acpi_table_header));
+	acpi_inc(ctx, dsdt->length - sizeof(struct acpi_table_header));
 
 	/* Pack GNVS into the ACPI table area */
 	for (i = 0; i < dsdt->length; i++) {
@@ -450,6 +450,8 @@ ulong write_acpi_tables(ulong start_addr)
 	dsdt->checksum = 0;
 	dsdt->checksum = table_compute_checksum((void *)dsdt, dsdt->length);
 
+	acpi_align(ctx);
+
 	/*
 	 * Fill in platform-specific global NVS variables. If this fails we
 	 * cannot return the error but this should only happen while debugging.
-- 
2.28.0