Before jumping to OS waking up vector, we need turn on ACPI mode
for S3, just like what we do for a normal boot.

Signed-off-by: Bin Meng <bmeng...@gmail.com>
Reviewed-by: Simon Glass <s...@chromium.org>
---

Changes in v2: None

 arch/x86/lib/acpi_s3.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/lib/acpi_s3.c b/arch/x86/lib/acpi_s3.c
index e5cc3b0..0b62b75 100644
--- a/arch/x86/lib/acpi_s3.c
+++ b/arch/x86/lib/acpi_s3.c
@@ -24,6 +24,9 @@ void acpi_resume(struct acpi_fadt *fadt)
 {
        void *wake_vec;
 
+       /* Turn on ACPI mode for S3 */
+       enter_acpi_mode(fadt->pm1a_cnt_blk);
+
        wake_vec = acpi_find_wakeup_vector(fadt);
 
        post_code(POST_OS_RESUME);
-- 
2.9.2

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