It was reported by a user with a Dell m15 R5 (5800H) that
the keyboard backlight was turning on when entering suspend
and turning off when exiting (the opposite of how it should be).

The user bisected it back to commit 5dbf50997578 ("ACPI: PM:
s2idle: Add support for new Microsoft UUID").  Previous to that
commit the LEDs didn't turn off at all.  Confirming in the spec,
these were reversed when introduced.

Fix them to match the spec.

BugLink: https://gitlab.freedesktop.org/drm/amd/-/issues/1230#note_1021836
Fixes: 5dbf50997578 ("ACPI: PM: s2idle: Add support for new Microsoft UUID")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
 drivers/acpi/x86/s2idle.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/x86/s2idle.c b/drivers/acpi/x86/s2idle.c
index fbdbef0ab552..3a308461246a 100644
--- a/drivers/acpi/x86/s2idle.c
+++ b/drivers/acpi/x86/s2idle.c

@@ -452,7 +452,7 @@ int acpi_s2idle_prepare_late(void)
        if (lps0_dsm_func_mask_microsoft > 0) {
                acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF,
                                lps0_dsm_func_mask_microsoft, lps0_dsm_guid_microsoft);
-               acpi_sleep_run_lps0_dsm(ACPI_LPS0_MS_EXIT,
+               acpi_sleep_run_lps0_dsm(ACPI_LPS0_MS_ENTRY,
                                lps0_dsm_func_mask_microsoft, lps0_dsm_guid_microsoft);
                acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY,
                                lps0_dsm_func_mask_microsoft, lps0_dsm_guid_microsoft);

@@ -479,7 +479,7 @@ void acpi_s2idle_restore_early(void)
        if (lps0_dsm_func_mask_microsoft > 0) {
                acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT,
                                lps0_dsm_func_mask_microsoft, lps0_dsm_guid_microsoft);
-               acpi_sleep_run_lps0_dsm(ACPI_LPS0_MS_ENTRY,
+               acpi_sleep_run_lps0_dsm(ACPI_LPS0_MS_EXIT,
                                lps0_dsm_func_mask_microsoft, lps0_dsm_guid_microsoft);
                acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON,
                                lps0_dsm_func_mask_microsoft, lps0_dsm_guid_microsoft);
--