Get the privacy-screen / lcdshadow ACPI handles once and cache them, instead of retrieving them every time we need them.
Reviewed-by: Emil Velikov emil.l.velikov@gmail.com Reviewed-by: Lyude Paul lyude@redhat.com Signed-off-by: Hans de Goede hdegoede@redhat.com --- drivers/platform/x86/thinkpad_acpi.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-)
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 83c88a8ebaf2..b8f2556c4797 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -9819,19 +9819,15 @@ static struct ibm_struct battery_driver_data = { * LCD Shadow subdriver, for the Lenovo PrivacyGuard feature */
+static acpi_handle lcdshadow_get_handle; +static acpi_handle lcdshadow_set_handle; static int lcdshadow_state;
static int lcdshadow_on_off(bool state) { - acpi_handle set_shadow_handle; int output;
- if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "SSSS", &set_shadow_handle))) { - pr_warn("Thinkpad ACPI has no %s interface.\n", "SSSS"); - return -EIO; - } - - if (!acpi_evalf(set_shadow_handle, &output, NULL, "dd", (int)state)) + if (!acpi_evalf(lcdshadow_set_handle, &output, NULL, "dd", (int)state)) return -EIO;
lcdshadow_state = state; @@ -9849,15 +9845,17 @@ static int lcdshadow_set(bool on)
static int tpacpi_lcdshadow_init(struct ibm_init_struct *iibm) { - acpi_handle get_shadow_handle; + acpi_status status1, status2; int output;
- if (ACPI_FAILURE(acpi_get_handle(hkey_handle, "GSSS", &get_shadow_handle))) { + status1 = acpi_get_handle(hkey_handle, "GSSS", &lcdshadow_get_handle); + status2 = acpi_get_handle(hkey_handle, "SSSS", &lcdshadow_set_handle); + if (ACPI_FAILURE(status1) || ACPI_FAILURE(status2)) { lcdshadow_state = -ENODEV; return 0; }
- if (!acpi_evalf(get_shadow_handle, &output, NULL, "dd", 0)) { + if (!acpi_evalf(lcdshadow_get_handle, &output, NULL, "dd", 0)) { lcdshadow_state = -EIO; return -EIO; }