Get the privacy-screen / lcdshadow ACPI handles once and cache them,
instead of retrieving them every time we need them.
Signed-off-by: Hans de Goede <hdego...@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 683c175cc28a..fe919700b8ae 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -9759,19 +9759,15 @@ 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;
@@ -9789,15 +9785,17 @@ 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;
}
--
2.31.1
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