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-rw-r--r--drivers/platform/x86/intel-vbtn.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c
index 500fae82e12c..4921fc15dc6c 100644
--- a/drivers/platform/x86/intel-vbtn.c
+++ b/drivers/platform/x86/intel-vbtn.c
@@ -158,12 +158,22 @@ static void detect_tablet_mode(struct platform_device *device)
static bool intel_vbtn_has_switches(acpi_handle handle)
{
const char *chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
+ unsigned long chassis_type_int;
unsigned long long vgbs;
acpi_status status;
- if (!(chassis_type && strcmp(chassis_type, "31") == 0))
+ if (kstrtoul(chassis_type, 10, &chassis_type_int))
return false;
+ switch (chassis_type_int) {
+ case 8: /* Portable */
+ case 31: /* Convertible */
+ case 32: /* Detachable */
+ break;
+ default:
+ return false;
+ }
+
status = acpi_evaluate_integer(handle, "VGBS", NULL, &vgbs);
return ACPI_SUCCESS(status);
}