1 files changed, 13 insertions, 6 deletions

diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c
index f0b52266b3ac..1ab1460c4a4e 100644
--- a/drivers/acpi/acpi_video.c
+++ b/drivers/acpi/acpi_video.c
@@ -2124,21 +2124,28 @@ static int __init intel_opregion_present(void)
         return opregion;
 }
 
+/* Check if the chassis-type indicates there is no builtin LCD panel */
 static bool dmi_is_desktop(void)
 {
         const char *chassis_type;
+        unsigned long type;
 
         chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
         if (!chassis_type)
                 return false;
 
-        if (!strcmp(chassis_type, "3") || /*  3: Desktop */
-            !strcmp(chassis_type, "4") || /*  4: Low Profile Desktop */
-            !strcmp(chassis_type, "5") || /*  5: Pizza Box */
-            !strcmp(chassis_type, "6") || /*  6: Mini Tower */
-            !strcmp(chassis_type, "7") || /*  7: Tower */
-            !strcmp(chassis_type, "11"))  /* 11: Main Server Chassis */
+        if (kstrtoul(chassis_type, 10, &type) != 0)
+                return false;
+
+        switch (type) {
+        case 0x03: /* Desktop */
+        case 0x04: /* Low Profile Desktop */
+        case 0x05: /* Pizza Box */
+        case 0x06: /* Mini Tower */
+        case 0x07: /* Tower */
+        case 0x11: /* Main Server Chassis */
                 return true;
+        }
 
         return false;
 }