Index: acpi_toshiba.c
===================================================================
--- acpi_toshiba.c      (revision 245135)
+++ acpi_toshiba.c      (working copy)
@@ -324,7 +324,7 @@

        ACPI_SERIAL_ASSERT(toshiba);
        if (op == HCI_SET) {
-               if (*state < 0 || *state > 1)
+               if (*state > 1)
                        return (EINVAL);
                *state <<= HCI_FAN_SHIFT;
        }
@@ -368,7 +368,7 @@

        ACPI_SERIAL_ASSERT(toshiba);
        if (op == HCI_SET) {
-               if (*brightness < 0 || *brightness > HCI_LCD_BRIGHTNESS_MAX)
+               if (*brightness > HCI_LCD_BRIGHTNESS_MAX)
                        return (EINVAL);
                *brightness <<= HCI_LCD_BRIGHTNESS_SHIFT;
        }
@@ -384,7 +384,7 @@

        ACPI_SERIAL_ASSERT(toshiba);
        if (op == HCI_SET) {
-               if (*backlight < 0 || *backlight > 1)
+               if (*backlight > 1)
                        return (EINVAL);
        }
        return (hci_call(h, op, HCI_REG_LCD_BACKLIGHT, backlight));
@@ -397,7 +397,7 @@

        ACPI_SERIAL_ASSERT(toshiba);
        if (op == HCI_SET) {
-               if (*speed < 0 || *speed > HCI_CPU_SPEED_MAX)
+               if (*speed > HCI_CPU_SPEED_MAX)
                        return (EINVAL);
                *speed <<= HCI_CPU_SPEED_SHIFT;
        }