dell-laptop: Only enable rfkill functionality on laptops with a hw killswitch

All my testing has been on laptops with a hw killswitch, so to be on the
safe side disable rfkill functionality on models without a hw killswitch for
now. Once we gather some feedback on laptops without a hw killswitch this
decision maybe reconsidered.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>

1 files changed, 10 insertions, 3 deletions

diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index bd67c893ba07..c608b1d33f4a 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -580,11 +580,18 @@ static int __init dell_setup_rfkill(void)
         buffer->input[0] = 0x2;
         dell_send_request(buffer, 17, 11);
         hwswitch_state = buffer->output[1];
-        /* If there is no hwswitch, then clear all hw-controlled bits */
-        if (!(status & BIT(0)))
-                hwswitch_state &= ~7;
         release_buffer();
 
+        if (!(status & BIT(0))) {
+                if (force_rfkill) {
+                        /* No hwsitch, clear all hw-controlled bits */
+                        hwswitch_state &= ~7;
+                } else {
+                        /* rfkill is only tested on laptops with a hwswitch */
+                        return 0;
+                }
+        }
+
         if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
                 wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
                                            RFKILL_TYPE_WLAN,