dell-laptop: If there is no hwswitch, then clear all hw-controlled bits

To ensure we don't enter any hw-switch related code paths on machines without
a hw-switch.

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

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index bae932b60bab..48fabf6b6ecb 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -548,6 +548,9 @@ 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 & (1<<2|1<<8)) == (1<<2|1<<8)) {