hp-wmi: clear rfkill device pointers when appropriate
authorAnssi Hannula <anssi.hannula@iki.fi>
Sun, 20 Feb 2011 18:07:24 +0000 (20:07 +0200)
committerMatthew Garrett <mjg@redhat.com>
Mon, 28 Mar 2011 10:07:18 +0000 (06:07 -0400)
NULLify rfkill pointers during initialization. This prevents dereference
of invalid pointer in case the driver is rebound and some rfkill device
isn't detected anymore. Clear them also in hp_wmi_rfkill_setup failure
path so that an rfkill initialization failure doesn't need to be fatal
for the whole driver.

Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
drivers/platform/x86/hp-wmi.c

index f6a1c37..45b2bbe 100644 (file)
@@ -587,14 +587,17 @@ static int __devinit hp_wmi_rfkill_setup(struct platform_device *device)
        return 0;
 register_wwan_err:
        rfkill_destroy(wwan_rfkill);
+       wwan_rfkill = NULL;
        if (bluetooth_rfkill)
                rfkill_unregister(bluetooth_rfkill);
 register_bluetooth_error:
        rfkill_destroy(bluetooth_rfkill);
+       bluetooth_rfkill = NULL;
        if (wifi_rfkill)
                rfkill_unregister(wifi_rfkill);
 register_wifi_error:
        rfkill_destroy(wifi_rfkill);
+       wifi_rfkill = NULL;
        return err;
 }
 
@@ -602,6 +605,11 @@ static int __devinit hp_wmi_bios_setup(struct platform_device *device)
 {
        int err;
 
+       /* clear detected rfkill devices */
+       wifi_rfkill = NULL;
+       bluetooth_rfkill = NULL;
+       wwan_rfkill = NULL;
+
        err = hp_wmi_rfkill_setup(device);
        if (err)
                return err;