From 6d97db590ca2787c202cf35e76f5d24b3007bc7c Mon Sep 17 00:00:00 2001 From: Anssi Hannula Date: Sun, 20 Feb 2011 20:07:24 +0200 Subject: [PATCH] hp-wmi: clear rfkill device pointers when appropriate 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 Signed-off-by: Matthew Garrett --- drivers/platform/x86/hp-wmi.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c index f6a1c37..45b2bbe 100644 --- a/drivers/platform/x86/hp-wmi.c +++ b/drivers/platform/x86/hp-wmi.c @@ -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; -- 2.7.4