[PATCH] cpqphp: fix oops during unload without probe

drivers/pci/hotplug/cpqphp_core.c calls cpqphp_event_start_thread()
in one_time_init(), which is called whenever the hardware is probed.
Unfortunately, cpqphp_event_stop_thread() is *always* called when
the module is unloaded. If the hardware is never probed, then
cpqphp_event_stop_thread() tries to manipulate a couple of
uninitialized mutexes.

Signed-off-by: Keith Moore <keithmo@exmsft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/pci/hotplug/cpqphp_core.c b/drivers/pci/hotplug/cpqphp_core.c
index afbccfa..8c6d398 100644 (file)
--- a/drivers/pci/hotplug/cpqphp_core.c
+++ b/drivers/pci/hotplug/cpqphp_core.c
@@ -60,6 +60,7 @@ static void __iomem *smbios_start;
 static void __iomem *cpqhp_rom_start;
 static int power_mode;
 static int debug;
+static int initialized;
 
 #define DRIVER_VERSION "0.9.8"
 #define DRIVER_AUTHOR  "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>"
@@ -1271,7 +1272,6 @@ static int one_time_init(void)
 {
        int loop;
        int retval = 0;
-       static int initialized = 0;
 
        if (initialized)
                return 0;
@@ -1441,7 +1441,8 @@ static void __exit unload_cpqphpd(void)
        }
 
        // Stop the notification mechanism
-       cpqhp_event_stop_thread();
+       if (initialized)
+               cpqhp_event_stop_thread();
 
        //unmap the rom address
        if (cpqhp_rom_start)