From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Loading then unloading wm97xx-ts.ko when CONFIG_AC97_BUS=m
causes a WARNING: from drivers/base/driver.c:
Unexpected driver unregister!
WARNING: CPU: 0 PID: 1709 at ../drivers/base/driver.c:193 driver_unregister+0x30/0x40
Fix this by only calling driver_unregister() with the same
condition that driver_register() is called.
Fixes: ae9d1b5fbd7b ("Input: wm97xx: add new AC97 bus support")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Robert Jarzmik <robert.jarzmik@xxxxxxx>
Cc: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Cc: Mark Brown <broonie@xxxxxxxxxx>
Cc: patches@xxxxxxxxxxxxxxxxxxxxx
Cc: linux-input@xxxxxxxxxxxxxxx
---
drivers/input/touchscreen/wm97xx-core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- lnx-419-rc7.orig/drivers/input/touchscreen/wm97xx-core.c
+++ lnx-419-rc7/drivers/input/touchscreen/wm97xx-core.c
@@ -929,7 +929,8 @@ static int __init wm97xx_init(void)
static void __exit wm97xx_exit(void)
{
- driver_unregister(&wm97xx_driver);
+ if (IS_BUILTIN(CONFIG_AC97_BUS))
+ driver_unregister(&wm97xx_driver);
platform_driver_unregister(&wm97xx_mfd_driver);
}
