On Sat, Oct 13, 2018 at 10:06:18AM -0700, Randy Dunlap wrote:
> From: Randy Dunlap <rdun...@infradead.org>
>
> 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 <rdun...@infradead.org>
> Cc: Robert Jarzmik <robert.jarz...@free.fr>
> Cc: Charles Keepax <ckee...@opensource.wolfsonmicro.com>
> Cc: Dmitry Torokhov <dmitry.torok...@gmail.com>
> Cc: Mark Brown <broo...@kernel.org>
> Cc: patc...@opensource.cirrus.com
> Cc: linux-in...@vger.kernel.org
Applied, thank you.
> ---
> 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);
> }
>
>
>
--
Dmitry
