4.19-stable review patch. If anyone has any objections, please let me know.
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From: Randy Dunlap rdunlap@infradead.org
[ Upstream commit a3f7c3fcf60868c1e90671df5d0cf9be5900a09b ]
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@infradead.org Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/input/touchscreen/wm97xx-core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/input/touchscreen/wm97xx-core.c +++ b/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); }