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Input: wm97xx-ts - fix exit path

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[ Upstream commit a3f7c3fcf6 ]

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: ae9d1b5fbd ("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>
This commit is contained in:
Randy Dunlap 2018-10-15 11:16:58 -07:00 committed by Greg Kroah-Hartman
parent 139dde1e96
commit d7dba42c38
1 changed files with 2 additions and 1 deletions
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3
drivers/input/touchscreen/wm97xx-core.c
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@ -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);
}