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auxdisplay: panel: need to delete scan_timer when misc_register fails in panel_attach

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[ Upstream commit b33d567560 ]

In panel_attach, if misc_register fails, we need to delete scan_timer,
which was setup in keypad_init->init_scan_timer.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: zhengbin <zhengbin13@huawei.com>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
zhengbin 2019-07-08 20:42:18 +08:00 • committed by Greg Kroah-Hartman
commit 377ebe613e
1 changed files with 2 additions and 0 deletions
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drivers/auxdisplay/panel.c
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@ -1618,6 +1618,8 @@ static void panel_attach(struct parport *port)
return;
err_lcd_unreg:
if (scan_timer.function)
del_timer_sync(&scan_timer);
if (lcd.enabled)
charlcd_unregister(lcd.charlcd);
err_unreg_device: