linux-kernel - [PATCH] auxdisplay: panel: need to delete scan_timer when misc_register fails in panel

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Date:   Mon, 8 Jul 2019 20:42:18 +0800
From:   zhengbin <zhengbin13@...wei.com>
To:     <willy@...roxy.com>, <ksenija.stanojevic@...il.com>,
        <miguel.ojeda.sandonis@...il.com>, <linux-kernel@...r.kernel.org>
CC:     <yi.zhang@...wei.com>, <zhengbin13@...wei.com>
Subject: [PATCH] auxdisplay: panel: need to delete scan_timer when misc_register fails in panel_attach

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@...wei.com>
Signed-off-by: zhengbin <zhengbin13@...wei.com>
---
 drivers/auxdisplay/panel.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/auxdisplay/panel.c b/drivers/auxdisplay/panel.c
index e06de63..e6bd727 100644
--- a/drivers/auxdisplay/panel.c
+++ b/drivers/auxdisplay/panel.c
@@ -1617,6 +1617,8 @@ 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:
--
2.7.4