linux-kernel - [PATCH 5.14 299/334] auxdisplay: hd44780: Fix oops on module unloading

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Date:   Mon, 13 Sep 2021 15:15:53 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Lars Poeschel <poeschel@...onage.de>,
        Miguel Ojeda <ojeda@...nel.org>
Subject: [PATCH 5.14 299/334] auxdisplay: hd44780: Fix oops on module unloading

From: Lars Poeschel <poeschel@...onage.de>

commit 333ff32d54cdefc2e479892e7f15ac91e026b57d upstream.

Fixes: 718e05ed92ec ("auxdisplay: Introduce hd44780_common.[ch]")
Cc: stable@...r.kernel.org
Link: https://lore.kernel.org/lkml/CAHp75VfKyqy+vM0XkP9Yb+znGOTVT4zYCRY3A3nQ7C3WNUVN0g@mail.gmail.com/
Reported-By: Andy Shevchenko <andy.shevchenko@...il.com>
Signed-off-by: Lars Poeschel <poeschel@...onage.de>
Tested-by: Andy Shevchenko <andy.shevchenko@...il.com>
[added Link, Fixes, Cc stable tags, edited message]
Signed-off-by: Miguel Ojeda <ojeda@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/auxdisplay/hd44780.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/auxdisplay/hd44780.c
+++ b/drivers/auxdisplay/hd44780.c
@@ -323,8 +323,8 @@ static int hd44780_remove(struct platfor
 {
 	struct charlcd *lcd = platform_get_drvdata(pdev);
 
-	kfree(lcd->drvdata);
 	charlcd_unregister(lcd);
+	kfree(lcd->drvdata);
 
 	kfree(lcd);
 	return 0;