linux-kernel - [PATCH] serial: 8250: dw: Fix NULL pointer dereference

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Date:   Mon,  2 May 2022 14:56:21 +0300
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Emil Renner Berthing <kernel@...il.dk>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] serial: 8250: dw: Fix NULL pointer dereference

dw8250_platform_data is only used on DT platforms for now.

Fixes: 4a218b277fdb ("serial: 8250: dw: Create a generic platform data structure")
Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
---
Hi,

I'm sorry, I have to resend this (to you guys).
I left out the mailing lists.

Br,
---
 drivers/tty/serial/8250/8250_dw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index 0cf1a99dc1244..31422e44c64ff 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -433,9 +433,9 @@ static void dw8250_prepare_rx_dma(struct uart_8250_port *p)
 static void dw8250_quirks(struct uart_port *p, struct dw8250_data *data)
 {
 	struct device_node *np = p->dev->of_node;
-	unsigned int quirks = data->pdata->quirks;
 
 	if (np) {
+		unsigned int quirks = data->pdata->quirks;
 		int id;
 
 		/* get index of serial line, if found in DT aliases */
-- 
2.35.1