linux-kernel - [PATCH 4.12 110/196] serial: st-asc: Potential error pointer dereference

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Date:   Tue, 25 Jul 2017 12:21:49 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 4.12 110/196] serial: st-asc: Potential error pointer dereference

4.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 2b01bfaeb41e1563322448d9b392ac924cbf22ef upstream.

It looks like we intended to return an error code here, because we
dereference "ascport->pinctrl" on the next lines.

Fixes: 6929cb00a501 ("serial: st-asc: Read in all Pinctrl states")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Acked-by: Lee Jones <lee.jones@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/tty/serial/st-asc.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/tty/serial/st-asc.c
+++ b/drivers/tty/serial/st-asc.c
@@ -758,6 +758,7 @@ static int asc_init_port(struct asc_port
 	if (IS_ERR(ascport->pinctrl)) {
 		ret = PTR_ERR(ascport->pinctrl);
 		dev_err(&pdev->dev, "Failed to get Pinctrl: %d\n", ret);
+		return ret;
 	}
 
 	ascport->states[DEFAULT] =