linux-kernel - [PATCH v2] console: console: Complete exception handling in newport

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Date:   Thu, 23 Apr 2020 22:26:27 +0800
From:   Dejin Zheng <zhengdejin5@...il.com>
To:     gregkh@...uxfoundation.org, tglx@...utronix.de,
        FlorianSchandinat@....de, b.zolnierkie@...sung.com,
        ralf@...ux-mips.org, tsbogend@...ha.franken.de,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Dejin Zheng <zhengdejin5@...il.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: [PATCH v2] console: console: Complete exception handling in newport_probe()

A call of the function ¡°do_take_over_console¡± can fail here.
The corresponding system resources were not released then.
Thus add a call of the function ¡°iounmap¡± together with the check
of a failure predicate.

Fixes: e84de0c6190503 ("MIPS: GIO bus support for SGI IP22/28")
CC: Andy Shevchenko <andy.shevchenko@...il.com>
Signed-off-by: Dejin Zheng <zhengdejin5@...il.com>
---
v1 -> v2:
	- modify the commit comments by Markus'suggestion.

 drivers/video/console/newport_con.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/video/console/newport_con.c b/drivers/video/console/newport_con.c
index 00dddf6e08b0..6bfc8e3ffd4a 100644
--- a/drivers/video/console/newport_con.c
+++ b/drivers/video/console/newport_con.c
@@ -720,6 +720,9 @@ static int newport_probe(struct gio_device *dev,
 	console_lock();
 	err = do_take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
 	console_unlock();
+
+	if (err)
+		iounmap((void *)npregs);
 	return err;
 }
 
-- 
2.25.0