linux-kernel - [PATCH v2] media: st-mipid02: add a check for devm_gpiod_get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <20191018014656.5563-1-hslester96@gmail.com>
Date:   Fri, 18 Oct 2019 09:46:56 +0800
From:   Chuhong Yuan <hslester96@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Mickael Guene <mickael.guene@...com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Chuhong Yuan <hslester96@...il.com>
Subject: [PATCH v2] media: st-mipid02: add a check for devm_gpiod_get_optional

mipid02_probe misses a check for devm_gpiod_get_optional and may miss
the failure.
Add a check to fix the problem.

Signed-off-by: Chuhong Yuan <hslester96@...il.com>
---
Changes in v2:
  - Add an error message.

 drivers/media/i2c/st-mipid02.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/i2c/st-mipid02.c b/drivers/media/i2c/st-mipid02.c
index 81285b8d5cfb..003ba22334cd 100644
--- a/drivers/media/i2c/st-mipid02.c
+++ b/drivers/media/i2c/st-mipid02.c
@@ -971,6 +971,11 @@ static int mipid02_probe(struct i2c_client *client)
 	bridge->reset_gpio = devm_gpiod_get_optional(dev, "reset",
 						     GPIOD_OUT_HIGH);
 
+	if (IS_ERR(bridge->reset_gpio)) {
+		dev_err(dev, "failed to get reset GPIO\n");
+		return PTR_ERR(bridge->reset_gpio);
+	}
+
 	ret = mipid02_get_regulators(bridge);
 	if (ret) {
 		dev_err(dev, "failed to get regulators %d", ret);
-- 
2.20.1