From: Chuhong Yuan <hslester96@gmail.com>
Cc: devel@driverdev.osuosl.org, Fabio Estevam <festevam@gmail.com>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Chuhong Yuan <hslester96@gmail.com>,
linux-kernel@vger.kernel.org, Rui Miguel Silva <rmfrfs@gmail.com>,
NXP Linux Team <linux-imx@nxp.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
Steve Longerbeam <slongerbeam@gmail.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Shawn Guo <shawnguo@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org
Subject: [PATCH] media: imx7-mipi-csis: Add a check for devm_regulator_get
Date: Mon, 14 Oct 2019 10:08:48 +0800 [thread overview]
Message-ID: <20191014020847.9203-1-hslester96@gmail.com> (raw)
devm_regulator_get may return an error but mipi_csis_phy_init misses
a check for it.
This may lead to problems when regulator_set_voltage uses the unchecked
pointer.
This patch adds a check for devm_regulator_get to avoid potential risk.
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
---
drivers/staging/media/imx/imx7-mipi-csis.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c b/drivers/staging/media/imx/imx7-mipi-csis.c
index 73d8354e618c..9a07b54c4ab1 100644
--- a/drivers/staging/media/imx/imx7-mipi-csis.c
+++ b/drivers/staging/media/imx/imx7-mipi-csis.c
@@ -350,6 +350,8 @@ static void mipi_csis_sw_reset(struct csi_state *state)
static int mipi_csis_phy_init(struct csi_state *state)
{
state->mipi_phy_regulator = devm_regulator_get(state->dev, "phy");
+ if (IS_ERR(state->mipi_phy_regulator))
+ return PTR_ERR(state->mipi_phy_regulator);
return regulator_set_voltage(state->mipi_phy_regulator, 1000000,
1000000);
--
2.20.1
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next reply other threads:[~2019-10-14 2:10 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-14 2:08 Chuhong Yuan [this message]
2019-10-15 8:42 ` [PATCH] media: imx7-mipi-csis: Add a check for devm_regulator_get Rui Miguel Silva
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