linux-kernel - [PATCH] i2c: i2c-stm32f7: fix no check on returned setup

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Message-ID: <1518017678-10283-1-git-send-email-pierre-yves.mordret@st.com>
Date:   Wed, 7 Feb 2018 16:34:38 +0100
From:   Pierre-Yves MORDRET <pierre-yves.mordret@...com>
To:     Wolfram Sang <wsa@...-dreams.de>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        <linux-i2c@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     Pierre-Yves MORDRET <pierre-yves.mordret@...com>
Subject: [PATCH] i2c: i2c-stm32f7: fix no check on returned setup

Before assigning returned setup structure check if not null

Fixes: 463a9215f3ca7600b5ff ("i2c: stm32f7: fix setup structure")
Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@...com>
---
  Version history:
     v1:
         * Initial
---
---
 drivers/i2c/busses/i2c-stm32f7.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index b445b3b..16c7d77 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -888,6 +888,10 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
 	}
 
 	setup = of_device_get_match_data(&pdev->dev);
+	if (!setup) {
+		dev_err(&pdev->dev, "Can't get device data\n");
+		goto clk_free;
+	}
 	i2c_dev->setup = *setup;
 
 	ret = device_property_read_u32(i2c_dev->dev, "i2c-scl-rising-time-ns",
-- 
2.7.4