linux-kernel - [PATCH] spi: orion: set devdata properly as it is being used later

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Message-ID: <20210408195718.GA3075166@LEGION>
Date:   Fri, 9 Apr 2021 00:57:18 +0500
From:   Muhammad Usama Anjum <musamaanjum@...il.com>
To:     Mark Brown <broonie@...nel.org>, Tian Tao <tiantao6@...ilicon.com>,
        "open list:SPI SUBSYSTEM" <linux-spi@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Cc:     musamaanjum@...il.com, kernel-janitors@...r.kernel.org,
        colin.king@...onical.com, dan.carpenter@...cle.com
Subject: [PATCH] spi: orion: set devdata properly as it is being used later

If device_get_match_data returns NULL, devdata isn't being updated
properly. It is being used later in the function. Both devdata and
spi->devdata should be updated to avoid NULL pointer dereference.

Addresses-Coverity: ("NULL pointer dereference")
Fixes: 0e6521f13c2 ("spi: orion: Use device_get_match_data() helper")
Signed-off-by: Muhammad Usama Anjum <musamaanjum@...il.com>
---
 drivers/spi/spi-orion.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c
index d02c5c9def20..34b31aba3981 100644
--- a/drivers/spi/spi-orion.c
+++ b/drivers/spi/spi-orion.c
@@ -676,7 +676,8 @@ static int orion_spi_probe(struct platform_device *pdev)
 	spi->dev = &pdev->dev;
 
 	devdata = device_get_match_data(&pdev->dev);
-	spi->devdata = devdata ? devdata : &orion_spi_dev_data;
+	devdata = devdata ? devdata : &orion_spi_dev_data;
+	spi->devdata = devdata;
 
 	spi->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(spi->clk)) {
-- 
2.25.1