linux-kernel - Re: [PATCH] mtd: fsl-quadspi: possible NULL reference

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Message-ID: <201511170338.tWCuP1tJ%fengguang.wu@intel.com>
Date:	Tue, 17 Nov 2015 03:46:24 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Brian Norris <computersforpeace@...il.com>
Cc:	kbuild-all@...org, linux-mtd@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Brian Norris <computersforpeace@...il.com>,
	Han Xu <han.xu@...escale.com>
Subject: Re: [PATCH] mtd: fsl-quadspi: possible NULL reference

Hi Brian,

[auto build test WARNING on mtd/master]
[also build test WARNING on v4.4-rc1 next-20151116]

url:    https://github.com/0day-ci/linux/commits/Brian-Norris/mtd-fsl-quadspi-possible-NULL-reference/20151117-024430
base:   git://git.infradead.org/linux-mtd.git master
config: i386-allmodconfig (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   drivers/mtd/spi-nor/fsl-quadspi.c: In function 'fsl_qspi_probe':
>> drivers/mtd/spi-nor/fsl-quadspi.c:947:18: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
     q->devtype_data = of_device_get_match_data(dev);
                     ^

vim +/const +947 drivers/mtd/spi-nor/fsl-quadspi.c

   931		struct device *dev = &pdev->dev;
   932		struct fsl_qspi *q;
   933		struct resource *res;
   934		struct spi_nor *nor;
   935		struct mtd_info *mtd;
   936		int ret, i = 0;
   937	
   938		q = devm_kzalloc(dev, sizeof(*q), GFP_KERNEL);
   939		if (!q)
   940			return -ENOMEM;
   941	
   942		q->nor_num = of_get_child_count(dev->of_node);
   943		if (!q->nor_num || q->nor_num > FSL_QSPI_MAX_CHIP)
   944			return -ENODEV;
   945	
   946		q->dev = dev;
 > 947		q->devtype_data = of_device_get_match_data(dev);
   948		if (!q->devtype_data)
   949			return -ENODEV;
   950		platform_set_drvdata(pdev, q);
   951	
   952		/* find the resources */
   953		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "QuadSPI");
   954		q->iobase = devm_ioremap_resource(dev, res);
   955		if (IS_ERR(q->iobase))

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Download attachment ".config.gz" of type "application/octet-stream" (51520 bytes)