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mtd: rawnand: intel: fix possible null-ptr-deref in ebu_nand_probe()

It will cause null-ptr-deref when using 'res', if platform_get_resource()
returns NULL, so move using 'res' after devm_ioremap_resource() that
will check it to avoid null-ptr-deref.

Fixes: 0b1039f016e8 ("mtd: rawnand: Add NAND controller support on Intel LGM SoC")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220426084913.4021868-2-yangyingliang@huawei.com

authored by

Yang Yingliang and committed by
Miquel Raynal ddf66aef a28ed09d

+1 -1
+1 -1
drivers/mtd/nand/raw/intel-nand-controller.c
··· 619 619 resname = devm_kasprintf(dev, GFP_KERNEL, "nand_cs%d", cs); 620 620 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, resname); 621 621 ebu_host->cs[cs].chipaddr = devm_ioremap_resource(dev, res); 622 - ebu_host->cs[cs].nand_pa = res->start; 623 622 if (IS_ERR(ebu_host->cs[cs].chipaddr)) 624 623 return PTR_ERR(ebu_host->cs[cs].chipaddr); 624 + ebu_host->cs[cs].nand_pa = res->start; 625 625 626 626 ebu_host->clk = devm_clk_get(dev, NULL); 627 627 if (IS_ERR(ebu_host->clk))