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PCI: dwc: pci-dra7xx: Use devm_platform_ioremap_resource_byname()

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platform_get_resource() may fail and return NULL, so we had better
check its return value to avoid a NULL pointer dereference a bit later
in the code. Fix it to use devm_platform_ioremap_resource_byname()
instead of calling platform_get_resource_byname() and devm_ioremap().

Link: https://lore.kernel.org/r/20200429015027.134485-1-weiyongjun1@huawei.com
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
[lorenzo.pieralisi@arm.com: commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Wei Yongjun 2020-04-29 01:50:27 +00:00 committed by Lorenzo Pieralisi
parent 558c1225a2
commit c8a119779f
1 changed files with 3 additions and 5 deletions
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8
drivers/pci/controller/dwc/pci-dra7xx.c
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@ -840,7 +840,6 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
struct phy **phy;
struct device_link **link;
void __iomem *base;
struct resource *res;
struct dw_pcie *pci;
struct dra7xx_pcie *dra7xx;
struct device *dev = &pdev->dev;
@ -877,10 +876,9 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
return irq;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ti_conf");
base = devm_ioremap(dev, res->start, resource_size(res));
if (!base)
return -ENOMEM;
base = devm_platform_ioremap_resource_byname(pdev, "ti_conf");
if (IS_ERR(base))
return PTR_ERR(base);
phy_count = of_property_count_strings(np, "phy-names");
if (phy_count < 0) {