diff mbox series

[-next,v2] PCI: dwc: pci-dra7xx: use devm_platform_ioremap_resource_byname()

Message ID 20200429015027.134485-1-weiyongjun1@huawei.com
State New
Headers show
Series [-next,v2] PCI: dwc: pci-dra7xx: use devm_platform_ioremap_resource_byname() | expand

Commit Message

Wei Yongjun April 29, 2020, 1:50 a.m. UTC 
platform_get_resource() may fail and return NULL, so we should better
check it's 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().

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
---
v1 -> v2: use devm_platform_ioremap_resource_byname, suggest by Vignesh
---
 drivers/pci/controller/dwc/pci-dra7xx.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
index 3b0e58f2de58..6184ebc9392d 100644
--- a/drivers/pci/controller/dwc/pci-dra7xx.c
+++ b/drivers/pci/controller/dwc/pci-dra7xx.c
@@ -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) {