[PATCH 1/2] phy: usb: Fix potential NULL dereference in sp_usb_phy_probe()

[Sun Ke]

platform_get_resource_byname() 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.

Fixes: 99d9ccd97385 ("phy: usb: Add USB2.0 phy driver for Sunplus SP7021")
Signed-off-by: Sun Ke <sunke32 at huawei.com>
---
 drivers/phy/sunplus/phy-sunplus-usb2.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/phy/sunplus/phy-sunplus-usb2.c b/drivers/phy/sunplus/phy-sunplus-usb2.c
index 5269968b3060..d73a8a421d9c 100644
--- a/drivers/phy/sunplus/phy-sunplus-usb2.c
+++ b/drivers/phy/sunplus/phy-sunplus-usb2.c
@@ -249,11 +249,15 @@ static int sp_usb_phy_probe(struct platform_device *pdev)
 	usbphy->dev = &pdev->dev;
 
 	usbphy->phy_res_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
+	if (!usbphy->phy_res_mem)
+		return -EINVAL;
 	usbphy->phy_regs = devm_ioremap_resource(&pdev->dev, usbphy->phy_res_mem);
 	if (IS_ERR(usbphy->phy_regs))
 		return PTR_ERR(usbphy->phy_regs);
 
 	usbphy->moon4_res_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "moon4");
+	if (!usbphy->moon4_res_mem)
+		return -EINVAL;
 	usbphy->moon4_regs = devm_ioremap(&pdev->dev, usbphy->moon4_res_mem->start,
 					  resource_size(usbphy->moon4_res_mem));
 	if (IS_ERR(usbphy->moon4_regs))
-- 
2.31.1