# \[PATCH\] usb: phy: check the return value of ioremap() in usb\_otg\_start() - From: \ - Date: 2022-07-22 03:20:33 - List: linux-usb - Page: https://ratatoskr.run/linux-usb/2022/07/1868898 - Thread: https://ratatoskr.run/linux-usb/2022/07/1868898/t.md ```text From: William Dean The function ioremap() in usb_otg_start() can fail, so its return value should be checked. Fixes: 0807c500a1a6d ("USB: add Freescale USB OTG Transceiver driver") Reported-by: Hacash Robot Signed-off-by: William Dean --- drivers/usb/phy/phy-fsl-usb.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/phy/phy-fsl-usb.c b/drivers/usb/phy/phy-fsl-usb.c index 972704262b02..21b3b2d57358 100644 --- a/drivers/usb/phy/phy-fsl-usb.c +++ b/drivers/usb/phy/phy-fsl-usb.c @@ -855,6 +855,8 @@ int usb_otg_start(struct platform_device *pdev) * with host/device */ usb_dr_regs = ioremap(res->start, sizeof(struct usb_dr_mmap)); + if (!usb_dr_regs) + return -ENOMEM; p_otg->dr_mem_map = (struct usb_dr_mmap *)usb_dr_regs; pdata->regs = (void *)usb_dr_regs; -- 2.25.1 ```