usb: dwc3: Fix an IS_ERR() vs NULL check in dwc3_power_off_all_roothub_ports()

The ioremap() function doesn't return error pointers, it returns NULL on
error.  Update the check.

Fixes: 2d2a3349521d ("usb: dwc3: Add workaround for host mode VBUS glitch when boot")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/71499112-4ed3-489a-9a56-b4a8ab89cd05@moroto.mountain
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index ae189b7a4f8b807342a654f1bb89895a91b6bb3f..4e6239d3a0ac25abdb0e2ae3331dde6fe3a03373 100644 (file)
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -35,7 +35,7 @@ static void dwc3_power_off_all_roothub_ports(struct dwc3 *dwc)
        /* xhci regs is not mapped yet, do it temperary here */
        if (dwc->xhci_resources[0].start) {
                xhci_regs = ioremap(dwc->xhci_resources[0].start, DWC3_XHCI_REGS_END);
-               if (IS_ERR(xhci_regs)) {
+               if (!xhci_regs) {
                        dev_err(dwc->dev, "Failed to ioremap xhci_regs\n");
                        return;
                }