The ioremap() was never unmapped in the probe error handling or in the
remove function.  The fix is to use the devm_ioremap() function so it
gets cleaned up automatically.
Fixes: 70f59c90c819 ("staging: spmi: add Hikey 970 SPMI controller driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200918143338.GE909725@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
                return -EINVAL;
        }
 
-       spmi_controller->base = ioremap(iores->start, resource_size(iores));
+       spmi_controller->base = devm_ioremap(&pdev->dev, iores->start,
+                                            resource_size(iores));
        if (!spmi_controller->base) {
                dev_err(&pdev->dev, "can not remap base addr!\n");
                return -EADDRNOTAVAIL;