usb: typec: ucsi: acpi: Workaround for cache mode issue

[mirror_ubuntu-bionic-kernel.git] / drivers / usb / typec / ucsi / ucsi_acpi.c

diff --git a/drivers/usb/typec/ucsi/ucsi_acpi.c b/drivers/usb/typec/ucsi/ucsi_acpi.c
index 44eb4e1ea817b2e38eab36cee60021368508a342..a18112a83faed2df09e49c0a5a93d2fce0823c5f 100644 (file)
--- a/drivers/usb/typec/ucsi/ucsi_acpi.c
+++ b/drivers/usb/typec/ucsi/ucsi_acpi.c
@@ -79,6 +79,11 @@ static int ucsi_acpi_probe(struct platform_device *pdev)
                return -ENODEV;
        }
 
+       /* This will make sure we can use ioremap_nocache() */
+       status = acpi_release_memory(ACPI_HANDLE(&pdev->dev), res, 1);
+       if (ACPI_FAILURE(status))
+               return -ENOMEM;
+
        /*
         * NOTE: The memory region for the data structures is used also in an
         * operation region, which means ACPI has already reserved it. Therefore