usb: dwc3: qcom: skip interconnect init for ACPI probe

commit 5e4010e36a58978e42b2ee13739ff9b50209c830 upstream.

The ACPI probe starts failing since commit bea46b981515 ("usb: dwc3:
qcom: Add interconnect support in dwc3 driver"), because there is no
interconnect support for ACPI, and of_icc_get() call in
dwc3_qcom_interconnect_init() will just return -EINVAL.

Fix the problem by skipping interconnect init for ACPI probe, and then
the NULL icc_path_ddr will simply just scheild all ICC calls.

Fixes: bea46b981515 ("usb: dwc3: qcom: Add interconnect support in dwc3 driver")
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210311060318.25418-1-shawn.guo@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index c00c4fa..8bd077f 100644 (file)
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -244,6 +244,9 @@ static int dwc3_qcom_interconnect_init(struct dwc3_qcom *qcom)
        struct device *dev = qcom->dev;
        int ret;
 
+       if (has_acpi_companion(dev))
+               return 0;
+
        qcom->icc_path_ddr = of_icc_get(dev, "usb-ddr");
        if (IS_ERR(qcom->icc_path_ddr)) {
                dev_err(dev, "failed to get usb-ddr path: %ld\n",