linux-kernel - [PATCH] usb: dwc3: qcom: suppress unused-variable warning

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Date:   Mon, 22 Aug 2022 12:05:50 +0200
From:   Johan Hovold <johan+linaro@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Felipe Balbi <balbi@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Johan Hovold <johan+linaro@...nel.org>,
        kernel test robot <lkp@...el.com>
Subject: [PATCH] usb: dwc3: qcom: suppress unused-variable warning

The dwc3_qcom_read_usb2_speed() helper is now only called when the
controller is acting as host, but the compiler will warn that the hcd
variable is unused in gadget-only W=1 builds.

Fixes: c06795f114a6 ("usb: dwc3: qcom: fix gadget-only builds")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
---
 drivers/usb/dwc3/dwc3-qcom.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index b3ba9aaf876c..8298aebd395e 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -310,7 +310,7 @@ static enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom)
 {
 	struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
 	struct usb_device *udev;
-	struct usb_hcd *hcd;
+	struct usb_hcd __maybe_unused *hcd;
 
 	/*
 	 * FIXME: Fix this layering violation.
-- 
2.35.1