usb: dwc3: qcom: Honor wakeup enabled/disabled state

commit 2664deb0930643149d61cddbb66ada527ae180bd upstream.

The dwc3-qcom currently enables wakeup interrupts unconditionally
when suspending, however this should not be done when wakeup is
disabled (e.g. through the sysfs attribute power/wakeup). Only
enable wakeup interrupts when device_may_wakeup() returns true.

Fixes: a4333c3a6ba9 ("usb: dwc3: Add Qualcomm DWC3 glue driver")
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210302103659.v2.1.I44954d9e1169f2cf5c44e6454d357c75ddfa99a2@changeid
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 55f5621..c00c4fa 100644 (file)
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -358,8 +358,10 @@ static int dwc3_qcom_suspend(struct dwc3_qcom *qcom)
        if (ret)
                dev_warn(qcom->dev, "failed to disable interconnect: %d\n", ret);
 
+       if (device_may_wakeup(qcom->dev))
+               dwc3_qcom_enable_interrupts(qcom);
+
        qcom->is_suspended = true;
-       dwc3_qcom_enable_interrupts(qcom);
 
        return 0;
 }
@@ -372,7 +374,8 @@ static int dwc3_qcom_resume(struct dwc3_qcom *qcom)
        if (!qcom->is_suspended)
                return 0;
 
-       dwc3_qcom_disable_interrupts(qcom);
+       if (device_may_wakeup(qcom->dev))
+               dwc3_qcom_disable_interrupts(qcom);
 
        for (i = 0; i < qcom->num_clocks; i++) {
                ret = clk_prepare_enable(qcom->clks[i]);