[PATCH v2] usb: dwc3: qcom: Honor wakeup enabled/disabled state

[PATCH v2] usb: dwc3: qcom: Honor wakeup enabled/disabled state

[Matthias Kaehlcke]

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")
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

Changes in v2:
- rebased on top of v5.12-rc1

 drivers/usb/dwc3/dwc3-qcom.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 846a47be6df7..a8ae5cf46f1e 100644
--- 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]);
-- 
2.30.1.766.gb4fecdf3b7-goog