From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
From: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210302103659.v2.1.I44954d9e1169f2cf5c44e6454d357c75ddfa99a2@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/dwc3/dwc3-qcom.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- 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
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_
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]);
