4.19-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit 01c10880d24291a96a4ab0da773e3c5ce4d12da8 ]
We see dwc3 endpoint stopped by unwanted irq during suspend resume test, which is caused dwc3 ep can't be started with error "No Resource".
Here, add synchronize_irq before suspend to sync the pending IRQ handlers complete.
Signed-off-by: Bo He bo.he@intel.com Signed-off-by: Yu Wang yu.y.wang@intel.com Signed-off-by: Felipe Balbi felipe.balbi@linux.intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/dwc3/gadget.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 0db90f6f4aa81..f6cd7feeb1c4f 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -3274,6 +3274,8 @@ int dwc3_gadget_suspend(struct dwc3 *dwc) dwc3_disconnect_gadget(dwc); __dwc3_gadget_stop(dwc);
+ synchronize_irq(dwc->irq_gadget); + return 0; }