From: Wesley Cheng wcheng@codeaurora.org
commit a1383b3537a7bea1c213baa7878ccc4ecf4413b5 upstream.
usb_gadget_deactivate/usb_gadget_activate does not execute the UDC start operation, which may leave EP0 disabled and event IRQs disabled when re-activating the function. Move the enabling/disabling of USB EP0 and device event IRQs to be performed in the pullup routine.
Fixes: ae7e86108b12 ("usb: dwc3: Stop active transfers before halting the controller") Tested-by: Michael Tretter m.tretter@pengutronix.de Cc: stable stable@vger.kernel.org Reported-by: Michael Tretter m.tretter@pengutronix.de Signed-off-by: Wesley Cheng wcheng@codeaurora.org Link: https://lore.kernel.org/r/1609282837-21666-1-git-send-email-wcheng@codeauror... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/dwc3/gadget.c | 14 +++----------- 1 file changed, 3 insertions(+), 11 deletions(-)
--- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2083,6 +2083,7 @@ static int dwc3_gadget_run_stop(struct d
static void dwc3_gadget_disable_irq(struct dwc3 *dwc); static void __dwc3_gadget_stop(struct dwc3 *dwc); +static int __dwc3_gadget_start(struct dwc3 *dwc);
static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) { @@ -2145,6 +2146,8 @@ static int dwc3_gadget_pullup(struct usb dwc->ev_buf->lpos = (dwc->ev_buf->lpos + count) % dwc->ev_buf->length; } + } else { + __dwc3_gadget_start(dwc); }
ret = dwc3_gadget_run_stop(dwc, is_on, false); @@ -2319,10 +2322,6 @@ static int dwc3_gadget_start(struct usb_ }
dwc->gadget_driver = driver; - - if (pm_runtime_active(dwc->dev)) - __dwc3_gadget_start(dwc); - spin_unlock_irqrestore(&dwc->lock, flags);
return 0; @@ -2348,13 +2347,6 @@ static int dwc3_gadget_stop(struct usb_g unsigned long flags;
spin_lock_irqsave(&dwc->lock, flags); - - if (pm_runtime_suspended(dwc->dev)) - goto out; - - __dwc3_gadget_stop(dwc); - -out: dwc->gadget_driver = NULL; spin_unlock_irqrestore(&dwc->lock, flags);