6.6-stable review patch. If anyone has any objections, please let me know.
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From: Thinh Nguyen Thinh.Nguyen@synopsys.com
[ Upstream commit 5d2fb074dea289c41f5aaf2c3f68286bee370634 ]
The driver cannot issue the End Transfer command to the SETUP transfer. Don't clear DWC3_EP_TRANSFER_STARTED flag to make sure that the driver won't send Start Transfer command again, which can cause no-resource error. For example this can occur if the host issues a reset to the device.
Cc: stable@vger.kernel.org Fixes: 76cb323f80ac ("usb: dwc3: ep0: clear all EP0 flags") Signed-off-by: Thinh Nguyen Thinh.Nguyen@synopsys.com Link: https://lore.kernel.org/r/d3d618185fd614bb7426352a9fc1199641d3b5f5.173154578... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/dwc3/ep0.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index 371662a552538..69d98f1938edd 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -231,7 +231,7 @@ void dwc3_ep0_stall_and_restart(struct dwc3 *dwc) /* stall is always issued on EP0 */ dep = dwc->eps[0]; __dwc3_gadget_ep_set_halt(dep, 1, false); - dep->flags &= DWC3_EP_RESOURCE_ALLOCATED; + dep->flags &= DWC3_EP_RESOURCE_ALLOCATED | DWC3_EP_TRANSFER_STARTED; dep->flags |= DWC3_EP_ENABLED; dwc->delayed_status = false;