From 4dc0b17c61a287f20cf6f17b43ea4ff907194594 Mon Sep 17 00:00:00 2001 From: Thinh Nguyen Date: Wed, 12 Mar 2025 22:51:00 +0900 Subject: [PATCH] usb: dwc3: ep0: Don't clear ep0 DWC3_EP_TRANSFER_STARTED BugLink: https://bugs.launchpad.net/bugs/2102118 [ 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 Link: https://lore.kernel.org/r/d3d618185fd614bb7426352a9fc1199641d3b5f5.1731545781.git.Thinh.Nguyen@synopsys.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin Signed-off-by: Koichiro Den Signed-off-by: Stefan Bader --- 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 371662a55253..69d98f1938ed 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;