diff mbox series

usb: dwc3: ep0: Don't reset resource alloc flag

Message ID 00122b7cc5be06abef461776e7cc9f5ebc8bc1cb.1713229786.git.Thinh.Nguyen@synopsys.com (mailing list archive)
State Accepted
Commit f2e0eee4703869dc5edb5302a919861566ca7797
Headers show
Series usb: dwc3: ep0: Don't reset resource alloc flag | expand

Commit Message

Thinh Nguyen April 16, 2024, 1:23 a.m. UTC 
The DWC3_EP_RESOURCE_ALLOCATED flag ensures that the resource of an
endpoint is only assigned once. Unless the endpoint is reset, don't
clear this flag. Otherwise we may set endpoint resource again, which
prevents the driver from initiate transfer after handling a STALL or
endpoint halt to the control endpoint.

Cc: stable@vger.kernel.org
Fixes: b311048c174d ("usb: dwc3: gadget: Rewrite endpoint allocation flow")
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
---
 drivers/usb/dwc3/ep0.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)


base-commit: c281d18dda402a2d180b921eebc7fe22b76699cf
diff mbox series

Patch

diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 72bb722da2f2..d96ffbe52039 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -226,7 +226,8 @@  void dwc3_ep0_stall_and_restart(struct dwc3 *dwc)
 
 	/* reinitialize physical ep1 */
 	dep = dwc->eps[1];
-	dep->flags = DWC3_EP_ENABLED;
+	dep->flags &= DWC3_EP_RESOURCE_ALLOCATED;
+	dep->flags |= DWC3_EP_ENABLED;
 
 	/* stall is always issued on EP0 */
 	dep = dwc->eps[0];