usb: dwc3: drop EP0_STALL state

Whenever we issue a Set Stall command on EP0,
the state machine will be restarted and Stall
is cleared automatically, when core receives
the next SETUP packet.

There's no need to track that EP0_STALL state.

Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index b5d95f8329f..0c934a195de 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -872,8 +872,14 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value)
         memset(&params, 0x00, sizeof(params));
 
         if (value) {
-                if (dep->number == 0 || dep->number == 1)
-                        dwc->ep0state = EP0_STALL;
+                if (dep->number == 0 || dep->number == 1) {
+                        /*
+                         * Whenever EP0 is stalled, we will restart
+                         * the state machine, thus moving back to
+                         * Setup Phase
+                         */
+                        dwc->ep0state = EP0_SETUP_PHASE;
+                }
 
                 ret = dwc3_send_gadget_ep_cmd(dwc, dep->number,
                         DWC3_DEPCMD_SETSTALL, &params);