diff mbox series

[v8,4/5] usb: dwc3: gadget: Skip waiting for CMDACT cleared during endxfer

Message ID 20220901193625.8727-5-quic_wcheng@quicinc.com
State New
Headers show
Series [v8,1/5] usb: dwc3: Avoid unmapping USB requests if endxfer is not complete | expand

Commit Message

Wesley Cheng Sept. 1, 2022, 7:36 p.m. UTC 
For endxfer commands that do not require an endpoint complete interrupt,
avoid having to wait for the command active bit to clear.  This allows for
EP0 events to continue to be handled, which allows for the controller to
complete it.  Otherwise, it is known that the endxfer command will fail if
there is a pending SETUP token that needs to be read.

Suggested-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Reviewed-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
---
 drivers/usb/dwc3/gadget.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index c9310645701d..4721561e4ba5 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -366,7 +366,9 @@  int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned int cmd,
 
 	dwc3_writel(dep->regs, DWC3_DEPCMD, cmd);
 
-	if (!(cmd & DWC3_DEPCMD_CMDACT)) {
+	if (!(cmd & DWC3_DEPCMD_CMDACT) ||
+		(DWC3_DEPCMD_CMD(cmd) == DWC3_DEPCMD_ENDTRANSFER &&
+		!(cmd & DWC3_DEPCMD_CMDIOC))) {
 		ret = 0;
 		goto skip_status;
 	}