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usb: dwc3: gadget: Skip waiting for CMDACT cleared during endxfer

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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>
Link: https://lore.kernel.org/r/20220901193625.8727-5-quic_wcheng@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wesley Cheng 2022-09-01 12:36:24 -07:00 committed by Greg Kroah-Hartman
parent 461ee46750
commit b353eb6dc2
1 changed files with 3 additions and 1 deletions
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4
drivers/usb/dwc3/gadget.c
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@ -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;
}