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UPSTREAM: 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>

(cherry picked from commit b353eb6dc2)

Bug: 263189538
Change-Id: If34b7ddc2e3ea10ec94afe43e6dba0878da6776f
Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
This commit is contained in:
Wesley Cheng
2022-09-01 12:36:24 -07:00
committed by Todd Kjos
parent 6b23440751
commit e3a5b60c60
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/usb/dwc3/gadget.c
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@@ -367,7 +367,9 @@ 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;
}