summaryrefslogtreecommitdiff
path: root/drivers/usb/dwc3
diff options
context:
space:
mode:
authorWesley Cheng <quic_wcheng@quicinc.com>2022-08-17 21:23:54 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-08-31 10:07:53 +0300
commitdff981842a0b1c05786c4c0cdea3ac80079ddd57 (patch)
treed54d83bc5c740b6b93abc6d8d585ae099f95b2c3 /drivers/usb/dwc3
parent9711c67de7482c81e1daca3548fbc5c9603600e3 (diff)
downloadlinux-dff981842a0b1c05786c4c0cdea3ac80079ddd57.tar.xz
usb: dwc3: gadget: Continue handling EP0 xfercomplete events
During soft disconnect, EP0 events are expected to be handled in order to allow the controller to successfully move into the halted state. Since __dwc3_gadget_stop() is executed before polling, EP0 has been disabled, and events are being blocked. Allow xfercomplete events to be handled, so that cached SETUP packets can be read out from the internal controller memory. Without doing so, it will lead to endxfer timeouts, which results to controller halt failures. Reviewed-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com> Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com> Link: https://lore.kernel.org/r/20220817182359.13550-5-quic_wcheng@quicinc.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc3')
-rw-r--r--drivers/usb/dwc3/gadget.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 311348aea58e..d6c0cb79ace3 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2721,6 +2721,7 @@ static int __dwc3_gadget_start(struct dwc3 *dwc)
dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
dep = dwc->eps[0];
+ dep->flags = 0;
ret = __dwc3_gadget_ep_enable(dep, DWC3_DEPCFG_ACTION_INIT);
if (ret) {
dev_err(dwc->dev, "failed to enable %s\n", dep->name);
@@ -2728,6 +2729,7 @@ static int __dwc3_gadget_start(struct dwc3 *dwc)
}
dep = dwc->eps[1];
+ dep->flags = 0;
ret = __dwc3_gadget_ep_enable(dep, DWC3_DEPCFG_ACTION_INIT);
if (ret) {
dev_err(dwc->dev, "failed to enable %s\n", dep->name);
@@ -3599,11 +3601,12 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc,
dep = dwc->eps[epnum];
if (!(dep->flags & DWC3_EP_ENABLED)) {
- if (!(dep->flags & DWC3_EP_TRANSFER_STARTED))
+ if ((epnum > 1) && !(dep->flags & DWC3_EP_TRANSFER_STARTED))
return;
/* Handle only EPCMDCMPLT when EP disabled */
- if (event->endpoint_event != DWC3_DEPEVT_EPCMDCMPLT)
+ if ((event->endpoint_event != DWC3_DEPEVT_EPCMDCMPLT) &&
+ !(epnum <= 1 && event->endpoint_event == DWC3_DEPEVT_XFERCOMPLETE))
return;
}