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UPSTREAM: usb: dwc3: gadget: Submit endxfer command if delayed during disconnect

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During a cable disconnect sequence, if ep0state is not in the SETUP phase,
then nothing will trigger any pending end transfer commands.  Force
stopping of any pending SETUP transaction, and move back to the SETUP
phase.

Reviewed-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
Link: https://lore.kernel.org/r/20220901193625.8727-6-quic_wcheng@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

(cherry picked from commit 8422b769fa)

Bug: 258997352
Change-Id: I39f41c42d3c5aec76d4f65175e31e2e10a0825be
Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
This commit is contained in:
Krishna Kurapati
2022-11-14 11:18:30 +05:30
committed by Treehugger Robot
parent 910e9e6049
commit a8997cb185
1 changed files with 12 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/usb/dwc3/gadget.c
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@@ -3744,13 +3744,24 @@ static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc)
reg &= ~DWC3_DCTL_INITU2ENA;
dwc3_gadget_dctl_write_safe(dwc, reg);
dwc->connected = false;
dwc3_disconnect_gadget(dwc);
dwc->gadget->speed = USB_SPEED_UNKNOWN;
dwc->setup_packet_pending = false;
usb_gadget_set_state(dwc->gadget, USB_STATE_NOTATTACHED);
dwc->connected = false;
if (dwc->ep0state != EP0_SETUP_PHASE) {
unsigned int dir;
dir = !!dwc->ep0_expect_in;
if (dwc->ep0state == EP0_DATA_PHASE)
dwc3_ep0_end_control_data(dwc, dwc->eps[dir]);
else
dwc3_ep0_end_control_data(dwc, dwc->eps[!dir]);
dwc3_ep0_stall_and_restart(dwc);
}
}
static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc)