diff options
| author | Kuen-Han Tsai <khtsai@google.com> | 2025-08-07 17:06:55 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-13 17:17:13 +0200 |
| commit | 58577118cc7cec9eb7c1836bf88f865ff2c5e3a3 (patch) | |
| tree | 1ac1ce0218ccb8fda975dff116cd0d593bfe5595 | |
| parent | 6ca8af3c8fb584f3424a827f554ff74f898c27cd (diff) | |
usb: dwc3: Ignore late xferNotReady event to prevent halt timeout
During a device-initiated disconnect, the End Transfer command resets
the event filter, allowing a new xferNotReady event to be generated
before the controller is fully halted. Processing this late event
incorrectly triggers a Start Transfer, which prevents the controller
from halting and results in a DSTS.DEVCTLHLT bit polling timeout.
Ignore the late xferNotReady event if the controller is already in a
disconnected state.
Fixes: 72246da40f37 ("usb: Introduce DesignWare USB3 DRD Driver")
Cc: stable <stable@kernel.org>
Signed-off-by: Kuen-Han Tsai <khtsai@google.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20250807090700.2397190-1-khtsai@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 25db36c63951..68fa2813e5f4 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -3777,6 +3777,15 @@ static void dwc3_gadget_endpoint_transfer_complete(struct dwc3_ep *dep, static void dwc3_gadget_endpoint_transfer_not_ready(struct dwc3_ep *dep, const struct dwc3_event_depevt *event) { + /* + * During a device-initiated disconnect, a late xferNotReady event can + * be generated after the End Transfer command resets the event filter, + * but before the controller is halted. Ignore it to prevent a new + * transfer from starting. + */ + if (!dep->dwc->connected) + return; + dwc3_gadget_endpoint_frame_from_event(dep, event); /* |