From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2CD04200112; Tue, 26 Aug 2025 13:34:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756215276; cv=none; b=fk9iNwUFBJrf6rlNK/zro/twci/4nPchsdNBWgrYk/V5veQvN0+CP9VkOYGz/RkjpDo4LSHHbGI6Wo6310uRu3pizR24zjE17Fxg3jc/BD3k0s9dzoQ70J0hRMBdqi7RrSGIi2MRbXqelLIDOFUD2eKfMJX6YISDcgb60psq9uM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756215276; c=relaxed/simple; bh=wWwbj8aqHPvAiNTZcspDmBdGCrBAKoWDz2orRmcq0AQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gY4N9NWl+iCQ3MEeoC1DFLbnkr6L/I3oenOVxESxVAFJg99npvosNnB8742oTU4+wgY8RwZWwW0Xc+JCsdmUg1s1YvFrio4uczVkC9XaXL4Zmb6WJPh4clnDgagnQHkfPepE3NzYC06/vvZdovj7Fe6ssaSaPqpABvg81zJnJoI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=D4ZeYPRG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="D4ZeYPRG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B2035C4CEF1; Tue, 26 Aug 2025 13:34:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756215276; bh=wWwbj8aqHPvAiNTZcspDmBdGCrBAKoWDz2orRmcq0AQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D4ZeYPRGXyqh36HoKrX/kviqeUoeQcy0PXGaIPttlZlYn0aKHODTqTjuN2R6uSumr C7Gvpd7S69BruKUwY+TDo/KVrCTfEAf68bSBtq6BKJsrrfVT+k905vOogu+AE373GT OT0BsT8rbOMVf01tFVUAU39i3mMzN7ETZi8U0/pg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Kuen-Han Tsai , Thinh Nguyen Subject: [PATCH 6.1 422/482] usb: dwc3: Ignore late xferNotReady event to prevent halt timeout Date: Tue, 26 Aug 2025 13:11:15 +0200 Message-ID: <20250826110941.253326327@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110930.769259449@linuxfoundation.org> References: <20250826110930.769259449@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Kuen-Han Tsai commit 58577118cc7cec9eb7c1836bf88f865ff2c5e3a3 upstream. 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 Signed-off-by: Kuen-Han Tsai Acked-by: Thinh Nguyen Link: https://lore.kernel.org/r/20250807090700.2397190-1-khtsai@google.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/gadget.c | 9 +++++++++ 1 file changed, 9 insertions(+) --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -3590,6 +3590,15 @@ static void dwc3_gadget_endpoint_transfe 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); /*