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 5BA3B2FDC5C; Tue, 26 Aug 2025 14:01:54 +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=1756216914; cv=none; b=Jo5WlbXPU6bVjMXLMbngNMeWERNgwv6HpUAAZpzoBNdc+537mVHOjviGEvXHFrReAGcQ98balDAdtz4DfGtlLo/OkAzdvTVGbirbFHl6WCR3zMKu5Ly2RxZ0+XZ4UtFOaB3zdBXSippAn4gBbI9IzKauyA77TubwBATMWz0nO58= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756216914; c=relaxed/simple; bh=jH2TAbOPwN0KHUtWPq5WTx+7fA6IXNxzOHlxa6ysoDU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=P4JWoz45LWaVs2BV7vpSHimKeel2HhuvRE0jPph5rGz8rrooG8lEJSRWVvwuFw7w5WSpgy6HNKOwV3rxNLbZug1ds+jSDI/xSlslSbieBbvFf5qeOKhUBBLhC4837OEl6b9MFCg63jurbu+egi8v+hDKBGYey2MM37aq/P8ND5U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Ba4xY4EP; 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="Ba4xY4EP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E10BAC4CEF1; Tue, 26 Aug 2025 14:01:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756216914; bh=jH2TAbOPwN0KHUtWPq5WTx+7fA6IXNxzOHlxa6ysoDU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ba4xY4EPECKpz1W2ussYsKYsDpTxObESD6D084wh6Eu4MBZdRw8K+6ElCerNOK8LD CS00+zHm2ybAEa3nlj6GTPZadvc60MGu/7Zj1heufujSg8GDqxmdeA6qVpI8tJSbxE KJbyIdKPA8sufVAhnsASy1lLAeeQAQ56K1oJ/Fas= 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 5.15 590/644] usb: dwc3: Ignore late xferNotReady event to prevent halt timeout Date: Tue, 26 Aug 2025 13:11:21 +0200 Message-ID: <20250826111001.156487887@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110946.507083938@linuxfoundation.org> References: <20250826110946.507083938@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 5.15-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 @@ -3534,6 +3534,15 @@ 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); /*