From nobody Mon Apr 6 15:41:25 2026 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 9082E3B0AD6 for ; Thu, 19 Mar 2026 09:36:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773912976; cv=none; b=bNgLp3baQugEKUcynkV2fWAIE89ku48RnFdJWMcSu6x/eIPTFMp6iIKWUztO0WjFPE/3Y4RIzpkf8Xp+PldM1Hu2mFHpq4IG0nVTNU4Jj5ARP+6WyOdmo75/g8U2SxrUWKPJvzJhqoVJrRIQ7L3msVfUUM+dv5fHErMcPoVrbZ8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773912976; c=relaxed/simple; bh=Xq09yPRW6ohQAn07W4V0qGHQ9lBgXxpNslpiZG9nZXM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=bEB1GnWndkUirnqX7Z19YwChbRNjJ4EaDkp2XAGJDCbNwmXZ1Lx4UYNlyYgXS8UemHoXnkSNdOUf7SAQ5xHU6so4wCP/YmpVYPczK5pZUZz5DfK/P3IDHIO07rAS0529QnVDJFiVrxsmfhrxHfGo8lgBTZyutbgjcJmq5DEH2NU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1w39nV-0003O6-OP; Thu, 19 Mar 2026 10:36:09 +0100 Received: from dude04.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::ac] helo=dude04) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1w39nV-0013De-0u; Thu, 19 Mar 2026 10:36:09 +0100 Received: from [::1] (helo=dude04.red.stw.pengutronix.de) by dude04 with esmtp (Exim 4.98.2) (envelope-from ) id 1w39nV-00000008yzO-0aKO; Thu, 19 Mar 2026 10:36:09 +0100 From: Michael Grzeschik Date: Thu, 19 Mar 2026 10:36:03 +0100 Subject: [PATCH 06/11] net/9p/usbg: add timeout for usbg_request Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260319-9pfixes-v1-6-c977a7433185@pengutronix.de> References: <20260319-9pfixes-v1-0-c977a7433185@pengutronix.de> In-Reply-To: <20260319-9pfixes-v1-0-c977a7433185@pengutronix.de> To: Eric Van Hensbergen , Latchesar Ionkov , Dominique Martinet , Christian Schoenebeck , Greg Kroah-Hartman , Hyungjung Joo Cc: v9fs@lists.linux.dev, linux-kernel@vger.kernel.org, kernel@pengutronix.de, Michael Grzeschik X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1300; i=m.grzeschik@pengutronix.de; h=from:subject:message-id; bh=Xq09yPRW6ohQAn07W4V0qGHQ9lBgXxpNslpiZG9nZXM=; b=owEBbQKS/ZANAwAKAb9pWET5cfSrAcsmYgBpu8OHh3WiaQwDjw4Vd68NNiRlTlCjlHK2JdGwC Zg/bZFkTdOJAjMEAAEKAB0WIQQV2+2Fpbqd6fvv0Gi/aVhE+XH0qwUCabvDhwAKCRC/aVhE+XH0 q6caD/9wMuD9d4l9JyD2q2yYo0UKUHFrwx/ZZt75DsBO6XrvXU/L80gTojK9II0pfqXiFCmSiAq GCQLkLh73RCCGm+hq/K37lVywLxYaeGMTDmZy/3aeoeQ6DWkFz3P9sRA1vrUQ2/J8Cvy2ATmlO/ ZN8+jOICtnhGvtPKE35J1W8HzMQmw4gFCpsaU8H6VAVz6NS1jWjKm0lf99tTFwT5QHTdbLnWI7a avhUycSGYIZQ4Vq1jOsWZ47nXUdbjjSTTVlsGfHBa3DlrAGTTGXzPKpaziXf24lDc9pbxzZdJug tSbiUTgBJkuge1YnLIacAdGerQYM50s3ZaEIxaG8EfEuyu1Iyy2CExuXttR2RR+nqQYU6Exk2cE rBx47tftR3J9XzBBudclq/s18ipIwC/yVJkJFAGQi+In8fGG+jdHiaBHOA4hI6UuapSyq5gMgEA 0DD8DKMYuVCgHN1Dwmysnm1bUU935XbEpwP+UjMB7Vf6LUHZl8uVqJd+m9uM+eX0KkKFpRKjyMe f2hpOoObORizpFoTE3/TvOGV3pEf/Lzoz+S3VK436eedFF+rQLLHhnrKF5P+pf7c25cPeJcOK6b gULzl6dKYBWFRGoI0k9MXSTUs7OWdTqblQ2+p8J/SIoF0L5+CF8lNB8m/c9OmRABKZPkM4FMcqt mG4KW3O/ik132HA== X-Developer-Key: i=m.grzeschik@pengutronix.de; a=openpgp; fpr=957BC452CE953D7EA60CF4FC0BE9E3157A1E2C64 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: m.grzeschik@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Move to wait_for_completion_killable_timeout to ensure that a pending mount will not hang in there forever. If the host side is not available after some time, the pending mount will come back with -ETIMEDOUT. Signed-off-by: Michael Grzeschik --- net/9p/trans_usbg.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/net/9p/trans_usbg.c b/net/9p/trans_usbg.c index 472f7452794d7ac0f7b1475f0da2f4605a28e062..c764e06ad4bf7ef7266160b0606= 3a4a98226649c 100644 --- a/net/9p/trans_usbg.c +++ b/net/9p/trans_usbg.c @@ -502,14 +502,21 @@ static void p9_usbg_close(struct p9_client *client) static int p9_usbg_request(struct p9_client *client, struct p9_req_t *p9_r= eq) { struct f_usb9pfs *usb9pfs =3D client->trans; + struct usb_composite_dev *cdev =3D + usb9pfs->function.config->cdev; int ret; =20 if (client->status !=3D Connected) return -EBUSY; =20 - ret =3D wait_for_completion_killable(&usb9pfs->send); - if (ret) + ret =3D wait_for_completion_killable_timeout(&usb9pfs->send, HZ * 10); + if (ret < 0) return ret; + if (!ret) { + dev_err(&cdev->gadget->dev, + "timeout while transferring 9p via usb\n"); + return -ETIMEDOUT; + } =20 ret =3D usb9pfs_transmit(usb9pfs, p9_req); if (ret) --=20 2.47.3