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 749D53AD51F 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=iMWbIY29/qDQEg50N8TlY+WDd32+W60lHZbwxkIB9KXQyy0BIbeGlMkM7hK5FfrHkhbFxxUTrcXeS+iNbM4dG6scR0H2aL2igAK2ZtU39KZYmn0nVTW0lFVt57rr4kHXZJdeOcBd80Z8h7pOtf+PUdZ8q6wH4y4S/87CY+YLf+E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773912976; c=relaxed/simple; bh=qrYZhBm7vvapeXCeNfgLYOrA28EGANyGRVUbws0YH34=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=f5b2i6qbtPc5yD3hXweYemWn9HDBJHTY0vn7uiPUA4FfeBjIsl7nfjk9A7LPMonJxwnXNWd+ulLRcawGmIyCN4oVHzXEGT9wXkLOfksaQLeDXlr0i72F8wT58Nd1sYkEnNXwRI00sIlE8/UGEunqYVrfm1oK5eb94oZBqO26Yss= 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-0003O9-OQ; 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-0013Dh-0z; 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-0bmI; Thu, 19 Mar 2026 10:36:09 +0100 From: Michael Grzeschik Date: Thu, 19 Mar 2026 10:36:05 +0100 Subject: [PATCH 08/11] tools/usb/p9_fwd: catch if claim_interface is not working 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-v1-8-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=1178; i=m.grzeschik@pengutronix.de; h=from:subject:message-id; bh=qrYZhBm7vvapeXCeNfgLYOrA28EGANyGRVUbws0YH34=; b=owEBbQKS/ZANAwAKAb9pWET5cfSrAcsmYgBpu8OHPLut8Ep/i76pfseXehdynLorUH6l8dqBJ Rir9jAjONKJAjMEAAEKAB0WIQQV2+2Fpbqd6fvv0Gi/aVhE+XH0qwUCabvDhwAKCRC/aVhE+XH0 q/xrD/90xBGiCoIFTBL1wI4QVraAS7enBQBHpia1Zs1jXNrjLM5JOxV2IoTeUJ6vY600xmoS+AZ zZxp9Mx0mRxeq6wU3Rw3cvE131WxgVjYqG1frrLq/afFd+t9hzF0sDEDVK7CXZdX56oy/hEkZWJ 8+JY4NZgoaIy8ViKMYm71iriS37KGQimVQ/jC6G2xvy0qPzf12MWF5knbyeV72Gmho44hKGXJM/ w8fP/OZST4AM3ys0ABUDexdb4bjTNWfbuqBayRflHY09EmDU2lJb4K6A88NI87XZXZcVcPBW+QH 5s6Yp10gJ2FhSajf74xY/jkU6fX+bS1bPUioqf9eRyA3+mLVNZ5Dty2ex487pb7bfViI8L7o3FW 2ewrT34OJ+2HcymdFiVmEEZompVlcOnsqQaUgvJ5wYf8XJsCMauYk/9YnPVHRHRiIwvoCciZ537 Wi+OwNPJ6Wn4L62h/vETeWCqzLQX62Of8KSfUZuhWVIvpSNmTVugU3AbUyVoqrh+Gcbi8amkIUN C/sUOWVZUm40fm/NBJjceB6NF8bCaVRyQJ6zjgg7tZ30Y/x0RjCAz1L2416aBV4/JEyPJ1F0O7Q Ng1PqQua6XgOFGGSv0l678HFTNZozIDZ7MaeB6vQFEeIu2C795zzHEh9lIWMB/0ClF2BpsqzyxR c0Cv7YivWGwsP3Q== 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 It is possible that some other tool was already claiming the interface. Bail out gracefully if this happens. Signed-off-by: Michael Grzeschik --- tools/usb/p9_fwd.py | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/usb/p9_fwd.py b/tools/usb/p9_fwd.py index 12c76cbb046b7277bdd0ec39b663a041c9a1fc89..6a0104935ee995ec4159e27e1cf= b7d93db422a33 100755 --- a/tools/usb/p9_fwd.py +++ b/tools/usb/p9_fwd.py @@ -79,7 +79,13 @@ class Forwarder: raise ValueError("Interface not found") =20 logging.info(f"claiming interface:\n{usb9pfs}") - usb.util.claim_interface(dev, usb9pfs.bInterfaceNumber) + try: + usb.util.claim_interface(dev, usb9pfs.bInterfaceNumber) + except usb.core.USBError as e: + if e.errno =3D=3D errno.EBUSY: + logging.debug("old connection was hanging", repr(e)) + raise ValueError("disconnected") + ep_out =3D usb.util.find_descriptor( usb9pfs, custom_match=3Dlambda e: usb.util.endpoint_direction(e.bEndpoi= ntAddress) =3D=3D usb.util.ENDPOINT_OUT, --=20 2.47.3