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x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=kernel.org header.result=pass header_is_org_domain=yes Authentication-Results: mx6.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=kernel.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); smime=temperror; spf=none smtp.mailfrom=linux-usb-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=orgdomain_pass; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=kernel.org header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752028AbeB1HyN (ORCPT ); Wed, 28 Feb 2018 02:54:13 -0500 Received: from mga02.intel.com ([134.134.136.20]:31978 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750846AbeB1HyM (ORCPT ); Wed, 28 Feb 2018 02:54:12 -0500 X-Amp-Result: UNSCANNABLE X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.47,404,1515484800"; d="asc'?scan'208";a="31240030" From: Felipe Balbi To: Roger Quadros Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Roger Quadros Subject: Re: [PATCH] usb: dwc3: Prevent indefinite sleep in _dwc3_set_mode during suspend/resume In-Reply-To: <1519730526-22274-1-git-send-email-rogerq@ti.com> References: <1519730526-22274-1-git-send-email-rogerq@ti.com> Date: Wed, 28 Feb 2018 09:53:14 +0200 Message-ID: <87sh9l5z4l.fsf@linux.intel.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha512; protocol="application/pgp-signature" Sender: linux-usb-owner@vger.kernel.org X-Mailing-List: linux-usb@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: --=-=-= Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Hi, Roger Quadros writes: > In the following test we get stuck by sleeping forever in _dwc3_set_mode() > after which dual-role switching doesn't work. > > On dra7-evm's dual-role port, > - Load g_zero gadget driver and enumerate to host > - suspend to mem > - disconnect USB cable to host and connect otg cable with Pen drive in it. > - resume system > - we sleep indefinitely in _dwc3_set_mode due to. > dwc3_gadget_exit()->usb_del_gadget_udc()->udc_stop()-> > dwc3_gadget_stop()->wait_event_lock_irq() > > Let's clear the DWC3_EP_END_TRANSFER_PENDING flag on all endpoints > so we don't wait in dwc3_gadget_stop(). > > Signed-off-by: Roger Quadros > --- > drivers/usb/dwc3/gadget.c | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c > index 2bda4eb..0a360da 100644 > --- a/drivers/usb/dwc3/gadget.c > +++ b/drivers/usb/dwc3/gadget.c > @@ -3273,6 +3273,20 @@ int dwc3_gadget_init(struct dwc3 *dwc) >=20=20 > void dwc3_gadget_exit(struct dwc3 *dwc) > { > + int epnum; > + unsigned long flags; > + > + spin_lock_irqsave(&dwc->lock, flags); > + for (epnum =3D 2; epnum < DWC3_ENDPOINTS_NUM; epnum++) { > + struct dwc3_ep *dep =3D dwc->eps[epnum]; > + > + if (!dep) > + continue; > + > + dep->flags &=3D ~DWC3_EP_END_TRANSFER_PENDING; > + } > + spin_unlock_irqrestore(&dwc->lock, flags); > + > usb_del_gadget_udc(&dwc->gadget); > dwc3_gadget_free_endpoints(dwc); free endpoints is a better place for this. It's already going to free the memory anyway. Might as well clear all flags to 0 there. =2D-=20 balbi --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEElLzh7wn96CXwjh2IzL64meEamQYFAlqWX+wACgkQzL64meEa mQYeVg/+Opmu5Cay5iySvIF9sIqB5JysXwVH+YufTmHZG9Kyj260D0ap0qY7ZWmc XeEZiQpaKc0BEozJfOf8hzgPwtjj4CIRt8Soz3jrkbSEVm35odoZWJ0DO4VMMx23 Fx3bmD1ZYlVzBVydeZMdn/LXQyz0pRFmeZivlY/c6npmR0V1t5SA1IzuNzbl5Ms+ i/8nmw9zKrsB4jrc8F1DEeEhTgky63mDxnOgDiQH8/vBn0QPoEhW3E45KvNeePlL Wxck+3TEJ7rxvfmPo4e6RhaJ9+fEiNx9FhZ/8JkdVgLO70IUD6OLTOxng7A869tN bLaAMvLld8aytY8IIoxTky+t0StMParTLjUnUaXaDvTIHWizpDHAcrOTTjj9yXDk 7mNKkFEN2OuZ6OTZ+qca7M30SPCZrsLLe9iHQvgKviWYqPDfpVLGOI8Fl2ePN4qu qxAUu2ZXClysGeg9UEO62u4H1WSldESHrT5L4189NHsjpQu+ewJTHdV9sn4TarII TbdUTwfusSpjpSumVdEBuDxtfPwgi3QHQRtxBoGHujC5HNoWSpn/yoH3AMlU2Aqm OGDdyXVsmeI8WGclyfo/tNkNRi0vo14g8QQ7Wk8CVUGYxnRLBTXvDSsahU0l5B/f VPBR3Y15aMOLv24ZXUBKq30vYKH+V+tYb5cn1V8TZ96teOyL4Ac= =TRU/ -----END PGP SIGNATURE----- --=-=-=--