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[88.113.215.33]) by smtp.gmail.com with ESMTPSA id s18sm1932660ljj.36.2020.01.23.09.31.04 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 23 Jan 2020 09:31:05 -0800 (PST) From: Felipe Balbi To: "Yang\, Fei" , Andrzej Pietrasiewicz , John Stultz , lkml Cc: Felipe Balbi , Thinh Nguyen , Tejas Joglekar , Jack Pham , Todd Kjos , Greg KH , Linux USB List , stable Subject: RE: [RFC][PATCH 0/2] Avoiding DWC3 transfer stalls/hangs when using adb over f_fs In-Reply-To: <02E7334B1630744CBDC55DA8586225837F9EE280@ORSMSX102.amr.corp.intel.com> References: <20200122222645.38805-1-john.stultz@linaro.org> <02E7334B1630744CBDC55DA8586225837F9EE280@ORSMSX102.amr.corp.intel.com> Date: Thu, 23 Jan 2020 19:31:54 +0200 Message-ID: <87o8uu3wqd.fsf@kernel.org> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org --=-=-= Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Hi, "Yang, Fei" writes: >>> Hey all, >>> I wanted to send these out for comment and thoughts. >>>=20 >>> Since ~4.20, when the functionfs gadget enabled scatter-gather=20 >>> support, we have seen problems with adb connections stalling and=20 >>> stopping to function on hardware with dwc3 usb controllers. >>> Specifically, HiKey960, Dragonboard 845c, and Pixel3 devices. >> >> Any chance this: >>=20 >> https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git/commit/?h= =3Dtesting/next&id=3Df63333e8e4fd63d8d8ae83b89d2c38cf21d64801 > This is a different issue. I have tried initializing num_sgs when debuggi= ng this adb stall problem, but it didn't help. So multiple folks have run through this problem, but not *one* has tracepoints collected from the issue? C'mon guys. Can someone, please, collect tracepoints so we can figure out what's actually going on? I'm pretty sure this should be solved at the DMA API level, just want to confirm. cheers =2D-=20 balbi --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEElLzh7wn96CXwjh2IzL64meEamQYFAl4p2IoACgkQzL64meEa mQZbPRAAnbPf/J/ta6ffA1BbOyMUF8EnrASllIGEfba7lkJ06oM9KbYAWojsxv1z pi3ch1+GVa0S5rCjwQItnCTUwMPqucLLFh9lzy6ubUL5oxTVa9nA6GhMmFTpomfY jIQyhafsiW78+srmozJX5ibHpYQJpfSN/63t5XS26vxqTRcIf7AiOe4ZgpNAp/7w AH2VAELrlgF7mIIMIwpozTvFXqxKd+QwrCVwAnz6fL/CW5/0y7V+VdgKbSgpI409 ycIRPGFt7vUCFuT+nfZXEB3pZIQ8urObdEeE9Bq+Tb7I5jGmqxngLcSxsiu97S0y zPIn+nPmgOPyt1rOLrpw3VJtSdRmdz3Lnx/i5iwFXcXGGHvV18fQEznHMDz55wzf N/umXnh/7mck9dMqcRDJCCw9Oq/PPA1twzCZ39Ne/Wom5Q+voHL0/liMTgIkXUhV sf7tuaks+bKKTCYSOR6yIZKmkL1RIYt209wt9tigDBSj/gDJDdGtNX7rtCBYAd5I mmKOxImp1hkwyOKPGN3UKSzOKLduajOkvac6fv1lh7kKWQjIAcx4e00cAGCmtRim GD4Et1fYhI2/9c6qd96Z9U3YkdQ/O3cMQ9njYTRq/Ihm7Tohd+gdTSIt/Qu6m73Y EPwPjgtecfvnV4lYmW0pt3PbDZBrBz4qYjlCF/PmaU35YJERd6E= =H9Ta -----END PGP SIGNATURE----- --=-=-=--