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Wed, 8 Jul 2020 10:29:59 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id DC8E616E18; Wed, 8 Jul 2020 12:29:58 +0200 (CEST) Date: Wed, 8 Jul 2020 12:29:58 +0200 From: Gerd Hoffmann To: Paul Zimmerman Subject: Re: Failure prints during format or mounting a usb storage device Message-ID: <20200708102958.kxnlr5outhsufxv5@sirius.home.kraxel.org> References: <2d312ec0-d280-c0e3-2b1e-ff9c70c3168f@gmail.com> <20200707075740.dkc76ceb7wytdoem@sirius.home.kraxel.org> <20200708072947.7hynrm53622tp3ha@sirius.home.kraxel.org> MIME-Version: 1.0 In-Reply-To: X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kraxel@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=205.139.110.61; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/07 17:25:10 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -40 X-Spam_score: -4.1 X-Spam_bar: ---- X-Spam_report: (-4.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sai Pavan Boddu , Peter Maydell , "qemu-devel@nongnu.org" , Vikram Garhwal Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hi, > IIRC, without the dev-storage patch, the very first SCSI command > would get stuck waiting for the CSW, because the CSW is not a > multiple of MPS. I will have to work on getting a debug trace for > you, I'll get back to you with that. Hmm, dev-storage should be fine with the packet being larger than needed. It'll actually do a short transfer then. So I suspect the patch just papers over the underlying issue. Can you post a trace of this? (dev-storage has no trace support, so I think tracing usb_dwc2* to stderr and enable DEBUG_MSD in dev-storage.c works best) take care, Gerd