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[83.28.42.246]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49092a925acsm89762075e9.14.2026.05.28.09.45.28 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Thu, 28 May 2026 09:45:28 -0700 (PDT) Date: Thu, 28 May 2026 18:45:24 +0200 From: Michal Pecio To: Henry Lin Cc: Laurent Pinchart , Mauro Carvalho Chehab , "linux-media@vger.kernel.org" , "linux-usb@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: Re: [RFC PATCH 0/1] media: uvcvideo: reset interface on bulk stream stop Message-ID: <20260528184524.08e98ddb.michal.pecio@gmail.com> In-Reply-To: References: <20260525182028.2148267-1-henryl@nvidia.com> <20260526015514.466b72d4.michal.pecio@gmail.com> <20260526121605.332525c6.michal.pecio@gmail.com> 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=US-ASCII Content-Transfer-Encoding: 7bit On Thu, 28 May 2026 08:36:12 +0000, Henry Lin wrote: > > Were you seeing one such error for each restart, followed by > > uvcvideo dropping a few frames and continuing to stream normally, > > or multiple transaction errors and complete functional failure? > > On the NVIDIA xHCI host controller, I see the former. > > After each stop/start cycle, uvcvideo reports one -71 completion > error, and only the first frame is broken. Streaming then continues > normally. I do not see multiple transaction errors or a complete > functional failure. > > With 25e531b422dc applied, the -71 completion error no longer appears > in the same test. No worries then, this is expected behavior and a known bug, now fixed. Regards, Michal