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[83.28.48.202]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-af91a0df2e4sm163007166b.62.2025.07.31.13.21.19 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Thu, 31 Jul 2025 13:21:19 -0700 (PDT) Date: Thu, 31 Jul 2025 22:21:16 +0200 From: =?UTF-8?B?TWljaGHFgg==?= Pecio To: Robert Ham Cc: linux-usb@vger.kernel.org Subject: Re: Audio interface causing "xhci_hcd ... WARN: buffer overrun event" messages Message-ID: <20250731222116.79b15493@foxbook> In-Reply-To: <87114caf-7c0d-4e51-bb3e-f171fc20ac62@settrans.net> References: <20250731101720.5d10a8f1@foxbook> <87114caf-7c0d-4e51-bb3e-f171fc20ac62@settrans.net> Precedence: bulk X-Mailing-List: linux-usb@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 On Thu, 31 Jul 2025 11:04:40 +0100, Robert Ham wrote: > On 31/07/2025 09:17, Micha=C5=82 Pecio wrote: > > Can you mount debugfs and see if you can find the directory below? It > > would tell if there is anything unusual about those 1 in 65 buffers. > >=20 > > /sys/kernel/debug/usb/xhci/0000:00:14.0/ =20 >=20 > Umm.. and this is with the device connected and snd-usb-audio loaded, > which might be more helpful :-) >=20 > /sys/kernel/debug/usb/xhci/0000:00:14.0/ > /sys/kernel/debug/usb/xhci/0000:00:14.0/ports > /sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port01 > /sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port01/portsc > [...] Actually, the useful stuff would be contents of some of those files, but the trace you posted later provides similar information. And it looks like you will need to dig into snd-usb-audio some more. FYI, scripts/get_maintainer says that the relevant mailing list for that driver is linux-sound. Regards, Michal