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[83.28.45.234]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6a9c7e82cc1sm4177292a12.0.2026.09.15.01.01.40 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Tue, 15 Sep 2026 01:01:42 -0700 (PDT) Date: Tue, 15 Sep 2026 10:01:36 +0200 From: Michal Pecio To: =?UTF-8?B?6IOh6L+e5Yuk?= Cc: Mathias Nyman , Selvarasu Ganesan , Mathias Nyman , Greg Kroah-Hartman , "quic_wcheng@quicinc.com" , "broonie@kernel.org" , "linux-usb@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "cpgs@samsung.com" , "alim.akhtar@samsung.com" , "thiagu.r@samsung.com" Subject: Re: [PATCH] xhci: sideband: check vdev liveness before removing endpoints on unregister Message-ID: <20260915100136.38b4c31f.michal.pecio@gmail.com> In-Reply-To: References: <360067785.01789039502721.JavaMail.epsvc@epcpadp1new> <750468423.101789103583573.JavaMail.epsvc@epcpadp2new> <937773018.41789116303608.JavaMail.epsvc@epcpadp1new> <191ee5d5-d93d-4fa3-9654-b3735d344118@linux.intel.com> <20260912141837.06b2f3cf.michal.pecio@gmail.com> <20260914110949.38a46596.michal.pecio@gmail.com> <852003c6-317c-4004-ba2c-d6c4b0bd31e6@linux.intel.com> <20260914154656.56824fbd.michal.pecio@gmail.com> 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 Tue, 15 Sep 2026 07:45:50 +0000, =E8=83=A1=E8=BF=9E=E5=8B=A4 wrote: > Unfortunately, no. The reproduction rate is very low, and we have > not yet found a stable way to reproduce it =E2=80=94 it requires the > device to be in a specific state where the port is disabled after > autosuspend resume, which happens rarely in the field. Why are offloaded devices being suspended at all? Obviously, no "sideband entity" can be using a suspended device, so it seems that: - if the device is unused and meant to be suspended, sideband can be removed before suspending - if the device becomes suspended while in use, obviously it's a bug Regards, Michal