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[83.28.45.67]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-61500a58aa6sm814588a12.27.2025.07.26.02.11.05 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Sat, 26 Jul 2025 02:11:06 -0700 (PDT) Date: Sat, 26 Jul 2025 11:11:01 +0200 From: =?UTF-8?B?TWljaGHFgg==?= Pecio To: Su Hui Cc: mathias.nyman@intel.com, gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: Re: [PATCH v2] usb: xhci: print xhci->xhc_state when queue_command failed Message-ID: <20250726111101.5928e289@foxbook> In-Reply-To: <09d18144-ab12-4bbc-8b61-e0b334ef13bc@nfschina.com> References: <20250725120329.2b6e3813@foxbook> <09d18144-ab12-4bbc-8b61-e0b334ef13bc@nfschina.com> Precedence: bulk X-Mailing-List: kernel-janitors@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 Fri, 25 Jul 2025 19:32:37 +0800, Su Hui wrote: > On 2025/7/25 18:03, Micha=C5=82 Pecio wrote: > >> Hmm, any chance you came across bugs that upstream should know about? = =20 > Actually, this bug is specific to the 5.4 version of the kernel and a=20 > particular USB camera. I am working > to resolve this issue. When the xhci_hcd is initialized, the driver sets= =20 > xhc_state to "halted", but before > the xhci_hcd calls xhci_start, the hub starts Initializing. Hub=20 > initialization failed due to xhc_state being > halted. Perhaps this issue is caused by hardware... Trying to queue commands before the chip is ready sounds like a SW bug. 5.4 is ancient (and EOL soon), newer releases may have this bug fixed.