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([2001:a61:137b:5001:be5a:c750:b487:ff1b]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3680db047c4sm5711198f8f.108.2024.07.15.01.53.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 15 Jul 2024 01:53:15 -0700 (PDT) Message-ID: <2a80d11d-029f-4e7e-9a8e-3abae1034add@suse.com> Date: Mon, 15 Jul 2024 10:53:14 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH next] usb: usbfs: Add reset_resume for usbfs To: Alan Stern , Oliver Neukum Cc: Hongyu Xie , gregkh@linuxfoundation.org, brauner@kernel.org, jlayton@kernel.org, jack@suse.cz, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org References: <20240711084321.44916-1-xiehongyu1@kylinos.cn> <527927b8-9475-47da-bf2b-7a5d9e81e470@suse.com> <9ef72886-13b8-46cf-a0aa-54dad36102e9@rowland.harvard.edu> Content-Language: en-US From: Oliver Neukum In-Reply-To: <9ef72886-13b8-46cf-a0aa-54dad36102e9@rowland.harvard.edu> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 11.07.24 16:41, Alan Stern wrote: > On Thu, Jul 11, 2024 at 10:59:56AM +0200, Oliver Neukum wrote: >> I am sorry, but this implementation has some fundamental issues. > > Agreed, but the solution is pretty simple. Because the device was > suspended, the userspace driver must have enabled suspend via the > USBDEVFS_ALLOW_SUSPEND ioctl. The whole system could have been suspended, in particularly to S4. Regards Oliver