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([2001:a61:13a1:1:4136:3ce:cdaa:75d2]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b3545a98300sm862948966b.106.2025.09.29.01.45.19 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 29 Sep 2025 01:45:20 -0700 (PDT) Message-ID: Date: Mon, 29 Sep 2025 10:45:19 +0200 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/2] net: usb: support quirks in usbnet To: yicongsrfy@163.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org Cc: marcan@marcan.st, pabeni@redhat.com, linux-usb@vger.kernel.org, netdev@vger.kernel.org, yicong@kylinos.cn References: <20250928014631.2832243-1-yicongsrfy@163.com> <20250928014631.2832243-2-yicongsrfy@163.com> Content-Language: en-US From: Oliver Neukum In-Reply-To: <20250928014631.2832243-2-yicongsrfy@163.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi, On 28.09.25 03:46, yicongsrfy@163.com wrote: > From: Yi Cong > > Some vendors' USB network interface controllers (NICs) may be compatible > with multiple drivers. And here is the basic problem. This issue is not an issue specific to usbnet. It arises everywhere we have a specific and a general driver. Hence it ought to be solved in generic way in usbcore. Nor can we do this with a simple list of devices, as we cannot assume that the more specific driver is compiled in all systems. An unconditional quirk is acceptable _only_ if usbnet would not work. Please get in contact with the core USB developers. The problem needs to be solved, but this is not a solution. Regards Oliver Nacked-by: Oliver Neukum