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Thu, 27 Feb 2025 14:23:26 -0800 (PST) Received: from [192.168.1.14] ([38.175.170.29]) by smtp.gmail.com with ESMTPSA id e9e14a558f8ab-3d3deee5d4fsm5165025ab.62.2025.02.27.14.23.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 27 Feb 2025 14:23:26 -0800 (PST) Message-ID: <247c7e15-bbff-427f-8315-ca463f8b933b@linuxfoundation.org> Date: Thu, 27 Feb 2025 15:23:25 -0700 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] usbip: Fix the error limitation on max_hw_sectors for usbip device To: Zongmin Zhou Cc: valentina.manea.m@gmail.com, shuah@kernel.org, i@zenithal.me, gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Zongmin Zhou , Shuah Khan References: <20250219092555.112631-1-min_halo@163.com> <88b2fb4b-96a4-4d29-bf92-4064d3572fa4@linuxfoundation.org> <5a41d6c3.8c78.195371996e0.Coremail.min_halo@163.com> Content-Language: en-US From: Shuah Khan In-Reply-To: <5a41d6c3.8c78.195371996e0.Coremail.min_halo@163.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 2/24/25 01:36, Zongmin Zhou wrote: > Dear Shuah, > > > Yes，the usbip server get the real USB controller message send to usbip client vhci-hcd， > > must have to changethe API between the kernel and user-space. > > The easiest way is to simply set vhci-hcd dma mask to 64 by default, > > but not all USB controllers support 64bit，That doesn't look good？ This is an expetnsive change to fix the problem. In addition this change is unnecessary for non-storage devices where USB over IP is used. You mentioned this happens only in swiotlb cases? Can you explain the configuration on host and client side. I would like to explore fixes that are simpler than what is proposed in this patch. thanks, -- Shuah