From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41434) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YKva5-0003nE-2x for qemu-devel@nongnu.org; Mon, 09 Feb 2015 16:09:22 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YKva0-0007Ob-LZ for qemu-devel@nongnu.org; Mon, 09 Feb 2015 16:09:21 -0500 Received: from mailout07.t-online.de ([194.25.134.83]:56052) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YKva0-0007OB-ES for qemu-devel@nongnu.org; Mon, 09 Feb 2015 16:09:16 -0500 Message-ID: <54D921F0.2060809@t-online.de> Date: Mon, 09 Feb 2015 22:09:04 +0100 From: Dennis Ostermann MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] Revert commit 5af35d7feccaa7d26b72c6c3d14116421d736b36 - "usb-host-libusb: Fix reset handling" List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: hdegoede@redhat.com, kraxel@redhat.com Hi there, please revert commit 5af35d7feccaa7d26b72c6c3d14116421d736b36 - "usb-host-libusb: Fix reset handling" This breaks usb pass through of FTDI based usb devices: On the host: lsusb | grep FT2232 Bus 003 Device 008: ID 0403:6010 Future Technology Devices International, Ltd FT2232C Dual USB-UART/FIFO IC ~/qemu-install/bin$ sudo ./qemu-system-x86_64 -monitor telnet:127.0.0.1:1234,server,nowait -hda /dev/sdd2 -redir tcp:20022::22 --enable-kvm -cpu host -smp 4 -vga vmware --vnc :0 -m 8192 -usb -device usb-ehci,id=ehci -device usb-host,bus=ehci.0,vendorid=0x0403,productid=0x6010 WARNING: Image format was not specified for '/dev/sdd2' and probing guessed raw. Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted. Specify the 'raw' format explicitly to remove the restrictions. libusbx: error [_get_usbfs_fd] libusbx couldn't open USB device /dev/bus/usb/003/005: No such file or directory libusbx: error [_get_usbfs_fd] libusbx couldn't open USB device /dev/bus/usb/003/006: No such file or directory libusbx: error [_get_usbfs_fd] libusbx couldn't open USB device /dev/bus/usb/003/007: No such device The device gets reset again and again and is re-enumerated every time and finally not passed through. After reverting the commit: ~/qemu-patched-install/bin$ sudo ./qemu-system-x86_64 -monitor telnet:127.0.0.1:1234,server,nowait -hda /dev/sdd2 -redir tcp:20022::22 --enable-kvm -cpu host -smp 4 -vga vmware --vnc :0 -m 8192 -usb -device usb-ehci,id=ehci -device usb-host,bus=ehci.0,vendorid=0x0403,productid=0x6010 WARNING: Image format was not specified for '/dev/sdd2' and probing guessed raw. Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted. Specify the 'raw' format explicitly to remove the restrictions. The device appears in the guest OS and can be used. Tested with HEAD and several libusb versions. Affects at least FTDI FT2232H and FTDI FT232R. Thanks and best regards, Dennis Ostermann