On Tue, 5 Jun 2007, Alan Stern wrote: > On Tue, 5 Jun 2007, Guennadi Liakhovetski wrote: > > > I see a ~100% reproducible problem under 2.6.20 with g_file_storage: the > > script > > > > cp fs.image /tmp/ > > modprobe g_file_storage file=/tmp/fs.image > > > > comes with no error back, but the enumeration fails. Whereas inserting a > > sync between the "cp" and "modprobe" fixes it... It worked without sync > > under 2.4.30. Filesystem is ext3 mounted with default parameters > > (rw,data=ordered), gadget driver net2280, i386 platform. Is this intended > > behaviour? > > Yes, of course we always write device drivers so that they will fail in > unexpected ways unless the user does something unintuitive and > undocumented. :-)
Sure, I always program that way too:-) > When you say the enumeration fails, what exactly goes wrong? I've > never tried using g_file_storage with a newly-created backing file. Ok, the host says: usb usb1: wakeup_rh (auto-start) hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0004 uhci_hcd 0000:00:1f.2: port 2 portsc 0093,00 hub 1-0:1.0: port 2, status 0101, change 0001, 12 Mb/s hub 1-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x101 usb 1-2: new full speed USB device using uhci_hcd and address 69 usb 1-2: default language 0x0409 usb 1-2: new device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-2: Product: File-backed Storage Gadget usb 1-2: Manufacturer: Linux 2.6.20.1-rt8-dsa-mftd2x-2 with net2280 usb 1-2: SerialNumber: 3238204E6F76 usb 1-2: uevent usb 1-2: configuration #1 chosen from 1 choice usb 1-2: khubd timed out on ep0out len=0/0 usb 1-2: can't set config #1, error -110 drivers/usb/core/inode.c: creating file '069' hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0004 and on USB-analyser I see an invalid out-transaction with an "invalid toggle" and a setup transactio with only NAKs. Thanks Guennadi --------------------------------- Guennadi Liakhovetski, Ph.D. DSA Daten- und Systemtechnik GmbH Pascalstr. 28 D-52076 Aachen Germany ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
