On Sun, Sep 27, 2020 at 05:51:20PM +0000, bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=209411 > > Bug ID: 209411 > Summary: When retrieving string descriptor from mobile device > returns eproto error > Product: Drivers > Version: 2.5 > Kernel Version: 4.19 > Hardware: All > OS: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: USB > Assignee: drivers_usb@xxxxxxxxxxxxxxxxxxxxxx > Reporter: rachithas104@xxxxxxxxx > Regression: No > > I am trying to get get string descriptor from mobile phone,however when trying > to retrieve one particular index it returns EPROTO, > > dev->fd, USB_DIR_IN,USB_REQ_GET_DESCRIPTOR,DESCRIPT_STRING * 256 + index, > languageid, sizeof buf, buf); > > Return value is -1 for ioctl(fd, USBDEVFS_CONTROL, &ioctl_ctrl); > > kernel: [ 7084.327097] usb 1-1.2: reset high-speed USB device number 12 using > ehci-pci > kernel: [ 7084.831056] usb 1-1.2: device not accepting address 12, error -71 > kernel: [ 7085.119075] usb 1-1.2: reset high-speed USB device number 12 using > ehci-pci > kernel: [ 7085.431054] usb 1-1.2: reset high-speed USB device number 12 using > ehci-pci > [ 7085.935069] usb 1-1.2: device not accepting address 12, error -71 > [ 7086.227132] usb 1-1.2: reset high-speed USB device number 12 using ehci-pci > S[ 7087.321929] usb 1-1.2: usbfs: USBDEVFS_CONTROL failed cmd ctxusb rqt 128 rq > 6 len 255 ret -71 > kernel: [ 7087.607093] usb 1-1.2: reset high-speed USB device number 12 using > ehci-pci > > My URB request and without my program in picture request is same Not all strings are readable from the device, are you sure that is a valid string descriptor index to be requesting?
