Without this flag, tools like Alex Page's USB Image Tool won't see drives exposed over USB Gadget as removable, and won't allow access to them. http://www.alexpage.de/usb-image-tool/
The code was pulled from the main-line kernel: drivers/usb/gadget/function/f_mass_storage.c
Signed-off-by: Eric Nelson eric.nelson@boundarydevices.com ---
drivers/usb/gadget/f_mass_storage.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c index f274d96..e045957 100644 --- a/drivers/usb/gadget/f_mass_storage.c +++ b/drivers/usb/gadget/f_mass_storage.c @@ -1110,6 +1110,7 @@ static int do_inquiry(struct fsg_common *common, struct fsg_buffhd *bh)
memset(buf, 0, 8); buf[0] = TYPE_DISK; + buf[1] = curlun->removable ? 0x80 : 0; buf[2] = 2; /* ANSI SCSI level 2 */ buf[3] = 2; /* SCSI-2 INQUIRY data format */ buf[4] = 31; /* Additional length */