On Tue, Aug 10, 2010 at 02:29:20PM -0700, akpm@xxxxxxxxxxxxxxxxxxxx wrote: > From: Hans de Goede <hdegoede@xxxxxxxxxx> > > Some USB devices emulate a usb-mass-storage attached (scsi) cdrom device, > usually this fake cdrom contains the windows software for the device. > While working on supporting Appotech ax3003 based photoframes, which do > this I discovered that they will go of into lala land when ever they see a > READ_DISC_INFO scsi command. > > Thus this patch adds a scsi_device flag (which can then be set by the > usb-storage driver through an unsual-devs entry), to indicate this, and > makes the sr driver honor this flag. > > I know this sucks, but as discussed on linux-scsi list there is no other > way to make this device work properly. > > Looking at usb traces made under windows, windows never sends a > READ_DISC_INFO during normal interactions with a usb cdrom device. So as > this cdrom emulation thingie becomes more common we might see more of this > problem. > > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> > Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> > Cc: Greg KH <greg@xxxxxxxxx> > Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> > Cc: Matthew Dharm <mdharm-usb@xxxxxxxxxxxxxxxxxx> > Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > --- > > drivers/scsi/sr.c | 8 +++++++- > include/scsi/scsi_device.h | 1 + I can't take this one (and the other scsi-only one), unless James acks it. If so, I'll be glad to do so. James? -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
