On Mon, 10 Jun 2013, Alan Stern wrote: > > Tasklet doesn't disable local interrupts. > > It is documented that interrupts will be disabled while the completion > handler runs. Therefore the tasklet _must_ disable local interrupts. You know, it may be that you can get most of the advantages you want by enabling local interrupts around the call to unmap_urb_for_dma() in usb_hcd_giveback_urb(). This may be a little dangerous, though, because it is possible for an URB to be given back at the time it is submitted. Drivers may not expect interrupts to get enabled temporarily when they call usb_submit_urb(). Alan Stern -- 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
