USX2Y_STAT_CHIP_MMAP_PCM_URBS
if (subs->usx2y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)
if (!(subs->usx2y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS))
usx2y(card)->chip_status |= USX2Y_STAT_CHIP_MMAP_PCM_URBS;
usx2y(hw->card)->chip_status &= ~USX2Y_STAT_CHIP_MMAP_PCM_URBS;