I_XU              206 drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c #define	I_XU		(1 << 15)	/* Transmit fifo Underflow */
I_XU              448 drivers/net/wireless/broadcom/brcm80211/brcmsmac/d11.h #define	I_XU		(1 << 15)	/* transmit fifo underflow */