AMPDU_MIN_SPACE   197 drivers/net/wireless/realtek/rtlwifi/rtl8192se/reg.h #define	AMPDU_MIN_SPACE				0x0237
AMPDU_MIN_SPACE    32 drivers/staging/rtl8712/rtl8712_wmac_regdef.h #define AMPDU_MIN_SPACE			(RTL8712_WMAC_ + 0x37)