SNDRV_CTL_ELEM_ACCESS_TLV_WRITE 751 include/sound/asound.h #define SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE (SNDRV_CTL_ELEM_ACCESS_TLV_READ|SNDRV_CTL_ELEM_ACCESS_TLV_WRITE) SNDRV_CTL_ELEM_ACCESS_TLV_WRITE 1122 sound/core/control.c (op_flag > 0 && (vd->access & SNDRV_CTL_ELEM_ACCESS_TLV_WRITE) == 0) ||