MTK_STAR_DESC_BIT_COWN
if (!(status & MTK_STAR_DESC_BIT_COWN))
status &= MTK_STAR_DESC_BIT_COWN | MTK_STAR_DESC_BIT_EOR;
status &= ~MTK_STAR_DESC_BIT_COWN;
desc->status = MTK_STAR_DESC_BIT_COWN;
priv->descs_base[i].status |= MTK_STAR_DESC_BIT_COWN;
desc->status &= ~MTK_STAR_DESC_BIT_COWN;