Lines Matching refs:ldata
131 static inline size_t read_cnt(struct n_tty_data *ldata) in read_cnt() argument
133 return ldata->read_head - ldata->read_tail; in read_cnt()
136 static inline unsigned char read_buf(struct n_tty_data *ldata, size_t i) in read_buf() argument
138 return ldata->read_buf[i & (N_TTY_BUF_SIZE - 1)]; in read_buf()
141 static inline unsigned char *read_buf_addr(struct n_tty_data *ldata, size_t i) in read_buf_addr() argument
143 return &ldata->read_buf[i & (N_TTY_BUF_SIZE - 1)]; in read_buf_addr()
146 static inline unsigned char echo_buf(struct n_tty_data *ldata, size_t i) in echo_buf() argument
149 return ldata->echo_buf[i & (N_TTY_BUF_SIZE - 1)]; in echo_buf()
152 static inline unsigned char *echo_buf_addr(struct n_tty_data *ldata, size_t i) in echo_buf_addr() argument
154 return &ldata->echo_buf[i & (N_TTY_BUF_SIZE - 1)]; in echo_buf_addr()
170 struct n_tty_data *ldata = tty->disc_data; in tty_copy_to_user() local
172 void *from = read_buf_addr(ldata, tail); in tty_copy_to_user()
183 from = ldata->read_buf; in tty_copy_to_user()
206 struct n_tty_data *ldata = tty->disc_data; in n_tty_kick_worker() local
209 if (unlikely(ldata->no_room)) { in n_tty_kick_worker()
210 ldata->no_room = 0; in n_tty_kick_worker()
226 struct n_tty_data *ldata = tty->disc_data; in chars_in_buffer() local
229 if (!ldata->icanon) in chars_in_buffer()
230 n = ldata->commit_head - ldata->read_tail; in chars_in_buffer()
232 n = ldata->canon_head - ldata->read_tail; in chars_in_buffer()
253 struct n_tty_data *ldata = tty->disc_data; in n_tty_check_throttle() local
260 if (ldata->icanon && ldata->canon_head == ldata->read_tail) in n_tty_check_throttle()
266 if (N_TTY_BUF_SIZE - read_cnt(ldata) >= TTY_THRESHOLD_THROTTLE) in n_tty_check_throttle()
317 static inline void put_tty_queue(unsigned char c, struct n_tty_data *ldata) in put_tty_queue() argument
319 *read_buf_addr(ldata, ldata->read_head) = c; in put_tty_queue()
320 ldata->read_head++; in put_tty_queue()
334 static void reset_buffer_flags(struct n_tty_data *ldata) in reset_buffer_flags() argument
336 ldata->read_head = ldata->canon_head = ldata->read_tail = 0; in reset_buffer_flags()
337 ldata->commit_head = 0; in reset_buffer_flags()
338 ldata->line_start = 0; in reset_buffer_flags()
340 ldata->erasing = 0; in reset_buffer_flags()
341 bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE); in reset_buffer_flags()
342 ldata->push = 0; in reset_buffer_flags()
433 struct n_tty_data *ldata = tty->disc_data; in do_output_char() local
442 ldata->column = 0; in do_output_char()
446 ldata->canon_column = ldata->column = 0; in do_output_char()
450 ldata->canon_column = ldata->column; in do_output_char()
453 if (O_ONOCR(tty) && ldata->column == 0) in do_output_char()
458 ldata->canon_column = ldata->column = 0; in do_output_char()
461 ldata->canon_column = ldata->column = 0; in do_output_char()
464 spaces = 8 - (ldata->column & 7); in do_output_char()
468 ldata->column += spaces; in do_output_char()
472 ldata->column += spaces; in do_output_char()
475 if (ldata->column > 0) in do_output_char()
476 ldata->column--; in do_output_char()
483 ldata->column++; in do_output_char()
508 struct n_tty_data *ldata = tty->disc_data; in process_output() local
511 mutex_lock(&ldata->output_lock); in process_output()
516 mutex_unlock(&ldata->output_lock); in process_output()
545 struct n_tty_data *ldata = tty->disc_data; in process_output_block() local
550 mutex_lock(&ldata->output_lock); in process_output_block()
554 mutex_unlock(&ldata->output_lock); in process_output_block()
566 ldata->column = 0; in process_output_block()
569 ldata->canon_column = ldata->column; in process_output_block()
572 if (O_ONOCR(tty) && ldata->column == 0) in process_output_block()
576 ldata->canon_column = ldata->column = 0; in process_output_block()
581 if (ldata->column > 0) in process_output_block()
582 ldata->column--; in process_output_block()
589 ldata->column++; in process_output_block()
597 mutex_unlock(&ldata->output_lock); in process_output_block()
628 struct n_tty_data *ldata = tty->disc_data; in __process_echoes() local
635 tail = ldata->echo_tail; in __process_echoes()
636 while (MASK(ldata->echo_commit) != MASK(tail)) { in __process_echoes()
637 c = echo_buf(ldata, tail); in __process_echoes()
647 if (MASK(ldata->echo_commit) == MASK(tail + 1)) in __process_echoes()
654 op = echo_buf(ldata, tail + 1); in __process_echoes()
660 if (MASK(ldata->echo_commit) == MASK(tail + 2)) in __process_echoes()
662 num_chars = echo_buf(ldata, tail + 2); in __process_echoes()
675 num_chars += ldata->canon_column; in __process_echoes()
685 if (ldata->column > 0) in __process_echoes()
686 ldata->column--; in __process_echoes()
692 ldata->canon_column = ldata->column; in __process_echoes()
697 if (ldata->column > 0) in __process_echoes()
698 ldata->column--; in __process_echoes()
709 ldata->column++; in __process_echoes()
730 ldata->column += 2; in __process_echoes()
756 while (ldata->echo_commit > tail && in __process_echoes()
757 ldata->echo_commit - tail >= ECHO_DISCARD_WATERMARK) { in __process_echoes()
758 if (echo_buf(ldata, tail) == ECHO_OP_START) { in __process_echoes()
759 if (echo_buf(ldata, tail + 1) == ECHO_OP_ERASE_TAB) in __process_echoes()
768 ldata->echo_tail = tail; in __process_echoes()
774 struct n_tty_data *ldata = tty->disc_data; in commit_echoes() local
778 mutex_lock(&ldata->output_lock); in commit_echoes()
779 head = ldata->echo_head; in commit_echoes()
780 ldata->echo_mark = head; in commit_echoes()
781 old = ldata->echo_commit - ldata->echo_tail; in commit_echoes()
786 nr = head - ldata->echo_tail; in commit_echoes()
789 mutex_unlock(&ldata->output_lock); in commit_echoes()
793 ldata->echo_commit = head; in commit_echoes()
795 mutex_unlock(&ldata->output_lock); in commit_echoes()
803 struct n_tty_data *ldata = tty->disc_data; in process_echoes() local
806 if (ldata->echo_mark == ldata->echo_tail) in process_echoes()
809 mutex_lock(&ldata->output_lock); in process_echoes()
810 ldata->echo_commit = ldata->echo_mark; in process_echoes()
812 mutex_unlock(&ldata->output_lock); in process_echoes()
821 struct n_tty_data *ldata = tty->disc_data; in flush_echoes() local
824 ldata->echo_commit == ldata->echo_head) in flush_echoes()
827 mutex_lock(&ldata->output_lock); in flush_echoes()
828 ldata->echo_commit = ldata->echo_head; in flush_echoes()
830 mutex_unlock(&ldata->output_lock); in flush_echoes()
841 static inline void add_echo_byte(unsigned char c, struct n_tty_data *ldata) in add_echo_byte() argument
843 *echo_buf_addr(ldata, ldata->echo_head) = c; in add_echo_byte()
845 ldata->echo_head++; in add_echo_byte()
855 static void echo_move_back_col(struct n_tty_data *ldata) in echo_move_back_col() argument
857 add_echo_byte(ECHO_OP_START, ldata); in echo_move_back_col()
858 add_echo_byte(ECHO_OP_MOVE_BACK_COL, ldata); in echo_move_back_col()
869 static void echo_set_canon_col(struct n_tty_data *ldata) in echo_set_canon_col() argument
871 add_echo_byte(ECHO_OP_START, ldata); in echo_set_canon_col()
872 add_echo_byte(ECHO_OP_SET_CANON_COL, ldata); in echo_set_canon_col()
891 struct n_tty_data *ldata) in echo_erase_tab() argument
893 add_echo_byte(ECHO_OP_START, ldata); in echo_erase_tab()
894 add_echo_byte(ECHO_OP_ERASE_TAB, ldata); in echo_erase_tab()
903 add_echo_byte(num_chars, ldata); in echo_erase_tab()
917 static void echo_char_raw(unsigned char c, struct n_tty_data *ldata) in echo_char_raw() argument
920 add_echo_byte(ECHO_OP_START, ldata); in echo_char_raw()
921 add_echo_byte(ECHO_OP_START, ldata); in echo_char_raw()
923 add_echo_byte(c, ldata); in echo_char_raw()
941 struct n_tty_data *ldata = tty->disc_data; in echo_char() local
944 add_echo_byte(ECHO_OP_START, ldata); in echo_char()
945 add_echo_byte(ECHO_OP_START, ldata); in echo_char()
948 add_echo_byte(ECHO_OP_START, ldata); in echo_char()
949 add_echo_byte(c, ldata); in echo_char()
958 static inline void finish_erasing(struct n_tty_data *ldata) in finish_erasing() argument
960 if (ldata->erasing) { in finish_erasing()
961 echo_char_raw('/', ldata); in finish_erasing()
962 ldata->erasing = 0; in finish_erasing()
981 struct n_tty_data *ldata = tty->disc_data; in eraser() local
987 if (ldata->read_head == ldata->canon_head) { in eraser()
997 ldata->read_head = ldata->canon_head; in eraser()
1001 ldata->read_head = ldata->canon_head; in eraser()
1002 finish_erasing(ldata); in eraser()
1006 echo_char_raw('\n', ldata); in eraser()
1013 while (MASK(ldata->read_head) != MASK(ldata->canon_head)) { in eraser()
1014 head = ldata->read_head; in eraser()
1019 c = read_buf(ldata, head); in eraser()
1021 MASK(head) != MASK(ldata->canon_head)); in eraser()
1034 cnt = ldata->read_head - head; in eraser()
1035 ldata->read_head = head; in eraser()
1038 if (!ldata->erasing) { in eraser()
1039 echo_char_raw('\\', ldata); in eraser()
1040 ldata->erasing = 1; in eraser()
1046 echo_char_raw(read_buf(ldata, head), ldata); in eraser()
1047 echo_move_back_col(ldata); in eraser()
1054 size_t tail = ldata->read_head; in eraser()
1063 while (MASK(tail) != MASK(ldata->canon_head)) { in eraser()
1065 c = read_buf(ldata, tail); in eraser()
1076 echo_erase_tab(num_chars, after_tab, ldata); in eraser()
1079 echo_char_raw('\b', ldata); in eraser()
1080 echo_char_raw(' ', ldata); in eraser()
1081 echo_char_raw('\b', ldata); in eraser()
1084 echo_char_raw('\b', ldata); in eraser()
1085 echo_char_raw(' ', ldata); in eraser()
1086 echo_char_raw('\b', ldata); in eraser()
1093 if (ldata->read_head == ldata->canon_head && L_ECHO(tty)) in eraser()
1094 finish_erasing(ldata); in eraser()
1123 struct n_tty_data *ldata = tty->disc_data; in isig() local
1136 mutex_lock(&ldata->output_lock); in isig()
1137 ldata->echo_head = ldata->echo_tail = 0; in isig()
1138 ldata->echo_mark = ldata->echo_commit = 0; in isig()
1139 mutex_unlock(&ldata->output_lock); in isig()
1171 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_break() local
1180 put_tty_queue('\377', ldata); in n_tty_receive_break()
1181 put_tty_queue('\0', ldata); in n_tty_receive_break()
1183 put_tty_queue('\0', ldata); in n_tty_receive_break()
1201 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_overrun() local
1203 ldata->num_overrun++; in n_tty_receive_overrun()
1204 if (time_after(jiffies, ldata->overrun_time + HZ) || in n_tty_receive_overrun()
1205 time_after(ldata->overrun_time, jiffies)) { in n_tty_receive_overrun()
1206 tty_warn(tty, "%d input overrun(s)\n", ldata->num_overrun); in n_tty_receive_overrun()
1207 ldata->overrun_time = jiffies; in n_tty_receive_overrun()
1208 ldata->num_overrun = 0; in n_tty_receive_overrun()
1225 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_parity_error() local
1231 put_tty_queue('\377', ldata); in n_tty_receive_parity_error()
1232 put_tty_queue('\0', ldata); in n_tty_receive_parity_error()
1233 put_tty_queue(c, ldata); in n_tty_receive_parity_error()
1235 put_tty_queue('\0', ldata); in n_tty_receive_parity_error()
1237 put_tty_queue(c, ldata); in n_tty_receive_parity_error()
1273 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_char_special() local
1313 if (ldata->icanon) { in n_tty_receive_char_special()
1321 ldata->lnext = 1; in n_tty_receive_char_special()
1323 finish_erasing(ldata); in n_tty_receive_char_special()
1325 echo_char_raw('^', ldata); in n_tty_receive_char_special()
1326 echo_char_raw('\b', ldata); in n_tty_receive_char_special()
1333 size_t tail = ldata->canon_head; in n_tty_receive_char_special()
1335 finish_erasing(ldata); in n_tty_receive_char_special()
1337 echo_char_raw('\n', ldata); in n_tty_receive_char_special()
1338 while (MASK(tail) != MASK(ldata->read_head)) { in n_tty_receive_char_special()
1339 echo_char(read_buf(ldata, tail), tty); in n_tty_receive_char_special()
1347 echo_char_raw('\n', ldata); in n_tty_receive_char_special()
1363 if (ldata->canon_head == ldata->read_head) in n_tty_receive_char_special()
1364 echo_set_canon_col(ldata); in n_tty_receive_char_special()
1373 put_tty_queue(c, ldata); in n_tty_receive_char_special()
1376 set_bit(ldata->read_head & (N_TTY_BUF_SIZE - 1), ldata->read_flags); in n_tty_receive_char_special()
1377 put_tty_queue(c, ldata); in n_tty_receive_char_special()
1378 smp_store_release(&ldata->canon_head, ldata->read_head); in n_tty_receive_char_special()
1386 finish_erasing(ldata); in n_tty_receive_char_special()
1388 echo_char_raw('\n', ldata); in n_tty_receive_char_special()
1391 if (ldata->canon_head == ldata->read_head) in n_tty_receive_char_special()
1392 echo_set_canon_col(ldata); in n_tty_receive_char_special()
1400 put_tty_queue(c, ldata); in n_tty_receive_char_special()
1402 put_tty_queue(c, ldata); in n_tty_receive_char_special()
1409 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_char_inline() local
1416 finish_erasing(ldata); in n_tty_receive_char_inline()
1418 if (ldata->canon_head == ldata->read_head) in n_tty_receive_char_inline()
1419 echo_set_canon_col(ldata); in n_tty_receive_char_inline()
1425 put_tty_queue(c, ldata); in n_tty_receive_char_inline()
1426 put_tty_queue(c, ldata); in n_tty_receive_char_inline()
1437 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_char_fast() local
1444 finish_erasing(ldata); in n_tty_receive_char_fast()
1446 if (ldata->canon_head == ldata->read_head) in n_tty_receive_char_fast()
1447 echo_set_canon_col(ldata); in n_tty_receive_char_fast()
1451 put_tty_queue(c, ldata); in n_tty_receive_char_fast()
1497 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_char_lnext() local
1499 ldata->lnext = 0; in n_tty_receive_char_lnext()
1514 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_buf_real_raw() local
1517 head = ldata->read_head & (N_TTY_BUF_SIZE - 1); in n_tty_receive_buf_real_raw()
1519 memcpy(read_buf_addr(ldata, head), cp, n); in n_tty_receive_buf_real_raw()
1520 ldata->read_head += n; in n_tty_receive_buf_real_raw()
1524 head = ldata->read_head & (N_TTY_BUF_SIZE - 1); in n_tty_receive_buf_real_raw()
1526 memcpy(read_buf_addr(ldata, head), cp, n); in n_tty_receive_buf_real_raw()
1527 ldata->read_head += n; in n_tty_receive_buf_real_raw()
1534 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_buf_raw() local
1541 put_tty_queue(*cp++, ldata); in n_tty_receive_buf_raw()
1565 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_buf_standard() local
1579 put_tty_queue(c, ldata); in n_tty_receive_buf_standard()
1582 if (!test_bit(c, ldata->char_map)) in n_tty_receive_buf_standard()
1599 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_buf_fast() local
1608 if (!test_bit(c, ldata->char_map)) in n_tty_receive_buf_fast()
1624 struct n_tty_data *ldata = tty->disc_data; in __receive_buf() local
1627 if (ldata->real_raw) in __receive_buf()
1629 else if (ldata->raw || (L_EXTPROC(tty) && !preops)) in __receive_buf()
1634 if (ldata->lnext) { in __receive_buf()
1653 if (ldata->icanon && !L_EXTPROC(tty)) in __receive_buf()
1657 smp_store_release(&ldata->commit_head, ldata->read_head); in __receive_buf()
1659 if (read_cnt(ldata)) { in __receive_buf()
1702 struct n_tty_data *ldata = tty->disc_data; in n_tty_receive_buf_common() local
1721 size_t tail = smp_load_acquire(&ldata->read_tail); in n_tty_receive_buf_common()
1723 room = N_TTY_BUF_SIZE - (ldata->read_head - tail); in n_tty_receive_buf_common()
1728 overflow = ldata->icanon && ldata->canon_head == tail; in n_tty_receive_buf_common()
1730 ldata->read_head--; in n_tty_receive_buf_common()
1732 ldata->no_room = flow && !room; in n_tty_receive_buf_common()
1796 struct n_tty_data *ldata = tty->disc_data; in n_tty_set_termios() local
1799 bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE); in n_tty_set_termios()
1800 ldata->line_start = ldata->read_tail; in n_tty_set_termios()
1801 if (!L_ICANON(tty) || !read_cnt(ldata)) { in n_tty_set_termios()
1802 ldata->canon_head = ldata->read_tail; in n_tty_set_termios()
1803 ldata->push = 0; in n_tty_set_termios()
1805 set_bit((ldata->read_head - 1) & (N_TTY_BUF_SIZE - 1), in n_tty_set_termios()
1806 ldata->read_flags); in n_tty_set_termios()
1807 ldata->canon_head = ldata->read_head; in n_tty_set_termios()
1808 ldata->push = 1; in n_tty_set_termios()
1810 ldata->commit_head = ldata->read_head; in n_tty_set_termios()
1811 ldata->erasing = 0; in n_tty_set_termios()
1812 ldata->lnext = 0; in n_tty_set_termios()
1815 ldata->icanon = (L_ICANON(tty) != 0); in n_tty_set_termios()
1821 bitmap_zero(ldata->char_map, 256); in n_tty_set_termios()
1824 set_bit('\r', ldata->char_map); in n_tty_set_termios()
1826 set_bit('\n', ldata->char_map); in n_tty_set_termios()
1829 set_bit(ERASE_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1830 set_bit(KILL_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1831 set_bit(EOF_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1832 set_bit('\n', ldata->char_map); in n_tty_set_termios()
1833 set_bit(EOL_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1835 set_bit(WERASE_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1836 set_bit(LNEXT_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1837 set_bit(EOL2_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1840 ldata->char_map); in n_tty_set_termios()
1844 set_bit(START_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1845 set_bit(STOP_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1848 set_bit(INTR_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1849 set_bit(QUIT_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1850 set_bit(SUSP_CHAR(tty), ldata->char_map); in n_tty_set_termios()
1852 clear_bit(__DISABLED_CHAR, ldata->char_map); in n_tty_set_termios()
1853 ldata->raw = 0; in n_tty_set_termios()
1854 ldata->real_raw = 0; in n_tty_set_termios()
1856 ldata->raw = 1; in n_tty_set_termios()
1860 ldata->real_raw = 1; in n_tty_set_termios()
1862 ldata->real_raw = 0; in n_tty_set_termios()
1890 struct n_tty_data *ldata = tty->disc_data; in n_tty_close() local
1895 vfree(ldata); in n_tty_close()
1911 struct n_tty_data *ldata; in n_tty_open() local
1914 ldata = vzalloc(sizeof(*ldata)); in n_tty_open()
1915 if (!ldata) in n_tty_open()
1918 ldata->overrun_time = jiffies; in n_tty_open()
1919 mutex_init(&ldata->atomic_read_lock); in n_tty_open()
1920 mutex_init(&ldata->output_lock); in n_tty_open()
1922 tty->disc_data = ldata; in n_tty_open()
1933 struct n_tty_data *ldata = tty->disc_data; in input_available_p() local
1936 if (ldata->icanon && !L_EXTPROC(tty)) in input_available_p()
1937 return ldata->canon_head != ldata->read_tail; in input_available_p()
1939 return ldata->commit_head - ldata->read_tail >= amt; in input_available_p()
1967 struct n_tty_data *ldata = tty->disc_data; in copy_from_read_buf() local
1971 size_t head = smp_load_acquire(&ldata->commit_head); in copy_from_read_buf()
1972 size_t tail = ldata->read_tail & (N_TTY_BUF_SIZE - 1); in copy_from_read_buf()
1975 n = min(head - ldata->read_tail, N_TTY_BUF_SIZE - tail); in copy_from_read_buf()
1978 unsigned char *from = read_buf_addr(ldata, tail); in copy_from_read_buf()
1984 smp_store_release(&ldata->read_tail, ldata->read_tail + n); in copy_from_read_buf()
1986 if (L_EXTPROC(tty) && ldata->icanon && is_eof && in copy_from_read_buf()
1987 (head == ldata->read_tail)) in copy_from_read_buf()
2022 struct n_tty_data *ldata = tty->disc_data; in canon_copy_from_read_buf() local
2032 n = min(*nr + 1, smp_load_acquire(&ldata->canon_head) - ldata->read_tail); in canon_copy_from_read_buf()
2034 tail = ldata->read_tail & (N_TTY_BUF_SIZE - 1); in canon_copy_from_read_buf()
2040 eol = find_next_bit(ldata->read_flags, size, tail); in canon_copy_from_read_buf()
2044 eol = find_next_bit(ldata->read_flags, more, 0); in canon_copy_from_read_buf()
2054 if (!found || read_buf(ldata, eol) != __DISABLED_CHAR) { in canon_copy_from_read_buf()
2069 clear_bit(eol, ldata->read_flags); in canon_copy_from_read_buf()
2070 smp_store_release(&ldata->read_tail, ldata->read_tail + c); in canon_copy_from_read_buf()
2073 if (!ldata->push) in canon_copy_from_read_buf()
2074 ldata->line_start = ldata->read_tail; in canon_copy_from_read_buf()
2076 ldata->push = 0; in canon_copy_from_read_buf()
2135 struct n_tty_data *ldata = tty->disc_data; in n_tty_read() local
2153 if (!mutex_trylock(&ldata->atomic_read_lock)) in n_tty_read()
2156 if (mutex_lock_interruptible(&ldata->atomic_read_lock)) in n_tty_read()
2164 if (!ldata->icanon) { in n_tty_read()
2175 tail = ldata->read_tail; in n_tty_read()
2234 if (ldata->icanon && !L_EXTPROC(tty)) { in n_tty_read()
2266 if (tail != ldata->read_tail) in n_tty_read()
2271 mutex_unlock(&ldata->atomic_read_lock); in n_tty_read()
2352 struct n_tty_data *ldata = tty->disc_data; in n_tty_write() local
2355 mutex_lock(&ldata->output_lock); in n_tty_write()
2357 mutex_unlock(&ldata->output_lock); in n_tty_write()
2429 static unsigned long inq_canon(struct n_tty_data *ldata) in inq_canon() argument
2433 if (ldata->canon_head == ldata->read_tail) in inq_canon()
2435 head = ldata->canon_head; in inq_canon()
2436 tail = ldata->read_tail; in inq_canon()
2440 if (test_bit(tail & (N_TTY_BUF_SIZE - 1), ldata->read_flags) && in inq_canon()
2441 read_buf(ldata, tail) == __DISABLED_CHAR) in inq_canon()
2451 struct n_tty_data *ldata = tty->disc_data; in n_tty_ioctl() local
2460 retval = inq_canon(ldata); in n_tty_ioctl()
2462 retval = read_cnt(ldata); in n_tty_ioctl()