+++ /dev/null
-2001-08-11 Tim Waugh <twaugh@redhat.com>
-
- * serial.c (get_pci_port): Deal with awkward Titan cards.
-
-1998-08-26 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * serial.c (rs_open): Correctly decrement the module in-use count
- on errors.
-
-Thu Feb 19 14:24:08 1998 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * tty_io.c (tty_name): Remove the non-reentrant (and non-SMP safe)
- version of tty_name, and rename the reentrant _tty_name
- function to be tty_name.
- (tty_open): Add a warning message stating callout devices
- are deprecated.
-
-Mon Dec 1 08:24:15 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * tty_io.c (tty_get_baud_rate): Print a warning syslog if the
- tty->alt_speed kludge is used; this means the system is
- using the deprecated SPD_HI ioctls.
-
-Mon Nov 24 10:37:49 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * serial.c, esp.c, rocket.c: Change drivers to take advantage of
- tty_get_baud_rate().
-
- * tty_io.c (tty_get_baud_rate): New function which computes the
- correct baud rate for the tty. More factoring out of
- common code out of the serial driver to the high-level tty
- functions....
-
-Sat Nov 22 07:53:36 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * serial.c, esp.c, rocket.c: Add tty->driver.break() routine, and
- allow high-level tty code to handle the break and soft
- carrier ioctls.
-
- * tty_ioctl.c (n_tty_ioctl): Support TIOCGSOFTCAR and
- TIOCSSOFTCAR, so that device drivers don't have to support
- it.
-
- * serial.c (autoconfig): Change 16750 test to hopefully eliminate
- false results by people with strange 16550As being
- detected as 16750s. Hopefully 16750s will still be
- detected as 16750, and other weird UARTs won't get poorly
- autodetected. If this doesn't work, I'll have to disable
- the auto identification for the 16750.
-
- * tty_io.c (tty_hangup): Now actually do the tty hangup
- processing during the timer processing, and disable
- interrupts while doing the hangup processing. This avoids
- several nasty race conditions which happened when the
- hangup processing was done asynchronously.
- (tty_ioctl): Do break handling in the tty driver if
- driver's break function is supported.
- (tty_flip_buffer_push): New exported function which should
- be used by drivers to push characters in the flip buffer
- to the tty handler. This may either be done using a task
- queue function for better CPU efficiency, or directly for
- low latency operation.
-
- * serial.c (rs_set_termios): Fix bug rs_set_termios when
- transitioning away from B0, submitted by Stanislav
- Voronyi.
-
-Thu Jun 19 20:05:58 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * serial.c (begin_break, end_break, rs_ioctl): Applied patch
- to support BSD ioctls to set and clear the break
- condition explicitly.
-
- * console.c (scrup, scrdown, insert_line, delete_line): Applied
- fix suggested by Aaron Tiensivu to speed up block scrolls
- up and down.
-
- * n_tty.c (opost_block, write_chan): Added a modified "fast
- console" patch which processes a block of text via
- "cooking" efficiently.
-
-Wed Jun 18 15:25:50 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * tty_io.c (init_dev, release_dev): Applied fix suggested by Bill
- Hawes to prevent race conditions in the tty code.
-
- * n_tty.c (n_tty_chars_in_buffer): Applied fix suggested by Bill
- Hawes so that n_tty_chars_in_buffer returns the correct
- value in the case when the tty is in cannonical mode. (To
- avoid a pty deadlock with telnetd.)
-
-Thu Feb 27 01:53:08 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * serial.c (change_speed): Add support for the termios flag
- CMSPAR, which allows the user to select stick parity.
- (i.e, if PARODD is set, the parity bit is always 1; if
- PARRODD is not set, then the parity bit is always 0).
-
-Wed Feb 26 19:03:10 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * serial.c (cleanup_module): Fix memory leak when using the serial
- driver as a module; make sure tmp_buf gets freed!
-
-Tue Feb 25 11:01:59 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * serial.c (set_modem_info): Add support for setting and clearing
- the OUT1 and OUT2 bits. (For special case UART's, usually
- for half-duplex.)
- (autoconfig, change_speed): Fix TI 16750 support.
-
-Sun Feb 16 00:14:43 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * tty_io.c (release_dev): Add sanity check to make sure there are
- no waiters on tty->read_wait or tty->write_wait.
-
- * serial.c (rs_init): Don't autoconfig a device if the I/O region
- is already reserved.
-
- * serial.c (serial_proc_info): Add support for /proc/serial.
-
-Thu Feb 13 00:49:10 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * serial.c (receive_chars): When the UART repotrs an overrun
- condition, it does so with a valid character. Changed to
- not throw away the valid character, but instead report the
- overrun after the valid character.
-
- * serial.c: Added new #ifdef's for some of the advanced serial
- driver features. A minimal driver that only supports COM
- 1/2/3/4 without sharing serial interrupts only takes 17k;
- the full driver takes 32k.
-
-Wed Feb 12 14:50:44 1997 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * vt.c:
- * pty.c:
- * tty_ioctl.c:
- * serial.c: Update routines to use the new 2.1 memory access
- routines.
-
-Wed Dec 4 07:51:52 1996 Theodore Ts'o <tytso@localhost.mit.edu>
-
- * serial.c (change_speed): Use save_flags(); cli() and
- restore_flags() in order to ensure we don't accidentally
- turn on interrupts when starting up the port.
- (startup): Move the insertion of serial structure into the
- IRQ chain earlier into the startup processing. Interrupts
- should be off this whole time, but we eventually will want
- to reduce this window.
-
-Thu Nov 21 10:05:22 1996 Theodore Ts'o <tytso@localhost.mit.edu>
-
- * tty_ioctl.c (tty_wait_until_sent): Always check the driver
- wait_until_ready routine, even if there are no characters
- in the xmit buffer. (There may be charactes in the device
- FIFO.)
- (n_tty_ioctl): Add new flag tty->flow_stopped which
- indicates whether the tty is stopped due to a request by
- the TCXONC ioctl (used by tcflow). If so, don't let an
- incoming XOFF character restart the tty. The tty can only
- be restarted by another TCXONC request.
-
- * tty_io.c (start_tty): Don't allow the tty to be restarted if
- tty->flow_stopped is true.
-
- * n_tty.c (n_tty_receive_char): If tty->flow_stopped is true, and
- IXANY is set, don't eat a character trying to restart the
- tty.
-
- * serial.c (startup): Remove need for MCR_noint from the
- async_struct structure. Only turn on DTR and RTS if the
- baud rate is not zero.
- (change_speed): More accurately calculate the timeout
- value based on the word size. Move responsibility of
- hangup when speed becomes B0 to rs_set_termios()
- (set_serial_info): When changing the UART type set the
- current xmit_fifo_size as well as the permanent
- xmit_fifo_size.
- (rs_ioctl): Fix TCSBRK (used by tcdrain) and TCSBRKP
- ioctls to return EINTR if interrupted by a signal.
- (rs_set_termios): If the baud rate changes to or from B0,
- this function is now responsible for setting or clearing
- DTR and RTS. DTR and RTS are only be changed on the
- transition to or from the B0 state.
- (rs_close): Wait for the characters to drain based on
- info->timeout. At low baud rates (50 bps), it may take a
- long time for the FIFO to completely drain out!
- (rs_wait_until_sent): Fixed timeout handling. Now
- releases control to the scheduler, but checks frequently
- enough so that the function is sensitive enough to pass
- the timing requirements of the NIST-PCTS.
- (block_til_ready): When opening the device, don't turn on
- DTR and RTS if the baud rate is B0.
-
-Thu Nov 14 00:06:09 1996 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * serial.c (autoconfig): Fix autoconfiguration problems;
- info->flags wasn't getting initialized from the state
- structure. Put in more paranoid test for the 16750.
-
-Fri Nov 8 20:19:50 1996 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * n_tty.c (n_tty_flush_buffer): Only call driver->unthrottle() if
- the tty was previous throttled.
- (n_tty_set_termios, write_chan): Add changes suggested by
- Simon P. Allen to allow hardware cooking.
-
- * tty_ioctl.c (set_termios): If we get a signal while waiting for
- the tty to drain, return -EINTR.
-
- * serial.c (change_speed): Add support for CREAD, as required by
- POSIX.
-
-Sat Nov 2 20:43:10 1996 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * serial.c: Wholesale changes. Added support for the Startech
- 16650 and 16650V2 chips. (WARNING: the new startech
- 16650A may or may not work!) Added support for the
- TI16750 (not yet tested). Split async_struct into a
- transient part (async_struct) and a permanent part
- (serial_state) which contains the configuration
- information for the ports. Added new driver routines
- wait_until_sent() and send_xchar() to help with POSIX
- compliance. Added support for radio clocks which waggle
- the carrier detect line (CONFIG_HARD_PPS).
-
- * tty_ioctl.c (tty_wait_until_sent): Added call to new driver
- function tty->driver.wait_until_sent(), which returns when
- the tty's device xmit buffers are drained. Needed for
- full POSIX compliance.
-
- (send_prio_char): New function, called by the ioctl's
- TCIOFF and TCION; uses the new driver call send_xchar(),
- which will send the XON or XOFF character at high priority
- (and even if tty output is stopped).
-
-Wed Jun 5 18:52:04 1996 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * pty.c (pty_close): When closing a pty, make sure packet mode is
- cleared.
-
-Sun May 26 09:33:52 1996 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * vesa_blank.c (set_vesa_blanking): Add missing verify_area() call.
-
- * selection.c (set_selection): Add missing verify_area() call.
-
- * tty_io.c (tty_ioctl): Add missing verify_area() calls.
-
- * serial.c (rs_ioctl): Add missing verify_area() calls.
- (rs_init): Allow initialization of serial driver
- configuration from a module.
-
- * random.c (extract_entropy): Add missing verify_area call.
- Don't limit number of characters returned to
- 32,768. Extract entropy is now no longer a inlined
- function.
-
- (random_read): Check return value in case extract_entropy
- returns an error.
-
- (secure_tcp_sequence_number): New function which returns a
- secure TCP sequence number. This is needed to prevent some
- nasty TCP hijacking attacks.
-
- (init_std_data): Initialize using gettimeofday() instead of
- struct timeval xtime.
-
- (fast_add_entropy_word, add_entropy_word): Rename the
- inline function add_entropy_word() to
- fast_add_entropy_word(). Make add_entropy_word() be the
- non-inlined function which is used in non-timing critical
- places, in order to save space.
-
- (initialize_benchmark, begin_benchmark, end_benchmark): New
- functions defined when RANDOM_BENCHMARK is defined. They
- allow us to benchmark the speed of the
- add_timer_randomness() call.
-
- (int_ln, rotate_left): Add two new inline functions with
- i386 optimized asm instructions. This speeds up the
- critical add_entropy_word() and add_timer_randomness()
- functions, which are called from interrupt handlers.
-
-Tue May 7 22:51:11 1996 <tytso@rsts-11.mit.edu>
-
- * random.c (add_timer_randomness): Limit the amount randomness
- that we estimate to 12 bits. (An arbitrary amount).
-
- (extract_entropy): To make it harder to analyze the hash
- function, fold the hash function in half using XOR, and
- use the folded result as the value to emit to the user.
- Also, add timer randomness each pass through the
- exact_entropy call, to increase the amount of unknown
- values during the extraction process.
-
- (random_ioctl): Use IOR/IOW definitions to define the
- ioctl values used by the /dev/random driver. Allow the
- old ioctl values to be used for backwards compatibility
- (for a limited amount of time).
-
-Wed Apr 24 14:02:04 1996 Theodore Ts'o <tytso@rsts-11.mit.edu>
-
- * random.c (add_timer_randomness): Use 2nd derivative as well to
- better estimate entropy.
-
- (rand_initialize): Explicitly initialize all the pointers
- to NULL. (Clearing pointers using memset isn't portable.)
- Initialize the random pool with OS-dependent data.
-
- (random_write): Add sanity checking to the arguments to
- random_write(), so that bad arguments won't cause a kernel
- SEGV.
-
- (random_read): Update the access time of the device inode
- when you return data to the user.
-
- (random_ioctl): Wake up the random_wait channel when there
- are only WAIT_INPUT_BITS available. Add more paranoia
- checks to make sure entropy_count doesn't go beyond the
- bounds of (0, POOLSIZE). Add a few missing verify_area
- checks. Add support for the RNDCLEARPOOL ioctl, which
- zaps the random pool.
-
- (add_timer_randomness): Wake up the random_wait
- channel only when there are WAIT_INPUT_BITS available.
-
- (random_select): Allow a random refresh daemon process to
- select on /dev/random for writing; wake up the daemon when
- there are less than WAIT_OUTPUT_BITS bits of randomness
- available.
-
-Tue Apr 23 22:56:07 1996 <tytso@rsts-11.mit.edu>
-
- * tty_io.c (init_dev): Change return code when user attempts to
- open master pty which is already open from EAGAIN to EIO,
- to match with BSD expectations. EIO is more correct
- anyway, since EAGAIN implies that retrying will be
- successful --- which it might be.... Eventually!!
-
- * pty.c (pty_open, pty_close): Fix wait loop so that we don't
- busy loop while waiting for the master side to open.
- Fix tty opening/closing logic. TTY_SLAVE_CLOSED was
- renamed to TTY_OTHER_CLOSED, so that the name is more
- descriptive. Also fixed code so that the tty flag
- actually works correctly now....
-
-Mon Apr 1 10:22:01 1996 <tytso@rsts-11.mit.edu>
-
- * serial.c (rs_close): Cleaned up modularization changes.
- Remove code which forced line discipline back to N_TTY
- this is done in the tty upper layers, and there's no
- reason to do it here. (Making this change also
- removed the requirement that the serial module access
- the internal kernel symbol "ldiscs".)
-
- * tty_io.c (tty_init): Formally register a tty_driver entry for
- /dev/tty (device 4, 0) and /dev/console (device 5, 0).
- This guarantees that major device numbers 4 and 5 will be
- reserved for the tty subsystem (as they have to be because
- of /dev/tty and /dev/console). Removed tty_regdev, as
- this interface is no longer necessary.
-
-Sun Mar 17 20:42:47 GMT 1996 <ah@doc.ic.ac.uk>
-
- * serial.c : modularisation (changes in linux/fs/device.c allow
- kerneld to automatically load the serial module).
-
- * Makefile, Config.in : serial modularisation adds.
-
- * tty_io.c : tty_init_ctty used by to register "cua" driver just
- for the /dev/tty device (5,0). Added tty_regdev.
-
- * serial.c (shutdown, rs_ioctl) : when port shuts down wakeup processes
- waiting on delta_msr_wait. The TIOCMIWAIT ioctl returns EIO
- if no change was done since the time of call.
-
-Sat Mar 16 14:33:13 1996 <aeb@cwi.nl>
-
- * tty_io.c (disassociate_ctty): If disassociate_ctty is called by
- exit, do not perform an implicit vhangup on a pty.
-
-Fri Feb 9 14:15:47 1996 <tytso@rsts-11.mit.edu>
-
- * serial.c (block_til_ready): Fixed another race condition which
- happens if a hangup happens during the open.
-
-Wed Jan 10 10:08:00 1996 <tytso@rsts-11.mit.edu>
-
- * serial.c (block_til_ready): Remove race condition which happened
- if a hangup condition happened during the setup of the
- UART, before rs_open() called block_til_ready(). This
- caused the info->count counter to be erroneously
- decremented.
-
- * serial.c (startup, rs_open): Remove race condition that could
- cause a memory leak of one page. (Fortunately, both race
- conditions were relatively rare in practice.)
-
-Tue Dec 5 13:21:27 1995 <tytso@rsts-11.mit.edu>
-
- * serial.c (check_modem_status, rs_ioctl): Support the new
- ioctl()'s TIOCGICOUNT, TIOCMIWAIT. These allow an
- application program to wait on a modem serial register
- status bit change, and to find out how many changes have
- taken place for the MSR bits.
-
- (rs_write): Eliminate a race condition which is introduced
- if it is necessary to wait for the semaphore.
-
-Sat Nov 4 17:14:45 1995 <tytso@rsts-11.mit.edu>
-
- * tty_io.c (tty_init): Move registration of TTY_MAJOR and
- TTY_AUX_MAJOR to the end, so that /proc/devices looks
- prettier.
-
- * pty.c (pty_init): Use new major numbers for PTY master and slave
- devices. This allow us to have more than 64 pty's. We
- register the old pty devices for backwards compatibility.
- Note that a system should either be using the old pty
- devices or the new pty devices --- in general, it should
- try to use both, since they map into the same pty table.
- The old pty devices are strictly for backwards compatibility.
-
-Wed Oct 11 12:45:24 1995 <tytso@rsts-11.mit.edu>
-
- * tty_io.c (disassociate_ctty): If disassociate_ctty is called by
- exit, perform an implicit vhangup on the tty.
-
- * pty.c (pty_close): When the master pty is closed, send a hangup
- to the slave pty.
- (pty_open): Use the flag TTY_SLAVE_CLOSED to test to see
- if there are any open slave ptys, instead of using
- tty->link->count. The old method got confused if there
- were processes that had hung-up file descriptors on the
- slave tty.
-
-Tue May 2 00:53:25 1995 <tytso@rsx-11.mit.edu>
-
- * tty_io.c (tty_set_ldisc): Wait until the output buffer is
- drained before closing the old line discipline --- needed
- in only one case: XON/XOFF processing.
-
- * n_tty.c (n_tty_close): Don't bother waiting until the output
- driver is closed; in general, the line discipline
- shouldn't care if the hardware is finished
- transmitting before the line discipline terminates.
-
- * tty_io.c (release_dev): Shutdown the line discipline after
- decrementing the tty count variable; but set the
- TTY_CLOSING flag so that we know that this tty structure
- isn't long for this world.
-
- * tty_io.c (init_dev): Add sanity code to check to see if
- TTY_CLOSING is set on a tty structure; if so, something
- bad has happened (probably a line discipline close blocked
- when it shouldn't have; so do a kernel printk and then
- return an error).
-
-Wed Apr 26 10:23:44 1995 Theodore Y. Ts'o <tytso@localhost>
-
- * tty_io.c (release_dev): Try to shutdown the line discipline
- *before* decrementing the tty count variable; this removes
- a potential race condition which occurs when the line
- discipline close blocks, and another process then tries
- open the same serial port.
-
- * serial.c (rs_hangup): When hanging up, flush the output buffer
- before shutting down the UART. Otherwise the line
- discipline close blocks waiting for the characters to get
- flushed, which never happens until the serial port gets reused.
-
-Wed Apr 12 08:06:16 1995 Theodore Y. Ts'o <tytso@localhost>
-
- * serial.c (do_serial_hangup, do_softint, check_modem_status,
- rs_init): Hangups are now scheduled via a separate tqueue
- structure in the async_struct structure, tqueue_hangup.
- This task is pushed on to the tq_schedule queue, so that
- it is processed synchronously by the scheduler.
-
-Sat Feb 18 12:13:51 1995 Theodore Y. Ts'o (tytso@rt-11)
-
- * tty_io.c (disassociate_ctty, tty_open, tty_ioctl): Clear
- current->tty_old_pgrp field when a session leader
- acquires a controlling tty, and after a session leader
- has disassociated from a controlling tty.
-
-Fri Feb 17 09:34:09 1995 Theodore Y. Ts'o (tytso@rt-11)
-
- * serial.c (rs_interrupt_single, rs_interrupt, rs_interrupt_multi):
- Change the number of passes made from 64 to be 256,
- configurable with the #define RS_ISR_PASS_LIMIT.
-
- * serial.c (rs_init, set_serial_info, get_serial_info, rs_close):
- Remove support for closing_wait2. Instead, set
- tty->closing and rely on the line discipline to prevent
- echo wars.
-
- * n_tty.c (n_tty_receive_char): IEXTEN does not need to be
- enabled in order for IXANY to be active.
-
- If tty->closing is set, then only process XON and XOFF
- characters.
-
-Sun Feb 12 23:57:48 1995 Theodore Y. Ts'o (tytso@rt-11)
-
- * serial.c (rs_timer): Change the interrupt poll time from 60
- seconds to 10 seconds, configurable with the #define
- RS_STROBE_TIME.
-
- * serial.c (rs_interrupt_multi, startup, shutdown, rs_ioctl,
- set_multiport_struct, get_multiport_struct): Add
- provisions for a new type of interrupt service routine,
- which better supports multiple serial ports on a single
- IRQ.
-
-Sun Feb 5 19:35:11 1995 Theodore Y. Ts'o (tytso@rt-11)
-
- * tty_ioctl.c (n_tty_ioctl, set_termios, tty_wait_until_sent):
- * serial.c (rs_ioctl, rs_close):
- * cyclades.c (cy_ioctl, cy_close):
- * n_tty.c (n_tty_close): Rename wait_until_sent to
- tty_wait_until_sent, so that it's a better name to export
- in ksyms.c.
-
-Sat Feb 4 23:36:20 1995 Theodore Y. Ts'o (tytso@rt-11)
-
- * serial.c (rs_close): Added missing check for closing_wait2 being
- ASYNC_CLOSING_WAIT_NONE.
-
-Thu Jan 26 09:02:49 1995 Theodore Y. Ts'o (tytso@rt-11)
-
- * serial.c (rs_init, set_serial_info, get_serial_info,
- rs_close): Support close_wait in the serial driver.
- This is helpful for slow devices (like serial
- plotters) so that their outputs don't get flushed upon
- device close. This has to be configurable because
- normally we don't want ports to be hung up for long
- periods of time during a close when they are not
- connected to a device, or the device is powered off.
-
- The default is to wait 30 seconds; in the case of a
- very slow device, the close_wait timeout should be
- lengthened. If it is set to 0, the kernel will wait
- forever for all of the data to be transmitted.
-
-Thu Jan 17 01:17:20 1995 Theodore Y. Ts'o (tytso@rt-11)
-
- * serial.c (startup, change_speed, rs_init): Add support to detect
- the StarTech 16650 chip. Treat it as a 16450 for now,
- because of its FIFO bugs.
-
-Thu Jan 5 21:21:57 1995 <dahinds@users.sourceforge.net>
-
- * serial.c: (receive_char): Added counter to prevent infinite loop
- when a PCMCIA serial device is ejected.
-
-Thu Dec 29 17:53:48 1994 <tytso@rsx-11.mit.edu>
-
- * tty_io.c (check_tty_count): New procedure which checks
- tty->count to make sure that it matches with the number of
- open file descriptors which point at the structure. If
- the number doesn't match, it prints a warning message.
-
-Wed Dec 28 15:41:51 1994 <tytso@rsx-11.mit.edu>
-
- * tty_io.c (do_tty_hangup, disassociate_ctty): At hangup time,
- save the tty's current foreground process group in the
- session leader's task structure. When the session leader
- terminates, send a SIGHUP, SIGCONT to that process group.
- This is not required by POSIX, but it's not prohibited
- either, and it appears to be the least intrusive way
- to fix a problem that dialup servers have with
- orphaned process groups caused by modem hangups.
-
-Thu Dec 8 14:52:11 1994 <tytso@rsx-11.mit.edu>
-
- * serial.c (rs_ioctl): Don't allow most ioctl's if the serial port
- isn't initialized.
-
- * serial.c (rs_close): Don't clear the IER if the serial port
- isn't initialized.
-
- * serial.c (block_til_ready): Don't try to block on the dialin
- port if the serial port isn't initialized.
-
-Wed Dec 7 10:48:30 1994 Si Park (si@wimpol.demon.co.uk)
- * tty_io.c (tty_register_driver): Fix bug when linking onto
- the tty_drivers list. We now test that there are elements
- already on the list before setting the back link from the
- first element to the new driver.
-
- * tty_io.c (tty_unregister_driver): Fix bug in unlinking the
- specified driver from the tty_drivers list. We were not
- setting the back link correctly. This used to result in
- a dangling back link pointer and cause panics on the next
- call to get_tty_driver().
-
-Tue Nov 29 10:21:09 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * tty_io.c (tty_unregister_driver): Fix bug in
- tty_unregister_driver where the pointer to the refcount is
- tested, instead of the refcount itself. This caused
- tty_unregister_driver to always return EBUSY.
-
-Sat Nov 26 11:59:24 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * tty_io.c (tty_ioctl): Add support for the new ioctl
- TIOCTTYGSTRUCT, which allow a kernel debugging program
- direct read access to the tty and tty_driver structures.
-
-Fri Nov 25 17:26:22 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * serial.c (rs_set_termios): Don't wake up processes blocked in
- open when the CLOCAL flag changes, since a blocking
- open only samples the CLOCAL flag once when it blocks,
- and doesn't check it again. (n.b. FreeBSD has a
- different behavior for blocking opens; it's not clear
- whether Linux or FreeBSD's interpretation is correct.
- POSIX doesn't give clear guidance on this issue, so
- this may change in the future....)
-
- * serial.c (block_til_ready): Use the correct termios structure to
- check the CLOCAL flag. If the cuaXX device is active,
- then check the saved termios for the ttySXX device.
- Otherwise, use the currently active termios structure.
-
-Sun Nov 6 21:05:44 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * serial.c (change_speed): Add support for direct access of
- 57,600 and 115,200 bps.
-
-Wed Nov 2 10:32:36 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * n_tty.c (n_tty_receive_room): Only allow excess characters
- through if we are in ICANON mode *and* there are other no
- pending lines in the buffer. Otherwise cut and paste over
- 4k breaks.
-
-Sat Oct 29 18:17:34 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * serial.c (rs_ioctl, get_lsr_info): Added patch suggested by Arne
- Riiber so that user mode programs can tell when the
- transmitter shift register is empty.
-
-Thu Oct 27 23:14:29 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * tty_ioctl.c (wait_until_sent): Added debugging printk statements
- (under the #ifdef TTY_DEBUG_WAIT_UNTIL_SENT)
-
- * serial.c (rs_interrupt, rs_interrupt_single, receive_chars,
- change_speed, rs_close): rs_close now disables receiver
- interrupts when closing the serial port. This allows the
- serial port to close quickly when Linux and a modem (or a
- mouse) are engaged in an echo war; when closing the serial
- port, we now first stop listening to incoming characters,
- and *then* wait for the transmit buffer to drain.
-
- In order to make this change, the info->read_status_mask
- is now used to control what bits of the line status
- register are looked at in the interrupt routine in all
- cases; previously it was only used in receive_chars to
- select a few of the status bits.
-
-Mon Oct 24 23:36:21 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * serial.c (rs_close): Add a timeout to the transmitter flush
- loop; this is just a sanity check in case we have flaky
- (or non-existent-but-configured-by-the-user) hardware.
-
-Fri Oct 21 09:37:23 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * tty_io.c (tty_fasync): When asynchronous I/O is enabled, if the
- process or process group has not be specified yet, set it
- to be the tty's process group, or if that is not yet set,
- to the current process's pid.
-
-Thu Oct 20 23:17:28 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * n_tty.c (n_tty_receive_room): If we are doing input
- canonicalization, let as many characters through as
- possible, so that the excess characters can be "beeped".
-
-Tue Oct 18 10:02:43 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * serial.c (rs_start): Removed an incorrect '!' that was
- preventing transmit interrupts from being re-enabled in
- rs_start(). Fortunately in most cases it would be
- re-enabled elsewhere, but this still should be fixed
- correctly.
-
-Sun Oct 9 23:46:03 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * tty_io.c (do_tty_hangup): If the tty driver flags
- TTY_DRIVER_RESET_TERMIOS is set, then reset the termios
- settings back to the driver's initial configuration. This
- allows the termios settings to be reset even if a process
- has hung up file descriptors keeping a pty's termios from
- being freed and reset.
-
- * tty_io.c (release_dev): Fix memory leak. The pty's other
- termios structure should also be freed.
-
- * serial.c (rs_close, shutdown): Change how we wait for the
- transmitter to completely drain before shutting down the
- serial port. We now do it by scheduling in another
- process instead of busy looping with the interrupts turned
- on. This may eliminate some race condition problems that
- some people seem to be reporting.
-
-Sun Sep 25 14:18:14 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * tty_io.c (release_dev): When freeing a tty make sure that both
- the tty and the o_tty (if present) aren't a process's
- controlling tty. (Previously, we only checked the tty.)
-
- * serial.c (change_speed): Only enable the Modem Status
- Interrupt for a port if CLOCAL is not set or CRTSCTS
- is set. If we're not checking the carrier detect and
- CTS line, there's no point in enabling the modem
- status interrupt. This will save spurious interrupts
- from slowing down systems who have terminals that
- don't support either line. (Of course, if you want
- only one of CD and CTS support, you will need a
- properly wired serial cable.)
-
-Thu Sep 22 08:32:48 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * tty_io.c (do_SAK): Return if tty is null.
-
- * tty_io.c (_tty_name): Return "NULL tty" if the passed in tty is
- NULL.
-
-Sat Sep 17 13:19:25 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * tty_ioctl.c (n_tty_ioctl): Fix TIOCGLCKTRMIOS and
- TIOCSLCKTRMIOS, which were totally broken. Remove
- extra indirection from argument; it should be a struct
- termios *, not a struct termios **.
- &real_tty->termios_locked should have been
- real_tty->termios_locked. This caused us to be
- reading and writing the termios_locked structure to
- random places in kernel memory.
-
- * tty_io.c (release_dev): Oops! Forgot to delete a critical kfree
- of the locked_termios. This leaves the locked_termios
- structure pointed at a freed object.
-
-Fri Sep 16 08:13:25 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * tty_io.c (tty_open): Don't check for an exclusive open until
- after the device specific open routine has been called.
- Otherwise, the serial device ref counting will be screwed
- up.
-
- * serial.c (rs_open, block_til_ready): Don't set termios structure
- until after block_til_ready has returned successfully.
- Modify block_til_ready to check the normal_termios
- structure directly, so it doesn't rely on termios being
- set before it's called.
-
-Thu Sep 15 23:34:01 1994 Theodore Y. Ts'o (tytso@rt-11)
-
- * serial.c (rs_close): Turn off interrupts during rs_close() to
- prevent a race condition with the hangup code (which
- runs during a software interrupt).
-
- * tty_io.c (release_dev): Don't free the locked_termios structure;
- its state must be retained across device opens.
-
-
- * tty_io.c (tty_unregister_driver): Added function to unregister a
- tty driver. (For loadable device drivers.)
-
-
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