diff options
Diffstat (limited to 'drivers/char/ChangeLog')
| -rw-r--r-- | drivers/char/ChangeLog | 192 |
1 files changed, 191 insertions, 1 deletions
diff --git a/drivers/char/ChangeLog b/drivers/char/ChangeLog index 78f1fb332..da6f8befc 100644 --- a/drivers/char/ChangeLog +++ b/drivers/char/ChangeLog @@ -1,3 +1,193 @@ +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 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 <dhinds@allegro.stanford.edu> + + * 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 @@ -130,7 +320,7 @@ Fri Sep 16 08:13:25 1994 Theodore Y. Ts'o (tytso@rt-11) 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 its called. + set before it's called. Thu Sep 15 23:34:01 1994 Theodore Y. Ts'o (tytso@rt-11) |