diff options
Diffstat (limited to 'drivers/char/ChangeLog')
| -rw-r--r-- | drivers/char/ChangeLog | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/drivers/char/ChangeLog b/drivers/char/ChangeLog index da6f8befc..71f60ba9a 100644 --- a/drivers/char/ChangeLog +++ b/drivers/char/ChangeLog @@ -1,3 +1,246 @@ +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 |