diff options
author | Jonathan Corbet <corbet@lwn.net> | 2010-02-18 11:52:00 -0500 |
---|---|---|
committer | Jiri Kosina <jkosina@suse.cz> | 2010-02-18 17:05:57 -0500 |
commit | 1ef8a5be834117fa54db6cb595fc2d45c14a38cf (patch) | |
tree | abfd1069db4d17b4e59d35c7b3c213c85bc89361 | |
parent | cb2992a60b7e73fbabe9ffe54056eed0022f2ed2 (diff) |
Remove drivers/char/ChangeLog
The ChangeLog file under drivers/char is 30K of stuff dedicated to the
mid-90's TTY exploits of Ted Ts'o; it has been updated once since 1998
- and that was in 2001. It's interesting history, but we don't
normally carry that kind of history inline with the code. Let's remove
it.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Acked-by: Alan Cox <alan@linux.intel.com>
Acked-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
-rw-r--r-- | drivers/char/ChangeLog | 775 |
1 files changed, 0 insertions, 775 deletions
diff --git a/drivers/char/ChangeLog b/drivers/char/ChangeLog deleted file mode 100644 index 56b8a2e76ab1..000000000000 --- a/drivers/char/ChangeLog +++ /dev/null | |||
@@ -1,775 +0,0 @@ | |||
1 | 2001-08-11 Tim Waugh <twaugh@redhat.com> | ||
2 | |||
3 | * serial.c (get_pci_port): Deal with awkward Titan cards. | ||
4 | |||
5 | 1998-08-26 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
6 | |||
7 | * serial.c (rs_open): Correctly decrement the module in-use count | ||
8 | on errors. | ||
9 | |||
10 | Thu Feb 19 14:24:08 1998 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
11 | |||
12 | * tty_io.c (tty_name): Remove the non-reentrant (and non-SMP safe) | ||
13 | version of tty_name, and rename the reentrant _tty_name | ||
14 | function to be tty_name. | ||
15 | (tty_open): Add a warning message stating callout devices | ||
16 | are deprecated. | ||
17 | |||
18 | Mon Dec 1 08:24:15 1997 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
19 | |||
20 | * tty_io.c (tty_get_baud_rate): Print a warning syslog if the | ||
21 | tty->alt_speed kludge is used; this means the system is | ||
22 | using the deprecated SPD_HI ioctls. | ||
23 | |||
24 | Mon Nov 24 10:37:49 1997 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
25 | |||
26 | * serial.c, esp.c, rocket.c: Change drivers to take advantage of | ||
27 | tty_get_baud_rate(). | ||
28 | |||
29 | * tty_io.c (tty_get_baud_rate): New function which computes the | ||
30 | correct baud rate for the tty. More factoring out of | ||
31 | common code out of the serial driver to the high-level tty | ||
32 | functions.... | ||
33 | |||
34 | Sat Nov 22 07:53:36 1997 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
35 | |||
36 | * serial.c, esp.c, rocket.c: Add tty->driver.break() routine, and | ||
37 | allow high-level tty code to handle the break and soft | ||
38 | carrier ioctls. | ||
39 | |||
40 | * tty_ioctl.c (n_tty_ioctl): Support TIOCGSOFTCAR and | ||
41 | TIOCSSOFTCAR, so that device drivers don't have to support | ||
42 | it. | ||
43 | |||
44 | * serial.c (autoconfig): Change 16750 test to hopefully eliminate | ||
45 | false results by people with strange 16550As being | ||
46 | detected as 16750s. Hopefully 16750s will still be | ||
47 | detected as 16750, and other weird UARTs won't get poorly | ||
48 | autodetected. If this doesn't work, I'll have to disable | ||
49 | the auto identification for the 16750. | ||
50 | |||
51 | * tty_io.c (tty_hangup): Now actually do the tty hangup | ||
52 | processing during the timer processing, and disable | ||
53 | interrupts while doing the hangup processing. This avoids | ||
54 | several nasty race conditions which happened when the | ||
55 | hangup processing was done asynchronously. | ||
56 | (tty_ioctl): Do break handling in the tty driver if | ||
57 | driver's break function is supported. | ||
58 | (tty_flip_buffer_push): New exported function which should | ||
59 | be used by drivers to push characters in the flip buffer | ||
60 | to the tty handler. This may either be done using a task | ||
61 | queue function for better CPU efficiency, or directly for | ||
62 | low latency operation. | ||
63 | |||
64 | * serial.c (rs_set_termios): Fix bug rs_set_termios when | ||
65 | transitioning away from B0, submitted by Stanislav | ||
66 | Voronyi. | ||
67 | |||
68 | Thu Jun 19 20:05:58 1997 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
69 | |||
70 | * serial.c (begin_break, end_break, rs_ioctl): Applied patch | ||
71 | to support BSD ioctls to set and clear the break | ||
72 | condition explicitly. | ||
73 | |||
74 | * console.c (scrup, scrdown, insert_line, delete_line): Applied | ||
75 | fix suggested by Aaron Tiensivu to speed up block scrolls | ||
76 | up and down. | ||
77 | |||
78 | * n_tty.c (opost_block, write_chan): Added a modified "fast | ||
79 | console" patch which processes a block of text via | ||
80 | "cooking" efficiently. | ||
81 | |||
82 | Wed Jun 18 15:25:50 1997 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
83 | |||
84 | * tty_io.c (init_dev, release_dev): Applied fix suggested by Bill | ||
85 | Hawes to prevent race conditions in the tty code. | ||
86 | |||
87 | * n_tty.c (n_tty_chars_in_buffer): Applied fix suggested by Bill | ||
88 | Hawes so that n_tty_chars_in_buffer returns the correct | ||
89 | value in the case when the tty is in cannonical mode. (To | ||
90 | avoid a pty deadlock with telnetd.) | ||
91 | |||
92 | Thu Feb 27 01:53:08 1997 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
93 | |||
94 | * serial.c (change_speed): Add support for the termios flag | ||
95 | CMSPAR, which allows the user to select stick parity. | ||
96 | (i.e, if PARODD is set, the parity bit is always 1; if | ||
97 | PARRODD is not set, then the parity bit is always 0). | ||
98 | |||
99 | Wed Feb 26 19:03:10 1997 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
100 | |||
101 | * serial.c (cleanup_module): Fix memory leak when using the serial | ||
102 | driver as a module; make sure tmp_buf gets freed! | ||
103 | |||
104 | Tue Feb 25 11:01:59 1997 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
105 | |||
106 | * serial.c (set_modem_info): Add support for setting and clearing | ||
107 | the OUT1 and OUT2 bits. (For special case UART's, usually | ||
108 | for half-duplex.) | ||
109 | (autoconfig, change_speed): Fix TI 16750 support. | ||
110 | |||
111 | Sun Feb 16 00:14:43 1997 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
112 | |||
113 | * tty_io.c (release_dev): Add sanity check to make sure there are | ||
114 | no waiters on tty->read_wait or tty->write_wait. | ||
115 | |||
116 | * serial.c (rs_init): Don't autoconfig a device if the I/O region | ||
117 | is already reserved. | ||
118 | |||
119 | * serial.c (serial_proc_info): Add support for /proc/serial. | ||
120 | |||
121 | Thu Feb 13 00:49:10 1997 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
122 | |||
123 | * serial.c (receive_chars): When the UART repotrs an overrun | ||
124 | condition, it does so with a valid character. Changed to | ||
125 | not throw away the valid character, but instead report the | ||
126 | overrun after the valid character. | ||
127 | |||
128 | * serial.c: Added new #ifdef's for some of the advanced serial | ||
129 | driver features. A minimal driver that only supports COM | ||
130 | 1/2/3/4 without sharing serial interrupts only takes 17k; | ||
131 | the full driver takes 32k. | ||
132 | |||
133 | Wed Feb 12 14:50:44 1997 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
134 | |||
135 | * vt.c: | ||
136 | * pty.c: | ||
137 | * tty_ioctl.c: | ||
138 | * serial.c: Update routines to use the new 2.1 memory access | ||
139 | routines. | ||
140 | |||
141 | Wed Dec 4 07:51:52 1996 Theodore Ts'o <tytso@localhost.mit.edu> | ||
142 | |||
143 | * serial.c (change_speed): Use save_flags(); cli() and | ||
144 | restore_flags() in order to ensure we don't accidentally | ||
145 | turn on interrupts when starting up the port. | ||
146 | (startup): Move the insertion of serial structure into the | ||
147 | IRQ chain earlier into the startup processing. Interrupts | ||
148 | should be off this whole time, but we eventually will want | ||
149 | to reduce this window. | ||
150 | |||
151 | Thu Nov 21 10:05:22 1996 Theodore Ts'o <tytso@localhost.mit.edu> | ||
152 | |||
153 | * tty_ioctl.c (tty_wait_until_sent): Always check the driver | ||
154 | wait_until_ready routine, even if there are no characters | ||
155 | in the xmit buffer. (There may be charactes in the device | ||
156 | FIFO.) | ||
157 | (n_tty_ioctl): Add new flag tty->flow_stopped which | ||
158 | indicates whether the tty is stopped due to a request by | ||
159 | the TCXONC ioctl (used by tcflow). If so, don't let an | ||
160 | incoming XOFF character restart the tty. The tty can only | ||
161 | be restarted by another TCXONC request. | ||
162 | |||
163 | * tty_io.c (start_tty): Don't allow the tty to be restarted if | ||
164 | tty->flow_stopped is true. | ||
165 | |||
166 | * n_tty.c (n_tty_receive_char): If tty->flow_stopped is true, and | ||
167 | IXANY is set, don't eat a character trying to restart the | ||
168 | tty. | ||
169 | |||
170 | * serial.c (startup): Remove need for MCR_noint from the | ||
171 | async_struct structure. Only turn on DTR and RTS if the | ||
172 | baud rate is not zero. | ||
173 | (change_speed): More accurately calculate the timeout | ||
174 | value based on the word size. Move responsibility of | ||
175 | hangup when speed becomes B0 to rs_set_termios() | ||
176 | (set_serial_info): When changing the UART type set the | ||
177 | current xmit_fifo_size as well as the permanent | ||
178 | xmit_fifo_size. | ||
179 | (rs_ioctl): Fix TCSBRK (used by tcdrain) and TCSBRKP | ||
180 | ioctls to return EINTR if interrupted by a signal. | ||
181 | (rs_set_termios): If the baud rate changes to or from B0, | ||
182 | this function is now responsible for setting or clearing | ||
183 | DTR and RTS. DTR and RTS are only be changed on the | ||
184 | transition to or from the B0 state. | ||
185 | (rs_close): Wait for the characters to drain based on | ||
186 | info->timeout. At low baud rates (50 bps), it may take a | ||
187 | long time for the FIFO to completely drain out! | ||
188 | (rs_wait_until_sent): Fixed timeout handling. Now | ||
189 | releases control to the scheduler, but checks frequently | ||
190 | enough so that the function is sensitive enough to pass | ||
191 | the timing requirements of the NIST-PCTS. | ||
192 | (block_til_ready): When opening the device, don't turn on | ||
193 | DTR and RTS if the baud rate is B0. | ||
194 | |||
195 | Thu Nov 14 00:06:09 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
196 | |||
197 | * serial.c (autoconfig): Fix autoconfiguration problems; | ||
198 | info->flags wasn't getting initialized from the state | ||
199 | structure. Put in more paranoid test for the 16750. | ||
200 | |||
201 | Fri Nov 8 20:19:50 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
202 | |||
203 | * n_tty.c (n_tty_flush_buffer): Only call driver->unthrottle() if | ||
204 | the tty was previous throttled. | ||
205 | (n_tty_set_termios, write_chan): Add changes suggested by | ||
206 | Simon P. Allen to allow hardware cooking. | ||
207 | |||
208 | * tty_ioctl.c (set_termios): If we get a signal while waiting for | ||
209 | the tty to drain, return -EINTR. | ||
210 | |||
211 | * serial.c (change_speed): Add support for CREAD, as required by | ||
212 | POSIX. | ||
213 | |||
214 | Sat Nov 2 20:43:10 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
215 | |||
216 | * serial.c: Wholesale changes. Added support for the Startech | ||
217 | 16650 and 16650V2 chips. (WARNING: the new startech | ||
218 | 16650A may or may not work!) Added support for the | ||
219 | TI16750 (not yet tested). Split async_struct into a | ||
220 | transient part (async_struct) and a permanent part | ||
221 | (serial_state) which contains the configuration | ||
222 | information for the ports. Added new driver routines | ||
223 | wait_until_sent() and send_xchar() to help with POSIX | ||
224 | compliance. Added support for radio clocks which waggle | ||
225 | the carrier detect line (CONFIG_HARD_PPS). | ||
226 | |||
227 | * tty_ioctl.c (tty_wait_until_sent): Added call to new driver | ||
228 | function tty->driver.wait_until_sent(), which returns when | ||
229 | the tty's device xmit buffers are drained. Needed for | ||
230 | full POSIX compliance. | ||
231 | |||
232 | (send_prio_char): New function, called by the ioctl's | ||
233 | TCIOFF and TCION; uses the new driver call send_xchar(), | ||
234 | which will send the XON or XOFF character at high priority | ||
235 | (and even if tty output is stopped). | ||
236 | |||
237 | Wed Jun 5 18:52:04 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
238 | |||
239 | * pty.c (pty_close): When closing a pty, make sure packet mode is | ||
240 | cleared. | ||
241 | |||
242 | Sun May 26 09:33:52 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
243 | |||
244 | * vesa_blank.c (set_vesa_blanking): Add missing verify_area() call. | ||
245 | |||
246 | * selection.c (set_selection): Add missing verify_area() call. | ||
247 | |||
248 | * tty_io.c (tty_ioctl): Add missing verify_area() calls. | ||
249 | |||
250 | * serial.c (rs_ioctl): Add missing verify_area() calls. | ||
251 | (rs_init): Allow initialization of serial driver | ||
252 | configuration from a module. | ||
253 | |||
254 | * random.c (extract_entropy): Add missing verify_area call. | ||
255 | Don't limit number of characters returned to | ||
256 | 32,768. Extract entropy is now no longer a inlined | ||
257 | function. | ||
258 | |||
259 | (random_read): Check return value in case extract_entropy | ||
260 | returns an error. | ||
261 | |||
262 | (secure_tcp_sequence_number): New function which returns a | ||
263 | secure TCP sequence number. This is needed to prevent some | ||
264 | nasty TCP hijacking attacks. | ||
265 | |||
266 | (init_std_data): Initialize using gettimeofday() instead of | ||
267 | struct timeval xtime. | ||
268 | |||
269 | (fast_add_entropy_word, add_entropy_word): Rename the | ||
270 | inline function add_entropy_word() to | ||
271 | fast_add_entropy_word(). Make add_entropy_word() be the | ||
272 | non-inlined function which is used in non-timing critical | ||
273 | places, in order to save space. | ||
274 | |||
275 | (initialize_benchmark, begin_benchmark, end_benchmark): New | ||
276 | functions defined when RANDOM_BENCHMARK is defined. They | ||
277 | allow us to benchmark the speed of the | ||
278 | add_timer_randomness() call. | ||
279 | |||
280 | (int_ln, rotate_left): Add two new inline functions with | ||
281 | i386 optimized asm instructions. This speeds up the | ||
282 | critical add_entropy_word() and add_timer_randomness() | ||
283 | functions, which are called from interrupt handlers. | ||
284 | |||
285 | Tue May 7 22:51:11 1996 <tytso@rsts-11.mit.edu> | ||
286 | |||
287 | * random.c (add_timer_randomness): Limit the amount randomness | ||
288 | that we estimate to 12 bits. (An arbitrary amount). | ||
289 | |||
290 | (extract_entropy): To make it harder to analyze the hash | ||
291 | function, fold the hash function in half using XOR, and | ||
292 | use the folded result as the value to emit to the user. | ||
293 | Also, add timer randomness each pass through the | ||
294 | exact_entropy call, to increase the amount of unknown | ||
295 | values during the extraction process. | ||
296 | |||
297 | (random_ioctl): Use IOR/IOW definitions to define the | ||
298 | ioctl values used by the /dev/random driver. Allow the | ||
299 | old ioctl values to be used for backwards compatibility | ||
300 | (for a limited amount of time). | ||
301 | |||
302 | Wed Apr 24 14:02:04 1996 Theodore Ts'o <tytso@rsts-11.mit.edu> | ||
303 | |||
304 | * random.c (add_timer_randomness): Use 2nd derivative as well to | ||
305 | better estimate entropy. | ||
306 | |||
307 | (rand_initialize): Explicitly initialize all the pointers | ||
308 | to NULL. (Clearing pointers using memset isn't portable.) | ||
309 | Initialize the random pool with OS-dependent data. | ||
310 | |||
311 | (random_write): Add sanity checking to the arguments to | ||
312 | random_write(), so that bad arguments won't cause a kernel | ||
313 | SEGV. | ||
314 | |||
315 | (random_read): Update the access time of the device inode | ||
316 | when you return data to the user. | ||
317 | |||
318 | (random_ioctl): Wake up the random_wait channel when there | ||
319 | are only WAIT_INPUT_BITS available. Add more paranoia | ||
320 | checks to make sure entropy_count doesn't go beyond the | ||
321 | bounds of (0, POOLSIZE). Add a few missing verify_area | ||
322 | checks. Add support for the RNDCLEARPOOL ioctl, which | ||
323 | zaps the random pool. | ||
324 | |||
325 | (add_timer_randomness): Wake up the random_wait | ||
326 | channel only when there are WAIT_INPUT_BITS available. | ||
327 | |||
328 | (random_select): Allow a random refresh daemon process to | ||
329 | select on /dev/random for writing; wake up the daemon when | ||
330 | there are less than WAIT_OUTPUT_BITS bits of randomness | ||
331 | available. | ||
332 | |||
333 | Tue Apr 23 22:56:07 1996 <tytso@rsts-11.mit.edu> | ||
334 | |||
335 | * tty_io.c (init_dev): Change return code when user attempts to | ||
336 | open master pty which is already open from EAGAIN to EIO, | ||
337 | to match with BSD expectations. EIO is more correct | ||
338 | anyway, since EAGAIN implies that retrying will be | ||
339 | successful --- which it might be.... Eventually!! | ||
340 | |||
341 | * pty.c (pty_open, pty_close): Fix wait loop so that we don't | ||
342 | busy loop while waiting for the master side to open. | ||
343 | Fix tty opening/closing logic. TTY_SLAVE_CLOSED was | ||
344 | renamed to TTY_OTHER_CLOSED, so that the name is more | ||
345 | descriptive. Also fixed code so that the tty flag | ||
346 | actually works correctly now.... | ||
347 | |||
348 | Mon Apr 1 10:22:01 1996 <tytso@rsts-11.mit.edu> | ||
349 | |||
350 | * serial.c (rs_close): Cleaned up modularization changes. | ||
351 | Remove code which forced line discipline back to N_TTY | ||
352 | this is done in the tty upper layers, and there's no | ||
353 | reason to do it here. (Making this change also | ||
354 | removed the requirement that the serial module access | ||
355 | the internal kernel symbol "ldiscs".) | ||
356 | |||
357 | * tty_io.c (tty_init): Formally register a tty_driver entry for | ||
358 | /dev/tty (device 4, 0) and /dev/console (device 5, 0). | ||
359 | This guarantees that major device numbers 4 and 5 will be | ||
360 | reserved for the tty subsystem (as they have to be because | ||
361 | of /dev/tty and /dev/console). Removed tty_regdev, as | ||
362 | this interface is no longer necessary. | ||
363 | |||
364 | Sun Mar 17 20:42:47 GMT 1996 <ah@doc.ic.ac.uk> | ||
365 | |||
366 | * serial.c : modularisation (changes in linux/fs/device.c allow | ||
367 | kerneld to automatically load the serial module). | ||
368 | |||
369 | * Makefile, Config.in : serial modularisation adds. | ||
370 | |||
371 | * tty_io.c : tty_init_ctty used by to register "cua" driver just | ||
372 | for the /dev/tty device (5,0). Added tty_regdev. | ||
373 | |||
374 | * serial.c (shutdown, rs_ioctl) : when port shuts down wakeup processes | ||
375 | waiting on delta_msr_wait. The TIOCMIWAIT ioctl returns EIO | ||
376 | if no change was done since the time of call. | ||
377 | |||
378 | Sat Mar 16 14:33:13 1996 <aeb@cwi.nl> | ||
379 | |||
380 | * tty_io.c (disassociate_ctty): If disassociate_ctty is called by | ||
381 | exit, do not perform an implicit vhangup on a pty. | ||
382 | |||
383 | Fri Feb 9 14:15:47 1996 <tytso@rsts-11.mit.edu> | ||
384 | |||
385 | * serial.c (block_til_ready): Fixed another race condition which | ||
386 | happens if a hangup happens during the open. | ||
387 | |||
388 | Wed Jan 10 10:08:00 1996 <tytso@rsts-11.mit.edu> | ||
389 | |||
390 | * serial.c (block_til_ready): Remove race condition which happened | ||
391 | if a hangup condition happened during the setup of the | ||
392 | UART, before rs_open() called block_til_ready(). This | ||
393 | caused the info->count counter to be erroneously | ||
394 | decremented. | ||
395 | |||
396 | * serial.c (startup, rs_open): Remove race condition that could | ||
397 | cause a memory leak of one page. (Fortunately, both race | ||
398 | conditions were relatively rare in practice.) | ||
399 | |||
400 | Tue Dec 5 13:21:27 1995 <tytso@rsts-11.mit.edu> | ||
401 | |||
402 | * serial.c (check_modem_status, rs_ioctl): Support the new | ||
403 | ioctl()'s TIOCGICOUNT, TIOCMIWAIT. These allow an | ||
404 | application program to wait on a modem serial register | ||
405 | status bit change, and to find out how many changes have | ||
406 | taken place for the MSR bits. | ||
407 | |||
408 | (rs_write): Eliminate a race condition which is introduced | ||
409 | if it is necessary to wait for the semaphore. | ||
410 | |||
411 | Sat Nov 4 17:14:45 1995 <tytso@rsts-11.mit.edu> | ||
412 | |||
413 | * tty_io.c (tty_init): Move registration of TTY_MAJOR and | ||
414 | TTY_AUX_MAJOR to the end, so that /proc/devices looks | ||
415 | prettier. | ||
416 | |||
417 | * pty.c (pty_init): Use new major numbers for PTY master and slave | ||
418 | devices. This allow us to have more than 64 pty's. We | ||
419 | register the old pty devices for backwards compatibility. | ||
420 | Note that a system should either be using the old pty | ||
421 | devices or the new pty devices --- in general, it should | ||
422 | try to use both, since they map into the same pty table. | ||
423 | The old pty devices are strictly for backwards compatibility. | ||
424 | |||
425 | Wed Oct 11 12:45:24 1995 <tytso@rsts-11.mit.edu> | ||
426 | |||
427 | * tty_io.c (disassociate_ctty): If disassociate_ctty is called by | ||
428 | exit, perform an implicit vhangup on the tty. | ||
429 | |||
430 | * pty.c (pty_close): When the master pty is closed, send a hangup | ||
431 | to the slave pty. | ||
432 | (pty_open): Use the flag TTY_SLAVE_CLOSED to test to see | ||
433 | if there are any open slave ptys, instead of using | ||
434 | tty->link->count. The old method got confused if there | ||
435 | were processes that had hung-up file descriptors on the | ||
436 | slave tty. | ||
437 | |||
438 | Tue May 2 00:53:25 1995 <tytso@rsx-11.mit.edu> | ||
439 | |||
440 | * tty_io.c (tty_set_ldisc): Wait until the output buffer is | ||
441 | drained before closing the old line discipline --- needed | ||
442 | in only one case: XON/XOFF processing. | ||
443 | |||
444 | * n_tty.c (n_tty_close): Don't bother waiting until the output | ||
445 | driver is closed; in general, the line discipline | ||
446 | shouldn't care if the hardware is finished | ||
447 | transmitting before the line discipline terminates. | ||
448 | |||
449 | * tty_io.c (release_dev): Shutdown the line discipline after | ||
450 | decrementing the tty count variable; but set the | ||
451 | TTY_CLOSING flag so that we know that this tty structure | ||
452 | isn't long for this world. | ||
453 | |||
454 | * tty_io.c (init_dev): Add sanity code to check to see if | ||
455 | TTY_CLOSING is set on a tty structure; if so, something | ||
456 | bad has happened (probably a line discipline close blocked | ||
457 | when it shouldn't have; so do a kernel printk and then | ||
458 | return an error). | ||
459 | |||
460 | Wed Apr 26 10:23:44 1995 Theodore Y. Ts'o <tytso@localhost> | ||
461 | |||
462 | * tty_io.c (release_dev): Try to shutdown the line discipline | ||
463 | *before* decrementing the tty count variable; this removes | ||
464 | a potential race condition which occurs when the line | ||
465 | discipline close blocks, and another process then tries | ||
466 | open the same serial port. | ||
467 | |||
468 | * serial.c (rs_hangup): When hanging up, flush the output buffer | ||
469 | before shutting down the UART. Otherwise the line | ||
470 | discipline close blocks waiting for the characters to get | ||
471 | flushed, which never happens until the serial port gets reused. | ||
472 | |||
473 | Wed Apr 12 08:06:16 1995 Theodore Y. Ts'o <tytso@localhost> | ||
474 | |||
475 | * serial.c (do_serial_hangup, do_softint, check_modem_status, | ||
476 | rs_init): Hangups are now scheduled via a separate tqueue | ||
477 | structure in the async_struct structure, tqueue_hangup. | ||
478 | This task is pushed on to the tq_schedule queue, so that | ||
479 | it is processed synchronously by the scheduler. | ||
480 | |||
481 | Sat Feb 18 12:13:51 1995 Theodore Y. Ts'o (tytso@rt-11) | ||
482 | |||
483 | * tty_io.c (disassociate_ctty, tty_open, tty_ioctl): Clear | ||
484 | current->tty_old_pgrp field when a session leader | ||
485 | acquires a controlling tty, and after a session leader | ||
486 | has disassociated from a controlling tty. | ||
487 | |||
488 | Fri Feb 17 09:34:09 1995 Theodore Y. Ts'o (tytso@rt-11) | ||
489 | |||
490 | * serial.c (rs_interrupt_single, rs_interrupt, rs_interrupt_multi): | ||
491 | Change the number of passes made from 64 to be 256, | ||
492 | configurable with the #define RS_ISR_PASS_LIMIT. | ||
493 | |||
494 | * serial.c (rs_init, set_serial_info, get_serial_info, rs_close): | ||
495 | Remove support for closing_wait2. Instead, set | ||
496 | tty->closing and rely on the line discipline to prevent | ||
497 | echo wars. | ||
498 | |||
499 | * n_tty.c (n_tty_receive_char): IEXTEN does not need to be | ||
500 | enabled in order for IXANY to be active. | ||
501 | |||
502 | If tty->closing is set, then only process XON and XOFF | ||
503 | characters. | ||
504 | |||
505 | Sun Feb 12 23:57:48 1995 Theodore Y. Ts'o (tytso@rt-11) | ||
506 | |||
507 | * serial.c (rs_timer): Change the interrupt poll time from 60 | ||
508 | seconds to 10 seconds, configurable with the #define | ||
509 | RS_STROBE_TIME. | ||
510 | |||
511 | * serial.c (rs_interrupt_multi, startup, shutdown, rs_ioctl, | ||
512 | set_multiport_struct, get_multiport_struct): Add | ||
513 | provisions for a new type of interrupt service routine, | ||
514 | which better supports multiple serial ports on a single | ||
515 | IRQ. | ||
516 | |||
517 | Sun Feb 5 19:35:11 1995 Theodore Y. Ts'o (tytso@rt-11) | ||
518 | |||
519 | * tty_ioctl.c (n_tty_ioctl, set_termios, tty_wait_until_sent): | ||
520 | * serial.c (rs_ioctl, rs_close): | ||
521 | * cyclades.c (cy_ioctl, cy_close): | ||
522 | * n_tty.c (n_tty_close): Rename wait_until_sent to | ||
523 | tty_wait_until_sent, so that it's a better name to export | ||
524 | in ksyms.c. | ||
525 | |||
526 | Sat Feb 4 23:36:20 1995 Theodore Y. Ts'o (tytso@rt-11) | ||
527 | |||
528 | * serial.c (rs_close): Added missing check for closing_wait2 being | ||
529 | ASYNC_CLOSING_WAIT_NONE. | ||
530 | |||
531 | Thu Jan 26 09:02:49 1995 Theodore Y. Ts'o (tytso@rt-11) | ||
532 | |||
533 | * serial.c (rs_init, set_serial_info, get_serial_info, | ||
534 | rs_close): Support close_wait in the serial driver. | ||
535 | This is helpful for slow devices (like serial | ||
536 | plotters) so that their outputs don't get flushed upon | ||
537 | device close. This has to be configurable because | ||
538 | normally we don't want ports to be hung up for long | ||
539 | periods of time during a close when they are not | ||
540 | connected to a device, or the device is powered off. | ||
541 | |||
542 | The default is to wait 30 seconds; in the case of a | ||
543 | very slow device, the close_wait timeout should be | ||
544 | lengthened. If it is set to 0, the kernel will wait | ||
545 | forever for all of the data to be transmitted. | ||
546 | |||
547 | Thu Jan 17 01:17:20 1995 Theodore Y. Ts'o (tytso@rt-11) | ||
548 | |||
549 | * serial.c (startup, change_speed, rs_init): Add support to detect | ||
550 | the StarTech 16650 chip. Treat it as a 16450 for now, | ||
551 | because of its FIFO bugs. | ||
552 | |||
553 | Thu Jan 5 21:21:57 1995 <dahinds@users.sourceforge.net> | ||
554 | |||
555 | * serial.c: (receive_char): Added counter to prevent infinite loop | ||
556 | when a PCMCIA serial device is ejected. | ||
557 | |||
558 | Thu Dec 29 17:53:48 1994 <tytso@rsx-11.mit.edu> | ||
559 | |||
560 | * tty_io.c (check_tty_count): New procedure which checks | ||
561 | tty->count to make sure that it matches with the number of | ||
562 | open file descriptors which point at the structure. If | ||
563 | the number doesn't match, it prints a warning message. | ||
564 | |||
565 | Wed Dec 28 15:41:51 1994 <tytso@rsx-11.mit.edu> | ||
566 | |||
567 | * tty_io.c (do_tty_hangup, disassociate_ctty): At hangup time, | ||
568 | save the tty's current foreground process group in the | ||
569 | session leader's task structure. When the session leader | ||
570 | terminates, send a SIGHUP, SIGCONT to that process group. | ||
571 | This is not required by POSIX, but it's not prohibited | ||
572 | either, and it appears to be the least intrusive way | ||
573 | to fix a problem that dialup servers have with | ||
574 | orphaned process groups caused by modem hangups. | ||
575 | |||
576 | Thu Dec 8 14:52:11 1994 <tytso@rsx-11.mit.edu> | ||
577 | |||
578 | * serial.c (rs_ioctl): Don't allow most ioctl's if the serial port | ||
579 | isn't initialized. | ||
580 | |||
581 | * serial.c (rs_close): Don't clear the IER if the serial port | ||
582 | isn't initialized. | ||
583 | |||
584 | * serial.c (block_til_ready): Don't try to block on the dialin | ||
585 | port if the serial port isn't initialized. | ||
586 | |||
587 | Wed Dec 7 10:48:30 1994 Si Park (si@wimpol.demon.co.uk) | ||
588 | * tty_io.c (tty_register_driver): Fix bug when linking onto | ||
589 | the tty_drivers list. We now test that there are elements | ||
590 | already on the list before setting the back link from the | ||
591 | first element to the new driver. | ||
592 | |||
593 | * tty_io.c (tty_unregister_driver): Fix bug in unlinking the | ||
594 | specified driver from the tty_drivers list. We were not | ||
595 | setting the back link correctly. This used to result in | ||
596 | a dangling back link pointer and cause panics on the next | ||
597 | call to get_tty_driver(). | ||
598 | |||
599 | Tue Nov 29 10:21:09 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
600 | |||
601 | * tty_io.c (tty_unregister_driver): Fix bug in | ||
602 | tty_unregister_driver where the pointer to the refcount is | ||
603 | tested, instead of the refcount itself. This caused | ||
604 | tty_unregister_driver to always return EBUSY. | ||
605 | |||
606 | Sat Nov 26 11:59:24 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
607 | |||
608 | * tty_io.c (tty_ioctl): Add support for the new ioctl | ||
609 | TIOCTTYGSTRUCT, which allow a kernel debugging program | ||
610 | direct read access to the tty and tty_driver structures. | ||
611 | |||
612 | Fri Nov 25 17:26:22 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
613 | |||
614 | * serial.c (rs_set_termios): Don't wake up processes blocked in | ||
615 | open when the CLOCAL flag changes, since a blocking | ||
616 | open only samples the CLOCAL flag once when it blocks, | ||
617 | and doesn't check it again. (n.b. FreeBSD has a | ||
618 | different behavior for blocking opens; it's not clear | ||
619 | whether Linux or FreeBSD's interpretation is correct. | ||
620 | POSIX doesn't give clear guidance on this issue, so | ||
621 | this may change in the future....) | ||
622 | |||
623 | * serial.c (block_til_ready): Use the correct termios structure to | ||
624 | check the CLOCAL flag. If the cuaXX device is active, | ||
625 | then check the saved termios for the ttySXX device. | ||
626 | Otherwise, use the currently active termios structure. | ||
627 | |||
628 | Sun Nov 6 21:05:44 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
629 | |||
630 | * serial.c (change_speed): Add support for direct access of | ||
631 | 57,600 and 115,200 bps. | ||
632 | |||
633 | Wed Nov 2 10:32:36 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
634 | |||
635 | * n_tty.c (n_tty_receive_room): Only allow excess characters | ||
636 | through if we are in ICANON mode *and* there are other no | ||
637 | pending lines in the buffer. Otherwise cut and paste over | ||
638 | 4k breaks. | ||
639 | |||
640 | Sat Oct 29 18:17:34 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
641 | |||
642 | * serial.c (rs_ioctl, get_lsr_info): Added patch suggested by Arne | ||
643 | Riiber so that user mode programs can tell when the | ||
644 | transmitter shift register is empty. | ||
645 | |||
646 | Thu Oct 27 23:14:29 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
647 | |||
648 | * tty_ioctl.c (wait_until_sent): Added debugging printk statements | ||
649 | (under the #ifdef TTY_DEBUG_WAIT_UNTIL_SENT) | ||
650 | |||
651 | * serial.c (rs_interrupt, rs_interrupt_single, receive_chars, | ||
652 | change_speed, rs_close): rs_close now disables receiver | ||
653 | interrupts when closing the serial port. This allows the | ||
654 | serial port to close quickly when Linux and a modem (or a | ||
655 | mouse) are engaged in an echo war; when closing the serial | ||
656 | port, we now first stop listening to incoming characters, | ||
657 | and *then* wait for the transmit buffer to drain. | ||
658 | |||
659 | In order to make this change, the info->read_status_mask | ||
660 | is now used to control what bits of the line status | ||
661 | register are looked at in the interrupt routine in all | ||
662 | cases; previously it was only used in receive_chars to | ||
663 | select a few of the status bits. | ||
664 | |||
665 | Mon Oct 24 23:36:21 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
666 | |||
667 | * serial.c (rs_close): Add a timeout to the transmitter flush | ||
668 | loop; this is just a sanity check in case we have flaky | ||
669 | (or non-existent-but-configured-by-the-user) hardware. | ||
670 | |||
671 | Fri Oct 21 09:37:23 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
672 | |||
673 | * tty_io.c (tty_fasync): When asynchronous I/O is enabled, if the | ||
674 | process or process group has not be specified yet, set it | ||
675 | to be the tty's process group, or if that is not yet set, | ||
676 | to the current process's pid. | ||
677 | |||
678 | Thu Oct 20 23:17:28 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
679 | |||
680 | * n_tty.c (n_tty_receive_room): If we are doing input | ||
681 | canonicalization, let as many characters through as | ||
682 | possible, so that the excess characters can be "beeped". | ||
683 | |||
684 | Tue Oct 18 10:02:43 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
685 | |||
686 | * serial.c (rs_start): Removed an incorrect '!' that was | ||
687 | preventing transmit interrupts from being re-enabled in | ||
688 | rs_start(). Fortunately in most cases it would be | ||
689 | re-enabled elsewhere, but this still should be fixed | ||
690 | correctly. | ||
691 | |||
692 | Sun Oct 9 23:46:03 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
693 | |||
694 | * tty_io.c (do_tty_hangup): If the tty driver flags | ||
695 | TTY_DRIVER_RESET_TERMIOS is set, then reset the termios | ||
696 | settings back to the driver's initial configuration. This | ||
697 | allows the termios settings to be reset even if a process | ||
698 | has hung up file descriptors keeping a pty's termios from | ||
699 | being freed and reset. | ||
700 | |||
701 | * tty_io.c (release_dev): Fix memory leak. The pty's other | ||
702 | termios structure should also be freed. | ||
703 | |||
704 | * serial.c (rs_close, shutdown): Change how we wait for the | ||
705 | transmitter to completely drain before shutting down the | ||
706 | serial port. We now do it by scheduling in another | ||
707 | process instead of busy looping with the interrupts turned | ||
708 | on. This may eliminate some race condition problems that | ||
709 | some people seem to be reporting. | ||
710 | |||
711 | Sun Sep 25 14:18:14 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
712 | |||
713 | * tty_io.c (release_dev): When freeing a tty make sure that both | ||
714 | the tty and the o_tty (if present) aren't a process's | ||
715 | controlling tty. (Previously, we only checked the tty.) | ||
716 | |||
717 | * serial.c (change_speed): Only enable the Modem Status | ||
718 | Interrupt for a port if CLOCAL is not set or CRTSCTS | ||
719 | is set. If we're not checking the carrier detect and | ||
720 | CTS line, there's no point in enabling the modem | ||
721 | status interrupt. This will save spurious interrupts | ||
722 | from slowing down systems who have terminals that | ||
723 | don't support either line. (Of course, if you want | ||
724 | only one of CD and CTS support, you will need a | ||
725 | properly wired serial cable.) | ||
726 | |||
727 | Thu Sep 22 08:32:48 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
728 | |||
729 | * tty_io.c (do_SAK): Return if tty is null. | ||
730 | |||
731 | * tty_io.c (_tty_name): Return "NULL tty" if the passed in tty is | ||
732 | NULL. | ||
733 | |||
734 | Sat Sep 17 13:19:25 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
735 | |||
736 | * tty_ioctl.c (n_tty_ioctl): Fix TIOCGLCKTRMIOS and | ||
737 | TIOCSLCKTRMIOS, which were totally broken. Remove | ||
738 | extra indirection from argument; it should be a struct | ||
739 | termios *, not a struct termios **. | ||
740 | &real_tty->termios_locked should have been | ||
741 | real_tty->termios_locked. This caused us to be | ||
742 | reading and writing the termios_locked structure to | ||
743 | random places in kernel memory. | ||
744 | |||
745 | * tty_io.c (release_dev): Oops! Forgot to delete a critical kfree | ||
746 | of the locked_termios. This leaves the locked_termios | ||
747 | structure pointed at a freed object. | ||
748 | |||
749 | Fri Sep 16 08:13:25 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
750 | |||
751 | * tty_io.c (tty_open): Don't check for an exclusive open until | ||
752 | after the device specific open routine has been called. | ||
753 | Otherwise, the serial device ref counting will be screwed | ||
754 | up. | ||
755 | |||
756 | * serial.c (rs_open, block_til_ready): Don't set termios structure | ||
757 | until after block_til_ready has returned successfully. | ||
758 | Modify block_til_ready to check the normal_termios | ||
759 | structure directly, so it doesn't rely on termios being | ||
760 | set before it's called. | ||
761 | |||
762 | Thu Sep 15 23:34:01 1994 Theodore Y. Ts'o (tytso@rt-11) | ||
763 | |||
764 | * serial.c (rs_close): Turn off interrupts during rs_close() to | ||
765 | prevent a race condition with the hangup code (which | ||
766 | runs during a software interrupt). | ||
767 | |||
768 | * tty_io.c (release_dev): Don't free the locked_termios structure; | ||
769 | its state must be retained across device opens. | ||
770 | |||
771 | |||
772 | * tty_io.c (tty_unregister_driver): Added function to unregister a | ||
773 | tty driver. (For loadable device drivers.) | ||
774 | |||
775 | |||