The patch titled
tty: bring the old cris driver back somewhere into the realm of new tty buffering
has been removed from the -mm tree. Its filename was
tty-bring-the-old-cris-driver-back-somewhere-into-the.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: tty: bring the old cris driver back somewhere into the realm of new tty buffering
From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Alan Cox <alan@xxxxxxxxxx>
Cc: Mikael Starvik <starvik@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/serial/crisv10.c | 67 ++++++-------------------------------
1 file changed, 12 insertions(+), 55 deletions(-)
diff -puN drivers/serial/crisv10.c~tty-bring-the-old-cris-driver-back-somewhere-into-the drivers/serial/crisv10.c
--- a/drivers/serial/crisv10.c~tty-bring-the-old-cris-driver-back-somewhere-into-the
+++ a/drivers/serial/crisv10.c
@@ -514,6 +514,8 @@ struct tty_driver *serial_driver;
* TTY_THRESHOLD_THROTTLE/UNTHROTTLE=128
* BUF_SIZE can't be > 128
*/
+#define CRIS_BUF_SIZE 512
+
/* Currently 16 descriptors x 128 bytes = 2048 bytes */
#define SERIAL_DESCR_BUF_SIZE 256
@@ -2497,55 +2499,18 @@ static void flush_to_flip_buffer(struct
return;
}
- length = tty->flip.count;
- /* Don't flip more than the ldisc has room for.
- * The return value from ldisc.receive_room(tty) - might not be up to
- * date, the previous flip of up to TTY_FLIPBUF_SIZE might be on the
- * processed and not accounted for yet.
- * Since we use DMA, 1 SERIAL_DESCR_BUF_SIZE could be on the way.
- * Lets buffer data here and let flow control take care of it.
- * Since we normally flip large chunks, the ldisc don't react
- * with throttle until too late if we flip to much.
- */
- max_flip_size = tty->ldisc.receive_room(tty);
- if (max_flip_size < 0)
- max_flip_size = 0;
- if (max_flip_size <= (TTY_FLIPBUF_SIZE + /* Maybe not accounted for */
- length + info->recv_cnt + /* We have this queued */
- 2*SERIAL_DESCR_BUF_SIZE + /* This could be on the way */
- TTY_THRESHOLD_THROTTLE)) { /* Some slack */
- /* check TTY_THROTTLED first so it indicates our state */
- if (!test_and_set_bit(TTY_THROTTLED, &tty->flags)) {
- DFLOW(DEBUG_LOG(info->line,"flush_to_flip throttles room %lu\n", max_flip_size));
- rs_throttle(tty);
- }
-#if 0
- else if (max_flip_size <= (TTY_FLIPBUF_SIZE + /* Maybe not accounted for */
- length + info->recv_cnt + /* We have this queued */
- SERIAL_DESCR_BUF_SIZE + /* This could be on the way */
- TTY_THRESHOLD_THROTTLE)) { /* Some slack */
- DFLOW(DEBUG_LOG(info->line,"flush_to_flip throttles again! %lu\n", max_flip_size));
- rs_throttle(tty);
- }
-#endif
- }
-
- if (max_flip_size > TTY_FLIPBUF_SIZE)
- max_flip_size = TTY_FLIPBUF_SIZE;
-
- while ((buffer = info->first_recv_buffer) && length < max_flip_size) {
+ while ((buffer = info->first_recv_buffer) != NULL) {
unsigned int count = buffer->length;
- if (length + count > max_flip_size)
- count = max_flip_size - length;
+ count = tty_buffer_request_room(tty, count);
+ if (count == 0) /* Throttle ?? */
+ break;
- memcpy(tty->flip.char_buf_ptr + length, buffer->buffer, count);
- memset(tty->flip.flag_buf_ptr + length, TTY_NORMAL, count);
- tty->flip.flag_buf_ptr[length] = buffer->error;
+ if (count > 1)
+ tty_insert_flip_strings(tty, buffer->buffer, count - 1);
+ tty_insert_flip_char(tty, buffer->buffer[count-1], buffer->error);
- length += count;
info->recv_cnt -= count;
- DFLIP(DEBUG_LOG(info->line,"flip: %i\n", length));
if (count == buffer->length) {
info->first_recv_buffer = buffer->next;
@@ -2560,14 +2525,6 @@ static void flush_to_flip_buffer(struct
if (!info->first_recv_buffer)
info->last_recv_buffer = NULL;
- tty->flip.count = length;
- DFLIP(if (tty->ldisc.chars_in_buffer(tty) > 3500) {
- DEBUG_LOG(info->line, "ldisc %lu\n",
- tty->ldisc.chars_in_buffer(tty));
- DEBUG_LOG(info->line, "flip.count %lu\n",
- tty->flip.count);
- }
- );
restore_flags(flags);
DFLIP(
@@ -2722,17 +2679,17 @@ struct e100_serial * handle_ser_rx_inter
printk("!NO TTY!\n");
return info;
}
- if (tty->flip.count >= TTY_FLIPBUF_SIZE - TTY_THRESHOLD_THROTTLE) {
+ if (tty->flip.count >= CRIS_BUF_SIZE - TTY_THRESHOLD_THROTTLE) {
/* check TTY_THROTTLED first so it indicates our state */
if (!test_and_set_bit(TTY_THROTTLED, &tty->flags)) {
DFLOW(DEBUG_LOG(info->line, "rs_throttle flip.count: %i\n", tty->flip.count));
rs_throttle(tty);
}
}
- if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
+ if (tty->flip.count >= CRIS_BUF_SIZE) {
DEBUG_LOG(info->line, "force FLIP! %i\n", tty->flip.count);
tty->flip.work.func((void *) tty);
- if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
+ if (tty->flip.count >= CRIS_BUF_SIZE) {
DEBUG_LOG(info->line, "FLIP FULL! %i\n", tty->flip.count);
return info; /* if TTY_DONT_FLIP is set */
}
_
Patches currently in -mm which might be from alan@xxxxxxxxxxxxxxxxxxx are
origin.patch
git-libata-all.patch
serial-keep-the-dtr-setting-for-serial-console.patch
initio-fix-conflict-when-loading-driver.patch
security-convert-lsm-into-a-static-interface-vs-fix-null-pointer-dereference-in-__vm_enough_memory.patch
mxser-remove-use-of-dead-tty_flipbuf_size-definition.patch
jsm-remove-further-unneeded-crud.patch
ttyh-remove-dead-define.patch
codingstyle-relax-the-80-cole-rule.patch
add-config_vt_unicode.patch
keys-missing-word-in-documentation.patch
ide-cd-is-unmaintained.patch
tty-expose-new-methods-needed-for-drivers-to-get-termios.patch
tty-expose-new-methods-needed-for-drivers-to-get-termios-fix.patch
fs-correct-sus-compliance-for-open-of-large-file-without.patch
sysctl-remove-broken-cdrom-binary-sysctls.patch
mxser-remove-commented-crap.patch
char-cyclades-remove-bottom-half-processing.patch
usb_serial-stop-passing-null-to-functions-that-expect-data.patch
ark3116-update-termios-handling.patch
usb-serial-kill-another-case-we-pass-null-and-shouldnt.patch
ch341-fix-termios-handling.patch
digi_acceleport-fix-termios-and-also-readability-a-bit.patch
empeg-clean-up-and-handle-speeds.patch
ir_usb-termios-handling.patch
keyspan-termios-tidy.patch
kobil_sct-termios-encoding-fixups.patch
option-termios-handling.patch
sierra-termios.patch
usb-serial-handle-null-termios-methods-as-no-hardware-changing-support.patch
whiteheat-clean-up-cant-happen-checks-and-encode-baud.patch
cp2101-convert-to-new-termios.patch
ftd_sio-clean-ups-and-updates-for-new-termios-work.patch
ftd_sio-clean-ups-and-updates-for-new-termios-work-checkpatch-fixes.patch
io_edgeport-cleanups-and-tty-speed-reporting.patch
tty-kill-tty_flipbuf_size.patch
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