diff options
| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2008-01-08 17:55:51 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-01-09 03:16:34 +0300 |
| commit | bf5e5834bffc62b50cd4a201804506eb11ef1af8 (patch) | |
| tree | 09cd94995a4c67b0fd84f7c81b7f2bb58fac8e50 /include | |
| parent | cf0594625083111ae522496dc1c256f7476939c2 (diff) | |
| download | linux-bf5e5834bffc62b50cd4a201804506eb11ef1af8.tar.xz | |
pl2303: Fix mode switching regression
Cleaning out all the incorrect 'no change made' checks for termios
settings showed up a problem with the PL2303. The hardware here seems to
lose sync and bits if you tell it to make no changes. This shows up with
a real world application.
To fix this the driver check for meaningful hardware changes is restored
but doing the tests correctly and as a tty layer function so it doesn't
get duplicated wrongly everywhere if other drivers turn out to need it.
Signed-off-by: Alan Cox <alan@redhat.com>
Tested-by: Mirko Parthey <mirko.parthey@informatik.tu-chemnitz.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/tty.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index c555f5442bd7..defd2ab72449 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -319,6 +319,7 @@ extern speed_t tty_termios_input_baud_rate(struct ktermios *termios); extern void tty_termios_encode_baud_rate(struct ktermios *termios, speed_t ibaud, speed_t obaud); extern void tty_encode_baud_rate(struct tty_struct *tty, speed_t ibaud, speed_t obaud); extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old); +extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b); extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *); extern void tty_ldisc_deref(struct tty_ldisc *); |