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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2008-01-08 14:55:51 +0000
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-01-08 16:16:34 -0800
commitbf5e5834bffc62b50cd4a201804506eb11ef1af8 (patch)
tree09cd94995a4c67b0fd84f7c81b7f2bb58fac8e50 /include
parentcf0594625083111ae522496dc1c256f7476939c2 (diff)
downloadop-kernel-dev-bf5e5834bffc62b50cd4a201804506eb11ef1af8.zip
op-kernel-dev-bf5e5834bffc62b50cd4a201804506eb11ef1af8.tar.gz
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.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h
index c555f54..defd2ab 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 *);
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