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| author | Alan Cox <alan@redhat.com> | 2008-07-22 11:18:03 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-22 13:03:28 -0700 |
| commit | 9e98966c7bb94355689478bc84cc3e0c190f977e (patch) | |
| tree | 928aebbfee524a48aa94a3d3def5249c8846a79a /drivers/usb/class | |
| parent | abbe629ae4011d2020047f41bea9f9e4b0ec4361 (diff) | |
| download | linux-3.10-9e98966c7bb94355689478bc84cc3e0c190f977e.tar.gz linux-3.10-9e98966c7bb94355689478bc84cc3e0c190f977e.tar.bz2 linux-3.10-9e98966c7bb94355689478bc84cc3e0c190f977e.zip | |
tty: rework break handling
Some hardware needs to do break handling itself and may have partial
support only. Make break_ctl return an error code. Add a tty driver flag
so you can indicate driver hardware side break support.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/usb/class')
| -rw-r--r-- | drivers/usb/class/cdc-acm.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 95ae6377d7e..0725b1871f2 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -732,13 +732,16 @@ static void acm_tty_unthrottle(struct tty_struct *tty) tasklet_schedule(&acm->urb_task); } -static void acm_tty_break_ctl(struct tty_struct *tty, int state) +static int acm_tty_break_ctl(struct tty_struct *tty, int state) { struct acm *acm = tty->driver_data; + int retval; if (!ACM_READY(acm)) - return; - if (acm_send_break(acm, state ? 0xffff : 0)) + return -EINVAL; + retval = acm_send_break(acm, state ? 0xffff : 0); + if (retval < 0) dbg("send break failed"); + return retval; } static int acm_tty_tiocmget(struct tty_struct *tty, struct file *file) |