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authorAlan Cox <alan@redhat.com>2008-07-22 11:18:03 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-22 13:03:28 -0700
commit9e98966c7bb94355689478bc84cc3e0c190f977e (patch)
tree928aebbfee524a48aa94a3d3def5249c8846a79a /drivers/usb
parentabbe629ae4011d2020047f41bea9f9e4b0ec4361 (diff)
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')
-rw-r--r--drivers/usb/class/cdc-acm.c9
-rw-r--r--drivers/usb/serial/usb-serial.c3
2 files changed, 8 insertions, 4 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)
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 51917b0f079..8c2d531eede 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -395,7 +395,7 @@ static void serial_set_termios(struct tty_struct *tty, struct ktermios *old)
tty_termios_copy_hw(tty->termios, old);
}
-static void serial_break(struct tty_struct *tty, int break_state)
+static int serial_break(struct tty_struct *tty, int break_state)
{
struct usb_serial_port *port = tty->driver_data;
@@ -409,6 +409,7 @@ static void serial_break(struct tty_struct *tty, int break_state)
port->serial->type->break_ctl(tty, break_state);
unlock_kernel();
}
+ return 0;
}
static int serial_read_proc(char *page, char **start, off_t off, int count,