diff options
| author | Huang Shijie <shijie8@gmail.com> | 2012-08-22 22:13:36 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-09-05 13:28:35 -0700 |
| commit | f21ec3d2d46e5f2ffc06f31fe2704fdcea7a58f3 (patch) | |
| tree | 5d814cd687776374f960d3af2490187c3fbdf750 /include | |
| parent | e5b57c037a656c694c7f3674f96352297a6ee7d8 (diff) | |
| download | linux-f21ec3d2d46e5f2ffc06f31fe2704fdcea7a58f3.tar.bz2 | |
serial: add a new helper function
In most of the time, the driver needs to check if the cts flow control
is enabled. But now, the driver checks the ASYNC_CTS_FLOW flag manually,
which is not a grace way. So add a new wraper function to make the code
tidy and clean.
Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/tty.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index dbebd1e56bc1..9892121354cd 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -514,6 +514,12 @@ static inline struct tty_port *tty_port_get(struct tty_port *port) return port; } +/* If the cts flow control is enabled, return true. */ +static inline bool tty_port_cts_enabled(struct tty_port *port) +{ + return port->flags & ASYNC_CTS_FLOW; +} + extern struct tty_struct *tty_port_tty_get(struct tty_port *port); extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty); extern int tty_port_carrier_raised(struct tty_port *port); |