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| author | Peter Hurley <peter@hurleysoftware.com> | 2016-04-09 17:53:21 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-30 09:26:55 -0700 |
| commit | 5604a98e2f95d6221852960a3363588f40d78e22 (patch) | |
| tree | d9573557cf616e8751fbde45ee56d8280e3eebcf /include/linux/tty.h | |
| parent | e4d38f334ad24f80229a8ebab26950de8e8f34d7 (diff) | |
| download | linux-5604a98e2f95d6221852960a3363588f40d78e22.tar.gz linux-5604a98e2f95d6221852960a3363588f40d78e22.tar.bz2 linux-5604a98e2f95d6221852960a3363588f40d78e22.zip | |
tty: Replace ASYNC_CTS_FLOW bit and update atomically
Replace ASYNC_CTS_FLOW bit in the tty_port::flags field with
TTY_PORT_CTS_FLOW bit in the tty_port::iflags field. Add
tty_port_set_cts_flow() helper to abstract the atomic bit ops.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/tty.h')
| -rw-r--r-- | include/linux/tty.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index 4e0dbda05180..989d755b0ae4 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -255,7 +255,6 @@ struct tty_port { #define TTY_PORT_CTS_FLOW 3 /* h/w flow control enabled */ #define TTY_PORT_CHECK_CD 4 /* carrier detect enabled */ - /* * Where all of the state associated with a tty is kept while the tty * is open. Since the termios state should be kept even if the tty @@ -561,9 +560,18 @@ static inline struct tty_port *tty_port_get(struct tty_port *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; + return test_bit(TTY_PORT_CTS_FLOW, &port->iflags); } +static inline void tty_port_set_cts_flow(struct tty_port *port, bool val) +{ + if (val) + set_bit(TTY_PORT_CTS_FLOW, &port->iflags); + else + clear_bit(TTY_PORT_CTS_FLOW, &port->iflags); +} + + 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); |