diff options
| author |   Peter Hurley <peter@hurleysoftware.com> | 2013-12-02 14:24:41 -0500 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-08 16:51:07 -0800 |
| commit | 5c32d12378313e0096ea0d450462aa638a90fb6e (patch) | |
| tree | 76d06fd377205cc71feccde450157560e2f26697 /drivers/tty/n_tty.c | |
| parent | serial: pl011: remove redundant early amba_ports declaration (diff) | |
| download | linux-dev-5c32d12378313e0096ea0d450462aa638a90fb6e.tar.xz linux-dev-5c32d12378313e0096ea0d450462aa638a90fb6e.zip | |
n_tty: Merge .receive_buf() flavors
N_TTY's direct and flow-controlled flavors of the .receive_buf()
method are nearly identical; fold together.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/n_tty.c')
| -rw-r--r-- | drivers/tty/n_tty.c | 43 |
1 files changed, 16 insertions, 27 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 0f74945af624..cf22bef62c98 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -1674,32 +1674,9 @@ static void __receive_buf(struct tty_struct *tty, const unsigned char *cp, } } -static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, - char *fp, int count) -{ - int room, n; - - down_read(&tty->termios_rwsem); - - while (1) { - room = receive_room(tty); - n = min(count, room); - if (!n) - break; - __receive_buf(tty, cp, fp, n); - cp += n; - if (fp) - fp += n; - count -= n; - } - - tty->receive_room = room; - n_tty_check_throttle(tty); - up_read(&tty->termios_rwsem); -} - -static int n_tty_receive_buf2(struct tty_struct *tty, const unsigned char *cp, - char *fp, int count) +static int +n_tty_receive_buf_common(struct tty_struct *tty, const unsigned char *cp, + char *fp, int count, int flow) { struct n_tty_data *ldata = tty->disc_data; int room, n, rcvd = 0; @@ -1710,7 +1687,7 @@ static int n_tty_receive_buf2(struct tty_struct *tty, const unsigned char *cp, room = receive_room(tty); n = min(count, room); if (!n) { - if (!room) + if (flow && !room) ldata->no_room = 1; break; } @@ -1729,6 +1706,18 @@ static int n_tty_receive_buf2(struct tty_struct *tty, const unsigned char *cp, return rcvd; } +static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, + char *fp, int count) +{ + n_tty_receive_buf_common(tty, cp, fp, count, 0); +} + +static int n_tty_receive_buf2(struct tty_struct *tty, const unsigned char *cp, + char *fp, int count) +{ + return n_tty_receive_buf_common(tty, cp, fp, count, 1); +} + int is_ignored(int sig) { return (sigismember(¤t->blocked, sig) || |