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authorPeter Hurley <peter@hurleysoftware.com>2013-06-15 10:21:24 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-07-23 17:10:17 -0700
commitd2f8d7abd1e7ac04a0b42df36b53fef00d5d73aa (patch)
tree5d1bcd616e7ff4d630e270e5e77f547e4315e0ec /drivers/tty/n_tty.c
parentb0ac50be1f398ae1daedcf1ce71ac6b6409c88d2 (diff)
n_tty: Factor flagged char handling into separate fn
Prepare for modal receive_buf() handling; factor handling for TTY_BREAK, TTY_PARITY, TTY_FRAME and TTY_OVERRUN into n_tty_receive_char_flagged(). 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.c50
1 files changed, 29 insertions, 21 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 68fc4c34797..6aa90332dd3 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1468,6 +1468,29 @@ handle_newline:
put_tty_queue(c, ldata);
}
+static void
+n_tty_receive_char_flagged(struct tty_struct *tty, unsigned char c, char flag)
+{
+ char buf[64];
+
+ switch (flag) {
+ case TTY_BREAK:
+ n_tty_receive_break(tty);
+ break;
+ case TTY_PARITY:
+ case TTY_FRAME:
+ n_tty_receive_parity_error(tty, c);
+ break;
+ case TTY_OVERRUN:
+ n_tty_receive_overrun(tty);
+ break;
+ default:
+ printk(KERN_ERR "%s: unknown flag %d\n",
+ tty_name(tty, buf), flag);
+ break;
+ }
+}
+
/**
* n_tty_receive_buf - data receive
* @tty: terminal device
@@ -1511,34 +1534,19 @@ static void __receive_buf(struct tty_struct *tty, const unsigned char *cp,
char *fp, int count)
{
struct n_tty_data *ldata = tty->disc_data;
- char flags = TTY_NORMAL;
- char buf[64];
if (ldata->real_raw)
n_tty_receive_buf_real_raw(tty, cp, fp, count);
else {
+ char flag = TTY_NORMAL;
+
while (count--) {
if (fp)
- flags = *fp++;
- switch (flags) {
- case TTY_NORMAL:
+ flag = *fp++;
+ if (likely(flag == TTY_NORMAL))
n_tty_receive_char(tty, *cp++);
- break;
- case TTY_BREAK:
- n_tty_receive_break(tty);
- break;
- case TTY_PARITY:
- case TTY_FRAME:
- n_tty_receive_parity_error(tty, *cp++);
- break;
- case TTY_OVERRUN:
- n_tty_receive_overrun(tty);
- break;
- default:
- printk(KERN_ERR "%s: unknown flag %d\n",
- tty_name(tty, buf), flags);
- break;
- }
+ else
+ n_tty_receive_char_flagged(tty, *cp++, flag);
}
flush_echoes(tty);