diff options
| author |   Peter Hurley <peter@hurleysoftware.com> | 2013-12-02 13:56:03 -0500 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-08 16:56:05 -0800 |
| commit | 82f91fe092b6eacd82e976b8955443f9fd97d07e (patch) | |
| tree | 42b967f676e8054a222e58521024babe250b88c9 /include/linux/tty_ldisc.h | |
| parent | n_tty: Only perform wakeups for waiters (diff) | |
| download | linux-dev-82f91fe092b6eacd82e976b8955443f9fd97d07e.tar.xz linux-dev-82f91fe092b6eacd82e976b8955443f9fd97d07e.zip | |
tty: Always handle NULL flag ptr
Most line disciplines already handle the undocumented NULL flag
ptr in their .receive_buf method; however, several don't.
Document the NULL flag ptr, and correct handling in the
N_MOUSE, N_GSM0710 and N_R394 line disciplines.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/tty_ldisc.h')
| -rw-r--r-- | include/linux/tty_ldisc.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h index f15c898ff462..b8347c207cb8 100644 --- a/include/linux/tty_ldisc.h +++ b/include/linux/tty_ldisc.h @@ -84,7 +84,8 @@ * processing. <cp> is a pointer to the buffer of input * character received by the device. <fp> is a pointer to a * pointer of flag bytes which indicate whether a character was - * received with a parity error, etc. + * received with a parity error, etc. <fp> may be NULL to indicate + * all data received is TTY_NORMAL. * * void (*write_wakeup)(struct tty_struct *); * @@ -118,7 +119,8 @@ * processing. <cp> is a pointer to the buffer of input * character received by the device. <fp> is a pointer to a * pointer of flag bytes which indicate whether a character was - * received with a parity error, etc. + * received with a parity error, etc. <fp> may be NULL to indicate + * all data received is TTY_NORMAL. * If assigned, prefer this function for automatic flow control. */ |