From c3485ee0d560b182e1e0f67d67246718739f0782 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Thu, 2 Feb 2017 13:48:05 -0600 Subject: tty_port: Add port client functions Introduce a client (upward direction) operations struct for tty_port clients. Initially supported operations are for receiving data and write wake-up. This will allow for having clients other than an ldisc. Convert the calls to the ldisc to use the client ops as the default operations. Signed-off-by: Rob Herring Reviewed-By: Sebastian Reichel Tested-By: Sebastian Reichel Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_buffer.c | 17 +++-------------- 1 file changed, 3 insertions(+), 14 deletions(-) (limited to 'drivers/tty/tty_buffer.c') diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c index f4dc3e296dd5..4e7a4e9dcf4d 100644 --- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -437,7 +437,7 @@ int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p, EXPORT_SYMBOL_GPL(tty_ldisc_receive_buf); static int -receive_buf(struct tty_ldisc *ld, struct tty_buffer *head, int count) +receive_buf(struct tty_port *port, struct tty_buffer *head, int count) { unsigned char *p = char_buf_ptr(head, head->read); char *f = NULL; @@ -445,7 +445,7 @@ receive_buf(struct tty_ldisc *ld, struct tty_buffer *head, int count) if (~head->flags & TTYB_NORMAL) f = flag_buf_ptr(head, head->read); - return tty_ldisc_receive_buf(ld, p, f, count); + return port->client_ops->receive_buf(port, p, f, count); } /** @@ -465,16 +465,6 @@ static void flush_to_ldisc(struct work_struct *work) { struct tty_port *port = container_of(work, struct tty_port, buf.work); struct tty_bufhead *buf = &port->buf; - struct tty_struct *tty; - struct tty_ldisc *disc; - - tty = READ_ONCE(port->itty); - if (tty == NULL) - return; - - disc = tty_ldisc_ref(tty); - if (disc == NULL) - return; mutex_lock(&buf->lock); @@ -504,7 +494,7 @@ static void flush_to_ldisc(struct work_struct *work) continue; } - count = receive_buf(disc, head, count); + count = receive_buf(port, head, count); if (!count) break; head->read += count; @@ -512,7 +502,6 @@ static void flush_to_ldisc(struct work_struct *work) mutex_unlock(&buf->lock); - tty_ldisc_deref(disc); } /** -- cgit v1.2.3