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Commit 560460b8 authored by Jiri Slaby's avatar Jiri Slaby Committed by Greg Kroah-Hartman
Browse files

TTY: bfin_jtag_comm, add tty_port 



And use open count from there. Switch to tty from there will follow.

Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: uclinux-dist-devel@blackfin.uclinux.org
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ba186e7d

drivers/tty/bfin_jtag_comm.c

+5 −5
Original line number Diff line number Diff line
@@ -63,8 +63,8 @@ static inline uint32_t bfin_write_emudat_chars(char a, char b, char c, char d) 
static struct tty_driver *bfin_jc_driver;

static struct task_struct *bfin_jc_kthread;

static struct tty_struct * volatile bfin_jc_tty;

static unsigned long bfin_jc_count;

static DEFINE_MUTEX(bfin_jc_tty_mutex);

static struct tty_port port;

static volatile struct circ_buf bfin_jc_write_buf;



static int
@@ -150,8 +150,7 @@ static int 
bfin_jc_open(struct tty_struct *tty, struct file *filp)

{

	mutex_lock(&bfin_jc_tty_mutex);

	pr_debug("open %lu\n", bfin_jc_count);

	++bfin_jc_count;

	port.count++;

	bfin_jc_tty = tty;

	wake_up_process(bfin_jc_kthread);

	mutex_unlock(&bfin_jc_tty_mutex);
@@ -162,8 +161,7 @@ static void 
bfin_jc_close(struct tty_struct *tty, struct file *filp)

{

	mutex_lock(&bfin_jc_tty_mutex);

	pr_debug("close %lu\n", bfin_jc_count);

	if (--bfin_jc_count == 0)

	if (--port.count == 0)

		bfin_jc_tty = NULL;

	wake_up_process(bfin_jc_kthread);

	mutex_unlock(&bfin_jc_tty_mutex);
@@ -242,6 +240,8 @@ static int __init bfin_jc_init(void) 
{

	int ret;



	tty_port_init(&port);



	bfin_jc_kthread = kthread_create(bfin_jc_emudat_manager, NULL, DRV_NAME);

	if (IS_ERR(bfin_jc_kthread))

		return PTR_ERR(bfin_jc_kthread);