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TTY: bfin_jtag_comm, add tty_port

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

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: uclinux-dist-devel@blackfin.uclinux.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2012-04-02 13:54:19 +02:00 committed by Greg Kroah-Hartman
parent ba186e7d17
commit 560460b8b7
1 changed files with 5 additions and 5 deletions
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10
drivers/tty/bfin_jtag_comm.c
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@ -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);