TTY: bfin_jtag_comm, add tty_port
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>
diff --git a/drivers/tty/bfin_jtag_comm.c b/drivers/tty/bfin_jtag_comm.c
index 946f799..d81013c 100644
--- a/drivers/tty/bfin_jtag_comm.c
+++ b/drivers/tty/bfin_jtag_comm.c
@@ -63,8 +63,8 @@
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 @@
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 @@
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 @@
{
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);