[PATCH 68/69] TTY: rfcomm/tty, remove work for tty_wakeup

From: Jiri Slaby
Date: Mon Apr 02 2012 - 08:01:53 EST


tty_wakeup is safe to be called from all contexts. No need to schedule
a work for that. Let us call it directly like in other drivers.

This allows us to kill another member of rfcomm_dev structure.

Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
net/bluetooth/rfcomm/tty.c | 22 +++-------------------
1 file changed, 3 insertions(+), 19 deletions(-)

diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index da4f545..0433d26 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -65,7 +65,6 @@ struct rfcomm_dev {

struct rfcomm_dlc *dlc;
wait_queue_head_t wait;
- struct work_struct wakeup_task;

struct device *tty_dev;

@@ -81,8 +80,6 @@ static void rfcomm_dev_data_ready(struct rfcomm_dlc *dlc, struct sk_buff *skb);
static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err);
static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig);

-static void rfcomm_tty_wakeup(struct work_struct *work);
-
/* ---- Device functions ---- */

/*
@@ -248,7 +245,6 @@ static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc)
tty_port_init(&dev->port);
dev->port.ops = &rfcomm_port_ops;
init_waitqueue_head(&dev->wait);
- INIT_WORK(&dev->wakeup_task, rfcomm_tty_wakeup);

skb_queue_head_init(&dev->pending);

@@ -340,9 +336,10 @@ static inline unsigned int rfcomm_room(struct rfcomm_dlc *dlc)
static void rfcomm_wfree(struct sk_buff *skb)
{
struct rfcomm_dev *dev = (void *) skb->sk;
+ struct tty_struct *tty = dev->port.tty;
atomic_sub(skb->truesize, &dev->wmem_alloc);
- if (test_bit(RFCOMM_TTY_ATTACHED, &dev->flags))
- queue_work(system_nrt_wq, &dev->wakeup_task);
+ if (test_bit(RFCOMM_TTY_ATTACHED, &dev->flags) && tty)
+ tty_wakeup(tty);
tty_port_put(&dev->port);
}

@@ -625,18 +622,6 @@ static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig)
}

/* ---- TTY functions ---- */
-static void rfcomm_tty_wakeup(struct work_struct *work)
-{
- struct rfcomm_dev *dev = container_of(work, struct rfcomm_dev,
- wakeup_task);
- struct tty_struct *tty = dev->port.tty;
- if (!tty)
- return;
-
- BT_DBG("dev %p tty %p", dev, tty);
- tty_wakeup(tty);
-}
-
static void rfcomm_tty_copy_pending(struct rfcomm_dev *dev)
{
struct tty_struct *tty = dev->port.tty;
@@ -753,7 +738,6 @@ static void rfcomm_tty_close(struct tty_struct *tty, struct file *filp)
rfcomm_dlc_close(dev->dlc, 0);

clear_bit(RFCOMM_TTY_ATTACHED, &dev->flags);
- cancel_work_sync(&dev->wakeup_task);

rfcomm_dlc_lock(dev->dlc);
tty->driver_data = NULL;
--
1.7.9.2


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