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Diffstat (limited to 'net/bluetooth/rfcomm/tty.c')
-rw-r--r--net/bluetooth/rfcomm/tty.c67
1 files changed, 33 insertions, 34 deletions
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index c258796313e0..a2d4f5122a6a 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -34,6 +34,7 @@
#include <linux/capability.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
+#include <linux/workqueue.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
@@ -65,7 +66,7 @@ struct rfcomm_dev {
struct rfcomm_dlc *dlc;
struct tty_struct *tty;
wait_queue_head_t wait;
- struct tasklet_struct wakeup_task;
+ struct work_struct wakeup_task;
struct device *tty_dev;
@@ -75,13 +76,13 @@ struct rfcomm_dev {
};
static LIST_HEAD(rfcomm_dev_list);
-static DEFINE_RWLOCK(rfcomm_dev_lock);
+static DEFINE_SPINLOCK(rfcomm_dev_lock);
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(unsigned long arg);
+static void rfcomm_tty_wakeup(struct work_struct *work);
/* ---- Device functions ---- */
static void rfcomm_dev_destruct(struct rfcomm_dev *dev)
@@ -133,13 +134,10 @@ static inline void rfcomm_dev_put(struct rfcomm_dev *dev)
static struct rfcomm_dev *__rfcomm_dev_get(int id)
{
struct rfcomm_dev *dev;
- struct list_head *p;
- list_for_each(p, &rfcomm_dev_list) {
- dev = list_entry(p, struct rfcomm_dev, list);
+ list_for_each_entry(dev, &rfcomm_dev_list, list)
if (dev->id == id)
return dev;
- }
return NULL;
}
@@ -148,7 +146,7 @@ static inline struct rfcomm_dev *rfcomm_dev_get(int id)
{
struct rfcomm_dev *dev;
- read_lock(&rfcomm_dev_lock);
+ spin_lock(&rfcomm_dev_lock);
dev = __rfcomm_dev_get(id);
@@ -159,7 +157,7 @@ static inline struct rfcomm_dev *rfcomm_dev_get(int id)
rfcomm_dev_hold(dev);
}
- read_unlock(&rfcomm_dev_lock);
+ spin_unlock(&rfcomm_dev_lock);
return dev;
}
@@ -197,7 +195,7 @@ static DEVICE_ATTR(channel, S_IRUGO, show_channel, NULL);
static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc)
{
- struct rfcomm_dev *dev;
+ struct rfcomm_dev *dev, *entry;
struct list_head *head = &rfcomm_dev_list, *p;
int err = 0;
@@ -207,13 +205,13 @@ static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc)
if (!dev)
return -ENOMEM;
- write_lock_bh(&rfcomm_dev_lock);
+ spin_lock(&rfcomm_dev_lock);
if (req->dev_id < 0) {
dev->id = 0;
- list_for_each(p, &rfcomm_dev_list) {
- if (list_entry(p, struct rfcomm_dev, list)->id != dev->id)
+ list_for_each_entry(entry, &rfcomm_dev_list, list) {
+ if (entry->id != dev->id)
break;
dev->id++;
@@ -222,9 +220,7 @@ static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc)
} else {
dev->id = req->dev_id;
- list_for_each(p, &rfcomm_dev_list) {
- struct rfcomm_dev *entry = list_entry(p, struct rfcomm_dev, list);
-
+ list_for_each_entry(entry, &rfcomm_dev_list, list) {
if (entry->id == dev->id) {
err = -EADDRINUSE;
goto out;
@@ -257,7 +253,7 @@ static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc)
atomic_set(&dev->opened, 0);
init_waitqueue_head(&dev->wait);
- tasklet_init(&dev->wakeup_task, rfcomm_tty_wakeup, (unsigned long) dev);
+ INIT_WORK(&dev->wakeup_task, rfcomm_tty_wakeup);
skb_queue_head_init(&dev->pending);
@@ -294,7 +290,7 @@ static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc)
__module_get(THIS_MODULE);
out:
- write_unlock_bh(&rfcomm_dev_lock);
+ spin_unlock(&rfcomm_dev_lock);
if (err < 0)
goto free;
@@ -331,9 +327,9 @@ static void rfcomm_dev_del(struct rfcomm_dev *dev)
if (atomic_read(&dev->opened) > 0)
return;
- write_lock_bh(&rfcomm_dev_lock);
+ spin_lock(&rfcomm_dev_lock);
list_del_init(&dev->list);
- write_unlock_bh(&rfcomm_dev_lock);
+ spin_unlock(&rfcomm_dev_lock);
rfcomm_dev_put(dev);
}
@@ -351,7 +347,7 @@ static void rfcomm_wfree(struct sk_buff *skb)
struct rfcomm_dev *dev = (void *) skb->sk;
atomic_sub(skb->truesize, &dev->wmem_alloc);
if (test_bit(RFCOMM_TTY_ATTACHED, &dev->flags))
- tasklet_schedule(&dev->wakeup_task);
+ queue_work(system_nrt_wq, &dev->wakeup_task);
rfcomm_dev_put(dev);
}
@@ -455,9 +451,9 @@ static int rfcomm_release_dev(void __user *arg)
static int rfcomm_get_dev_list(void __user *arg)
{
+ struct rfcomm_dev *dev;
struct rfcomm_dev_list_req *dl;
struct rfcomm_dev_info *di;
- struct list_head *p;
int n = 0, size, err;
u16 dev_num;
@@ -477,10 +473,9 @@ static int rfcomm_get_dev_list(void __user *arg)
di = dl->dev_info;
- read_lock_bh(&rfcomm_dev_lock);
+ spin_lock(&rfcomm_dev_lock);
- list_for_each(p, &rfcomm_dev_list) {
- struct rfcomm_dev *dev = list_entry(p, struct rfcomm_dev, list);
+ list_for_each_entry(dev, &rfcomm_dev_list, list) {
if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags))
continue;
(di + n)->id = dev->id;
@@ -493,7 +488,7 @@ static int rfcomm_get_dev_list(void __user *arg)
break;
}
- read_unlock_bh(&rfcomm_dev_lock);
+ spin_unlock(&rfcomm_dev_lock);
dl->dev_num = n;
size = sizeof(*dl) + n * sizeof(*di);
@@ -635,9 +630,10 @@ static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig)
}
/* ---- TTY functions ---- */
-static void rfcomm_tty_wakeup(unsigned long arg)
+static void rfcomm_tty_wakeup(struct work_struct *work)
{
- struct rfcomm_dev *dev = (void *) arg;
+ struct rfcomm_dev *dev = container_of(work, struct rfcomm_dev,
+ wakeup_task);
struct tty_struct *tty = dev->tty;
if (!tty)
return;
@@ -762,7 +758,7 @@ 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);
- tasklet_kill(&dev->wakeup_task);
+ cancel_work_sync(&dev->wakeup_task);
rfcomm_dlc_lock(dev->dlc);
tty->driver_data = NULL;
@@ -770,9 +766,9 @@ static void rfcomm_tty_close(struct tty_struct *tty, struct file *filp)
rfcomm_dlc_unlock(dev->dlc);
if (test_bit(RFCOMM_TTY_RELEASED, &dev->flags)) {
- write_lock_bh(&rfcomm_dev_lock);
+ spin_lock(&rfcomm_dev_lock);
list_del_init(&dev->list);
- write_unlock_bh(&rfcomm_dev_lock);
+ spin_unlock(&rfcomm_dev_lock);
rfcomm_dev_put(dev);
}
@@ -1155,9 +1151,11 @@ static const struct tty_operations rfcomm_ops = {
int __init rfcomm_init_ttys(void)
{
+ int error;
+
rfcomm_tty_driver = alloc_tty_driver(RFCOMM_TTY_PORTS);
if (!rfcomm_tty_driver)
- return -1;
+ return -ENOMEM;
rfcomm_tty_driver->owner = THIS_MODULE;
rfcomm_tty_driver->driver_name = "rfcomm";
@@ -1172,10 +1170,11 @@ int __init rfcomm_init_ttys(void)
rfcomm_tty_driver->init_termios.c_lflag &= ~ICANON;
tty_set_operations(rfcomm_tty_driver, &rfcomm_ops);
- if (tty_register_driver(rfcomm_tty_driver)) {
+ error = tty_register_driver(rfcomm_tty_driver);
+ if (error) {
BT_ERR("Can't register RFCOMM TTY driver");
put_tty_driver(rfcomm_tty_driver);
- return -1;
+ return error;
}
BT_INFO("RFCOMM TTY layer initialized");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.