diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-01 17:51:54 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-01 17:51:54 -0700 |
commit | 20b4fb485227404329e41ad15588afad3df23050 (patch) | |
tree | f3e099f0ab3da8a93b447203e294d2bb22f6dc05 /drivers/isdn/mISDN | |
parent | b9394d8a657cd3c064fa432aa0905c1b58b38fe9 (diff) | |
parent | ac3e3c5b1164397656df81b9e9ab4991184d3236 (diff) |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull VFS updates from Al Viro,
Misc cleanups all over the place, mainly wrt /proc interfaces (switch
create_proc_entry to proc_create(), get rid of the deprecated
create_proc_read_entry() in favor of using proc_create_data() and
seq_file etc).
7kloc removed.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (204 commits)
don't bother with deferred freeing of fdtables
proc: Move non-public stuff from linux/proc_fs.h to fs/proc/internal.h
proc: Make the PROC_I() and PDE() macros internal to procfs
proc: Supply a function to remove a proc entry by PDE
take cgroup_open() and cpuset_open() to fs/proc/base.c
ppc: Clean up scanlog
ppc: Clean up rtas_flash driver somewhat
hostap: proc: Use remove_proc_subtree()
drm: proc: Use remove_proc_subtree()
drm: proc: Use minor->index to label things, not PDE->name
drm: Constify drm_proc_list[]
zoran: Don't print proc_dir_entry data in debug
reiserfs: Don't access the proc_dir_entry in r_open(), r_start() r_show()
proc: Supply an accessor for getting the data from a PDE's parent
airo: Use remove_proc_subtree()
rtl8192u: Don't need to save device proc dir PDE
rtl8187se: Use a dir under /proc/net/r8180/
proc: Add proc_mkdir_data()
proc: Move some bits from linux/proc_fs.h to linux/{of.h,signal.h,tty.h}
proc: Move PDE_NET() to fs/proc/proc_net.c
...
Diffstat (limited to 'drivers/isdn/mISDN')
-rw-r--r-- | drivers/isdn/mISDN/timerdev.c | 76 |
1 files changed, 41 insertions, 35 deletions
diff --git a/drivers/isdn/mISDN/timerdev.c b/drivers/isdn/mISDN/timerdev.c index 1094667d8f31..9438d7ec3308 100644 --- a/drivers/isdn/mISDN/timerdev.c +++ b/drivers/isdn/mISDN/timerdev.c @@ -64,7 +64,6 @@ mISDN_open(struct inode *ino, struct file *filep) dev->work = 0; init_waitqueue_head(&dev->wait); filep->private_data = dev; - __module_get(THIS_MODULE); return nonseekable_open(ino, filep); } @@ -72,19 +71,28 @@ static int mISDN_close(struct inode *ino, struct file *filep) { struct mISDNtimerdev *dev = filep->private_data; + struct list_head *list = &dev->pending; struct mISDNtimer *timer, *next; if (*debug & DEBUG_TIMER) printk(KERN_DEBUG "%s(%p,%p)\n", __func__, ino, filep); - list_for_each_entry_safe(timer, next, &dev->pending, list) { - del_timer(&timer->tl); + + spin_lock_irq(&dev->lock); + while (!list_empty(list)) { + timer = list_first_entry(list, struct mISDNtimer, list); + spin_unlock_irq(&dev->lock); + del_timer_sync(&timer->tl); + spin_lock_irq(&dev->lock); + /* it might have been moved to ->expired */ + list_del(&timer->list); kfree(timer); } + spin_unlock_irq(&dev->lock); + list_for_each_entry_safe(timer, next, &dev->expired, list) { kfree(timer); } kfree(dev); - module_put(THIS_MODULE); return 0; } @@ -92,36 +100,41 @@ static ssize_t mISDN_read(struct file *filep, char __user *buf, size_t count, loff_t *off) { struct mISDNtimerdev *dev = filep->private_data; + struct list_head *list = &dev->expired; struct mISDNtimer *timer; - u_long flags; int ret = 0; if (*debug & DEBUG_TIMER) printk(KERN_DEBUG "%s(%p, %p, %d, %p)\n", __func__, filep, buf, (int)count, off); - if (list_empty(&dev->expired) && (dev->work == 0)) { + if (count < sizeof(int)) + return -ENOSPC; + + spin_lock_irq(&dev->lock); + while (list_empty(list) && (dev->work == 0)) { + spin_unlock_irq(&dev->lock); if (filep->f_flags & O_NONBLOCK) return -EAGAIN; wait_event_interruptible(dev->wait, (dev->work || - !list_empty(&dev->expired))); + !list_empty(list))); if (signal_pending(current)) return -ERESTARTSYS; + spin_lock_irq(&dev->lock); } - if (count < sizeof(int)) - return -ENOSPC; if (dev->work) dev->work = 0; - if (!list_empty(&dev->expired)) { - spin_lock_irqsave(&dev->lock, flags); - timer = (struct mISDNtimer *)dev->expired.next; + if (!list_empty(list)) { + timer = list_first_entry(list, struct mISDNtimer, list); list_del(&timer->list); - spin_unlock_irqrestore(&dev->lock, flags); + spin_unlock_irq(&dev->lock); if (put_user(timer->id, (int __user *)buf)) ret = -EFAULT; else ret = sizeof(int); kfree(timer); + } else { + spin_unlock_irq(&dev->lock); } return ret; } @@ -153,7 +166,8 @@ dev_expire_timer(unsigned long data) u_long flags; spin_lock_irqsave(&timer->dev->lock, flags); - list_move_tail(&timer->list, &timer->dev->expired); + if (timer->id >= 0) + list_move_tail(&timer->list, &timer->dev->expired); spin_unlock_irqrestore(&timer->dev->lock, flags); wake_up_interruptible(&timer->dev->wait); } @@ -162,7 +176,6 @@ static int misdn_add_timer(struct mISDNtimerdev *dev, int timeout) { int id; - u_long flags; struct mISDNtimer *timer; if (!timeout) { @@ -173,19 +186,16 @@ misdn_add_timer(struct mISDNtimerdev *dev, int timeout) timer = kzalloc(sizeof(struct mISDNtimer), GFP_KERNEL); if (!timer) return -ENOMEM; - spin_lock_irqsave(&dev->lock, flags); - timer->id = dev->next_id++; + timer->dev = dev; + setup_timer(&timer->tl, dev_expire_timer, (long)timer); + spin_lock_irq(&dev->lock); + id = timer->id = dev->next_id++; if (dev->next_id < 0) dev->next_id = 1; list_add_tail(&timer->list, &dev->pending); - spin_unlock_irqrestore(&dev->lock, flags); - timer->dev = dev; - timer->tl.data = (long)timer; - timer->tl.function = dev_expire_timer; - init_timer(&timer->tl); timer->tl.expires = jiffies + ((HZ * (u_long)timeout) / 1000); add_timer(&timer->tl); - id = timer->id; + spin_unlock_irq(&dev->lock); } return id; } @@ -193,26 +203,21 @@ misdn_add_timer(struct mISDNtimerdev *dev, int timeout) static int misdn_del_timer(struct mISDNtimerdev *dev, int id) { - u_long flags; struct mISDNtimer *timer; - int ret = 0; - spin_lock_irqsave(&dev->lock, flags); + spin_lock_irq(&dev->lock); list_for_each_entry(timer, &dev->pending, list) { if (timer->id == id) { list_del_init(&timer->list); - /* RED-PEN AK: race -- timer can be still running on - * other CPU. Needs reference count I think - */ - del_timer(&timer->tl); - ret = timer->id; + timer->id = -1; + spin_unlock_irq(&dev->lock); + del_timer_sync(&timer->tl); kfree(timer); - goto unlock; + return id; } } -unlock: - spin_unlock_irqrestore(&dev->lock, flags); - return ret; + spin_unlock_irq(&dev->lock); + return 0; } static long @@ -262,6 +267,7 @@ mISDN_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) } static const struct file_operations mISDN_fops = { + .owner = THIS_MODULE, .read = mISDN_read, .poll = mISDN_poll, .unlocked_ioctl = mISDN_ioctl, |