[PATCH] ptmx: fix duplicate idr_remove

[karo-tx-linux.git] / drivers / char / tty_io.c

diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 48d795bb8c4b7a33ec4d4a3bd81ea3537aa6cec9..b1f9a1582dd7d4be0ef363eeda933c7416bfd369 100644 (file)
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -351,10 +351,10 @@ int tty_buffer_request_room(struct tty_struct *tty, size_t size)
        spin_unlock_irqrestore(&tty->buf.lock, flags);
        return size;
 }
-
 EXPORT_SYMBOL_GPL(tty_buffer_request_room);
 
-int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars, size_t size)
+int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars,
+                               size_t size)
 {
        int copied = 0;
        do {
@@ -368,17 +368,16 @@ int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars, s
                tb->used += space;
                copied += space;
                chars += space;
-/*             printk("Flip insert %d.\n", space); */
        }
        /* There is a small chance that we need to split the data over
           several buffers. If this is the case we must loop */
        while (unlikely(size > copied));
        return copied;
 }
+EXPORT_SYMBOL(tty_insert_flip_string);
 
-EXPORT_SYMBOL_GPL(tty_insert_flip_string);
-
-int tty_insert_flip_string_flags(struct tty_struct *tty, const unsigned char *chars, const char *flags, size_t size)
+int tty_insert_flip_string_flags(struct tty_struct *tty,
+               const unsigned char *chars, const char *flags, size_t size)
 {
        int copied = 0;
        do {
@@ -399,9 +398,20 @@ int tty_insert_flip_string_flags(struct tty_struct *tty, const unsigned char *ch
        while (unlikely(size > copied));
        return copied;
 }
-
 EXPORT_SYMBOL_GPL(tty_insert_flip_string_flags);
 
+void tty_schedule_flip(struct tty_struct *tty)
+{
+       unsigned long flags;
+       spin_lock_irqsave(&tty->buf.lock, flags);
+       if (tty->buf.tail != NULL) {
+               tty->buf.tail->active = 0;
+               tty->buf.tail->commit = tty->buf.tail->used;
+       }
+       spin_unlock_irqrestore(&tty->buf.lock, flags);
+       schedule_delayed_work(&tty->buf.work, 1);
+}
+EXPORT_SYMBOL(tty_schedule_flip);
 
 /*
  *     Prepare a block of space in the buffer for data. Returns the length
@@ -543,14 +553,12 @@ void tty_ldisc_put(int disc)
        struct tty_ldisc *ld;
        unsigned long flags;
        
-       if (disc < N_TTY || disc >= NR_LDISCS)
-               BUG();
+       BUG_ON(disc < N_TTY || disc >= NR_LDISCS);
                
        spin_lock_irqsave(&tty_ldisc_lock, flags);
        ld = &tty_ldiscs[disc];
-       if(ld->refcount == 0)
-               BUG();
-       ld->refcount --;
+       BUG_ON(ld->refcount == 0);
+       ld->refcount--;
        module_put(ld->owner);
        spin_unlock_irqrestore(&tty_ldisc_lock, flags);
 }
@@ -645,8 +653,7 @@ void tty_ldisc_deref(struct tty_ldisc *ld)
 {
        unsigned long flags;
 
-       if(ld == NULL)
-               BUG();
+       BUG_ON(ld == NULL);
                
        spin_lock_irqsave(&tty_ldisc_lock, flags);
        if(ld->refcount == 0)
@@ -1097,8 +1104,8 @@ static void do_tty_hangup(void *data)
                                p->signal->tty = NULL;
                        if (!p->signal->leader)
                                continue;
-                       send_group_sig_info(SIGHUP, SEND_SIG_PRIV, p);
-                       send_group_sig_info(SIGCONT, SEND_SIG_PRIV, p);
+                       group_send_sig_info(SIGHUP, SEND_SIG_PRIV, p);
+                       group_send_sig_info(SIGCONT, SEND_SIG_PRIV, p);
                        if (tty->pgrp > 0)
                                p->signal->tty_old_pgrp = tty->pgrp;
                } while_each_task_pid(tty->session, PIDTYPE_SID, p);
@@ -2188,6 +2195,7 @@ static int ptmx_open(struct inode * inode, struct file * filp)
                return 0;
 out1:
        release_dev(filp);
+       return retval;
 out:
        down(&allocated_ptys_lock);
        idr_remove(&allocated_ptys, index);
@@ -2675,7 +2683,7 @@ static void __do_SAK(void *arg)
        tty_hangup(tty);
 #else
        struct tty_struct *tty = arg;
-       struct task_struct *p;
+       struct task_struct *g, *p;
        int session;
        int             i;
        struct file     *filp;
@@ -2696,8 +2704,18 @@ static void __do_SAK(void *arg)
                tty->driver->flush_buffer(tty);
        
        read_lock(&tasklist_lock);
+       /* Kill the entire session */
        do_each_task_pid(session, PIDTYPE_SID, p) {
-               if (p->signal->tty == tty || session > 0) {
+               printk(KERN_NOTICE "SAK: killed process %d"
+                       " (%s): p->signal->session==tty->session\n",
+                       p->pid, p->comm);
+               send_sig(SIGKILL, p, 1);
+       } while_each_task_pid(session, PIDTYPE_SID, p);
+       /* Now kill any processes that happen to have the
+        * tty open.
+        */
+       do_each_thread(g, p) {
+               if (p->signal->tty == tty) {
                        printk(KERN_NOTICE "SAK: killed process %d"
                            " (%s): p->signal->session==tty->session\n",
                            p->pid, p->comm);
@@ -2724,7 +2742,7 @@ static void __do_SAK(void *arg)
                        rcu_read_unlock();
                }
                task_unlock(p);
-       } while_each_task_pid(session, PIDTYPE_SID, p);
+       } while_each_thread(g, p);
        read_unlock(&tasklist_lock);
 #endif
 }