lkml.org 
[lkml]   [2012]   [Apr]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 07/69] TTY: isdn, do not play with module refcounts
Date
The module which called allocate_tty_driver is already refcounted by
the TTY layer automatically. And since THIS_MODULE is isdn_tty and it
allocated the tty_driver, there is no need to do the counts in isdn's
tty->ops->open/close.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Karsten Keil <isdn@linux-pingi.de>
---
drivers/isdn/i4l/isdn_tty.c | 11 -----------
include/linux/isdn.h | 1 -
2 files changed, 12 deletions(-)

diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index bcf4bbe..1ff3072 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -1584,10 +1584,6 @@ isdn_tty_open(struct tty_struct *tty, struct file *filp)
info = &dev->mdm.info[tty->index];
if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
return -ENODEV;
- if (!try_module_get(info->owner)) {
- printk(KERN_WARNING "%s: cannot reserve module\n", __func__);
- return -ENODEV;
- }
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
info->count);
@@ -1603,7 +1599,6 @@ isdn_tty_open(struct tty_struct *tty, struct file *filp)
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_open return after startup\n");
#endif
- module_put(info->owner);
return retval;
}
retval = isdn_tty_block_til_ready(tty, filp, info);
@@ -1611,7 +1606,6 @@ isdn_tty_open(struct tty_struct *tty, struct file *filp)
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
#endif
- module_put(info->owner);
return retval;
}
#ifdef ISDN_DEBUG_MODEM_OPEN
@@ -1659,7 +1653,6 @@ isdn_tty_close(struct tty_struct *tty, struct file *filp)
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
#endif
- module_put(info->owner);
return;
}
info->flags |= ASYNC_CLOSING;
@@ -1692,7 +1685,6 @@ isdn_tty_close(struct tty_struct *tty, struct file *filp)
info->tty = NULL;
info->ncarrier = 0;
tty->closing = 0;
- module_put(info->owner);
if (info->blocked_open) {
msleep_interruptible(500);
wake_up_interruptible(&info->open_wait);
@@ -1880,9 +1872,6 @@ isdn_tty_modem_init(void)
goto err_unregister;
}
#endif
-#ifdef MODULE
- info->owner = THIS_MODULE;
-#endif
spin_lock_init(&info->readlock);
sprintf(info->last_cause, "0000");
sprintf(info->last_num, "none");
diff --git a/include/linux/isdn.h b/include/linux/isdn.h
index 1b4b4c1..66d9d71 100644
--- a/include/linux/isdn.h
+++ b/include/linux/isdn.h
@@ -435,7 +435,6 @@ typedef struct atemu {
/* Private data (similar to async_struct in <linux/serial.h>) */
typedef struct modem_info {
int magic;
- struct module *owner;
int flags; /* defined in tty.h */
int x_char; /* xon/xoff character */
int mcr; /* Modem control register */
--
1.7.9.2



\
 
 \ /
  Last update: 2012-04-02 14:07    [W:0.195 / U:4.860 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site