576 lines
12 KiB
C
576 lines
12 KiB
C
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/* $Id: divasi.c,v 1.25.6.2 2005/01/31 12:22:20 armin Exp $
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*
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* Driver for Eicon DIVA Server ISDN cards.
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* User Mode IDI Interface
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*
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* Copyright 2000-2003 by Armin Schindler (mac@melware.de)
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* Copyright 2000-2003 Cytronics & Melware (info@melware.de)
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/poll.h>
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#include <linux/proc_fs.h>
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#include <linux/skbuff.h>
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#include <linux/seq_file.h>
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#include <linux/uaccess.h>
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#include "platform.h"
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#include "di_defs.h"
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#include "divasync.h"
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#include "um_xdi.h"
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#include "um_idi.h"
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static char *main_revision = "$Revision: 1.25.6.2 $";
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static int major;
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MODULE_DESCRIPTION("User IDI Interface for Eicon ISDN cards");
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MODULE_AUTHOR("Cytronics & Melware, Eicon Networks");
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MODULE_SUPPORTED_DEVICE("DIVA card driver");
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MODULE_LICENSE("GPL");
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typedef struct _diva_um_idi_os_context {
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wait_queue_head_t read_wait;
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wait_queue_head_t close_wait;
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struct timer_list diva_timer_id;
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int aborted;
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int adapter_nr;
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} diva_um_idi_os_context_t;
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static char *DRIVERNAME = "Eicon DIVA - User IDI (http://www.melware.net)";
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static char *DRIVERLNAME = "diva_idi";
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static char *DEVNAME = "DivasIDI";
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char *DRIVERRELEASE_IDI = "2.0";
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extern int idifunc_init(void);
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extern void idifunc_finit(void);
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/*
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* helper functions
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*/
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static char *getrev(const char *revision)
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{
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char *rev;
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char *p;
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if ((p = strchr(revision, ':'))) {
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rev = p + 2;
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p = strchr(rev, '$');
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*--p = 0;
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} else
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rev = "1.0";
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return rev;
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}
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/*
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* LOCALS
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*/
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static ssize_t um_idi_read(struct file *file, char __user *buf, size_t count,
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loff_t *offset);
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static ssize_t um_idi_write(struct file *file, const char __user *buf,
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size_t count, loff_t *offset);
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static unsigned int um_idi_poll(struct file *file, poll_table *wait);
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static int um_idi_open(struct inode *inode, struct file *file);
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static int um_idi_release(struct inode *inode, struct file *file);
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static int remove_entity(void *entity);
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static void diva_um_timer_function(struct timer_list *t);
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/*
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* proc entry
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*/
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extern struct proc_dir_entry *proc_net_eicon;
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static struct proc_dir_entry *um_idi_proc_entry = NULL;
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static int um_idi_proc_show(struct seq_file *m, void *v)
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{
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char tmprev[32];
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seq_printf(m, "%s\n", DRIVERNAME);
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seq_printf(m, "name : %s\n", DRIVERLNAME);
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seq_printf(m, "release : %s\n", DRIVERRELEASE_IDI);
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strcpy(tmprev, main_revision);
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seq_printf(m, "revision : %s\n", getrev(tmprev));
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seq_printf(m, "build : %s\n", DIVA_BUILD);
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seq_printf(m, "major : %d\n", major);
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return 0;
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}
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static int um_idi_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, um_idi_proc_show, NULL);
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}
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static const struct file_operations um_idi_proc_fops = {
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.owner = THIS_MODULE,
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.open = um_idi_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int __init create_um_idi_proc(void)
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{
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um_idi_proc_entry = proc_create(DRIVERLNAME, S_IRUGO, proc_net_eicon,
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&um_idi_proc_fops);
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if (!um_idi_proc_entry)
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return (0);
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return (1);
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}
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static void remove_um_idi_proc(void)
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{
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if (um_idi_proc_entry) {
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remove_proc_entry(DRIVERLNAME, proc_net_eicon);
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um_idi_proc_entry = NULL;
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}
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}
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static const struct file_operations divas_idi_fops = {
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.owner = THIS_MODULE,
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.llseek = no_llseek,
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.read = um_idi_read,
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.write = um_idi_write,
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.poll = um_idi_poll,
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.open = um_idi_open,
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.release = um_idi_release
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};
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static void divas_idi_unregister_chrdev(void)
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{
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unregister_chrdev(major, DEVNAME);
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}
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static int __init divas_idi_register_chrdev(void)
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{
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if ((major = register_chrdev(0, DEVNAME, &divas_idi_fops)) < 0)
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{
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printk(KERN_ERR "%s: failed to create /dev entry.\n",
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DRIVERLNAME);
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return (0);
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}
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return (1);
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}
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/*
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** Driver Load
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*/
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static int __init divasi_init(void)
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{
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char tmprev[50];
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int ret = 0;
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printk(KERN_INFO "%s\n", DRIVERNAME);
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printk(KERN_INFO "%s: Rel:%s Rev:", DRIVERLNAME, DRIVERRELEASE_IDI);
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strcpy(tmprev, main_revision);
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printk("%s Build: %s\n", getrev(tmprev), DIVA_BUILD);
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if (!divas_idi_register_chrdev()) {
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ret = -EIO;
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goto out;
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}
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if (!create_um_idi_proc()) {
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divas_idi_unregister_chrdev();
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printk(KERN_ERR "%s: failed to create proc entry.\n",
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DRIVERLNAME);
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ret = -EIO;
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goto out;
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}
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if (!(idifunc_init())) {
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remove_um_idi_proc();
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divas_idi_unregister_chrdev();
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printk(KERN_ERR "%s: failed to connect to DIDD.\n",
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DRIVERLNAME);
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ret = -EIO;
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goto out;
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}
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printk(KERN_INFO "%s: started with major %d\n", DRIVERLNAME, major);
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out:
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return (ret);
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}
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/*
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** Driver Unload
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*/
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static void __exit divasi_exit(void)
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{
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idifunc_finit();
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remove_um_idi_proc();
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divas_idi_unregister_chrdev();
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printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME);
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}
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module_init(divasi_init);
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module_exit(divasi_exit);
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/*
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* FILE OPERATIONS
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*/
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static int
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divas_um_idi_copy_to_user(void *os_handle, void *dst, const void *src,
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int length)
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{
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memcpy(dst, src, length);
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return (length);
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}
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static ssize_t
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um_idi_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
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{
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diva_um_idi_os_context_t *p_os;
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int ret = -EINVAL;
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void *data;
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if (!file->private_data) {
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return (-ENODEV);
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}
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if (!
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(p_os =
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(diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->
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private_data)))
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{
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return (-ENODEV);
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}
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if (p_os->aborted) {
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return (-ENODEV);
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}
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if (!(data = diva_os_malloc(0, count))) {
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return (-ENOMEM);
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}
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ret = diva_um_idi_read(file->private_data,
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file, data, count,
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divas_um_idi_copy_to_user);
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switch (ret) {
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case 0: /* no message available */
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ret = (-EAGAIN);
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break;
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case (-1): /* adapter was removed */
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ret = (-ENODEV);
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break;
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case (-2): /* message_length > length of user buffer */
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ret = (-EFAULT);
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break;
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}
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if (ret > 0) {
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if (copy_to_user(buf, data, ret)) {
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ret = (-EFAULT);
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}
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}
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diva_os_free(0, data);
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DBG_TRC(("read: ret %d", ret));
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return (ret);
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}
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static int
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divas_um_idi_copy_from_user(void *os_handle, void *dst, const void *src,
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int length)
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{
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memcpy(dst, src, length);
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return (length);
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}
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static int um_idi_open_adapter(struct file *file, int adapter_nr)
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{
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diva_um_idi_os_context_t *p_os;
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void *e =
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divas_um_idi_create_entity((dword) adapter_nr, (void *) file);
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if (!(file->private_data = e)) {
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return (0);
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}
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p_os = (diva_um_idi_os_context_t *) diva_um_id_get_os_context(e);
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init_waitqueue_head(&p_os->read_wait);
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init_waitqueue_head(&p_os->close_wait);
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timer_setup(&p_os->diva_timer_id, diva_um_timer_function, 0);
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p_os->aborted = 0;
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p_os->adapter_nr = adapter_nr;
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return (1);
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}
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static ssize_t
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um_idi_write(struct file *file, const char __user *buf, size_t count,
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loff_t *offset)
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{
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diva_um_idi_os_context_t *p_os;
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int ret = -EINVAL;
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void *data;
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int adapter_nr = 0;
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if (!file->private_data) {
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/* the first write() selects the adapter_nr */
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if (count == sizeof(int)) {
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if (copy_from_user
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((void *) &adapter_nr, buf,
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count)) return (-EFAULT);
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if (!(um_idi_open_adapter(file, adapter_nr)))
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return (-ENODEV);
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return (count);
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} else
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return (-ENODEV);
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}
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if (!(p_os =
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(diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->
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private_data)))
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{
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return (-ENODEV);
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}
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if (p_os->aborted) {
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return (-ENODEV);
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}
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if (!(data = diva_os_malloc(0, count))) {
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return (-ENOMEM);
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}
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if (copy_from_user(data, buf, count)) {
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ret = -EFAULT;
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} else {
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ret = diva_um_idi_write(file->private_data,
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file, data, count,
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divas_um_idi_copy_from_user);
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switch (ret) {
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case 0: /* no space available */
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ret = (-EAGAIN);
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break;
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case (-1): /* adapter was removed */
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ret = (-ENODEV);
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break;
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case (-2): /* length of user buffer > max message_length */
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ret = (-EFAULT);
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break;
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}
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}
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diva_os_free(0, data);
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DBG_TRC(("write: ret %d", ret));
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return (ret);
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}
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static unsigned int um_idi_poll(struct file *file, poll_table *wait)
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{
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diva_um_idi_os_context_t *p_os;
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if (!file->private_data) {
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return (POLLERR);
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}
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if ((!(p_os =
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(diva_um_idi_os_context_t *)
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diva_um_id_get_os_context(file->private_data)))
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|| p_os->aborted) {
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return (POLLERR);
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}
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poll_wait(file, &p_os->read_wait, wait);
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if (p_os->aborted) {
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return (POLLERR);
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}
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switch (diva_user_mode_idi_ind_ready(file->private_data, file)) {
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|
|
case (-1):
|
||
|
|
return (POLLERR);
|
||
|
|
|
||
|
|
case 0:
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
return (POLLIN | POLLRDNORM);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int um_idi_open(struct inode *inode, struct file *file)
|
||
|
|
{
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static int um_idi_release(struct inode *inode, struct file *file)
|
||
|
|
{
|
||
|
|
diva_um_idi_os_context_t *p_os;
|
||
|
|
unsigned int adapter_nr;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
if (!(file->private_data)) {
|
||
|
|
ret = -ENODEV;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!(p_os =
|
||
|
|
(diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->private_data))) {
|
||
|
|
ret = -ENODEV;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
adapter_nr = p_os->adapter_nr;
|
||
|
|
|
||
|
|
if ((ret = remove_entity(file->private_data))) {
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (divas_um_idi_delete_entity
|
||
|
|
((int) adapter_nr, file->private_data)) {
|
||
|
|
ret = -ENODEV;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
out:
|
||
|
|
return (ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
int diva_os_get_context_size(void)
|
||
|
|
{
|
||
|
|
return (sizeof(diva_um_idi_os_context_t));
|
||
|
|
}
|
||
|
|
|
||
|
|
void diva_os_wakeup_read(void *os_context)
|
||
|
|
{
|
||
|
|
diva_um_idi_os_context_t *p_os =
|
||
|
|
(diva_um_idi_os_context_t *) os_context;
|
||
|
|
wake_up_interruptible(&p_os->read_wait);
|
||
|
|
}
|
||
|
|
|
||
|
|
void diva_os_wakeup_close(void *os_context)
|
||
|
|
{
|
||
|
|
diva_um_idi_os_context_t *p_os =
|
||
|
|
(diva_um_idi_os_context_t *) os_context;
|
||
|
|
wake_up_interruptible(&p_os->close_wait);
|
||
|
|
}
|
||
|
|
|
||
|
|
static
|
||
|
|
void diva_um_timer_function(struct timer_list *t)
|
||
|
|
{
|
||
|
|
diva_um_idi_os_context_t *p_os = from_timer(p_os, t, diva_timer_id);
|
||
|
|
|
||
|
|
p_os->aborted = 1;
|
||
|
|
wake_up_interruptible(&p_os->read_wait);
|
||
|
|
wake_up_interruptible(&p_os->close_wait);
|
||
|
|
DBG_ERR(("entity removal watchdog"))
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
** If application exits without entity removal this function will remove
|
||
|
|
** entity and block until removal is complete
|
||
|
|
*/
|
||
|
|
static int remove_entity(void *entity)
|
||
|
|
{
|
||
|
|
struct task_struct *curtask = current;
|
||
|
|
diva_um_idi_os_context_t *p_os;
|
||
|
|
|
||
|
|
diva_um_idi_stop_wdog(entity);
|
||
|
|
|
||
|
|
if (!entity) {
|
||
|
|
DBG_FTL(("Zero entity on remove"))
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!(p_os =
|
||
|
|
(diva_um_idi_os_context_t *)
|
||
|
|
diva_um_id_get_os_context(entity))) {
|
||
|
|
DBG_FTL(("Zero entity os context on remove"))
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!divas_um_idi_entity_assigned(entity) || p_os->aborted) {
|
||
|
|
/*
|
||
|
|
Entity is not assigned, also can be removed
|
||
|
|
*/
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
DBG_TRC(("E(%08x) check remove", entity))
|
||
|
|
|
||
|
|
/*
|
||
|
|
If adapter not answers on remove request inside of
|
||
|
|
10 Sec, then adapter is dead
|
||
|
|
*/
|
||
|
|
diva_um_idi_start_wdog(entity);
|
||
|
|
|
||
|
|
{
|
||
|
|
DECLARE_WAITQUEUE(wait, curtask);
|
||
|
|
|
||
|
|
add_wait_queue(&p_os->close_wait, &wait);
|
||
|
|
for (;;) {
|
||
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
||
|
|
if (!divas_um_idi_entity_start_remove(entity)
|
||
|
|
|| p_os->aborted) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
schedule();
|
||
|
|
}
|
||
|
|
set_current_state(TASK_RUNNING);
|
||
|
|
remove_wait_queue(&p_os->close_wait, &wait);
|
||
|
|
}
|
||
|
|
|
||
|
|
DBG_TRC(("E(%08x) start remove", entity))
|
||
|
|
{
|
||
|
|
DECLARE_WAITQUEUE(wait, curtask);
|
||
|
|
|
||
|
|
add_wait_queue(&p_os->close_wait, &wait);
|
||
|
|
for (;;) {
|
||
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
||
|
|
if (!divas_um_idi_entity_assigned(entity)
|
||
|
|
|| p_os->aborted) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
schedule();
|
||
|
|
}
|
||
|
|
set_current_state(TASK_RUNNING);
|
||
|
|
remove_wait_queue(&p_os->close_wait, &wait);
|
||
|
|
}
|
||
|
|
|
||
|
|
DBG_TRC(("E(%08x) remove complete, aborted:%d", entity,
|
||
|
|
p_os->aborted))
|
||
|
|
|
||
|
|
diva_um_idi_stop_wdog(entity);
|
||
|
|
|
||
|
|
p_os->aborted = 0;
|
||
|
|
|
||
|
|
return (0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* timer watchdog
|
||
|
|
*/
|
||
|
|
void diva_um_idi_start_wdog(void *entity)
|
||
|
|
{
|
||
|
|
diva_um_idi_os_context_t *p_os;
|
||
|
|
|
||
|
|
if (entity &&
|
||
|
|
((p_os =
|
||
|
|
(diva_um_idi_os_context_t *)
|
||
|
|
diva_um_id_get_os_context(entity)))) {
|
||
|
|
mod_timer(&p_os->diva_timer_id, jiffies + 10 * HZ);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void diva_um_idi_stop_wdog(void *entity)
|
||
|
|
{
|
||
|
|
diva_um_idi_os_context_t *p_os;
|
||
|
|
|
||
|
|
if (entity &&
|
||
|
|
((p_os =
|
||
|
|
(diva_um_idi_os_context_t *)
|
||
|
|
diva_um_id_get_os_context(entity)))) {
|
||
|
|
del_timer(&p_os->diva_timer_id);
|
||
|
|
}
|
||
|
|
}
|