Commit d4a06a8b authored by Alexander Viro's avatar Alexander Viro Committed by Linus Torvalds

[PATCH] i2c cleanup

	switched to devfs_remove(), killed gratitious devfs_handle_t array,
	cleaned up the failure exit path in init().
parent 24cade1f
......@@ -37,9 +37,7 @@
#include <linux/slab.h>
#include <linux/version.h>
#include <linux/smp_lock.h>
#ifdef CONFIG_DEVFS_FS
#include <linux/devfs_fs_kernel.h>
#endif
/* If you want debugging uncomment: */
......@@ -80,10 +78,6 @@ static struct file_operations i2cdev_fops = {
#define I2CDEV_ADAPS_MAX I2C_ADAP_MAX
static struct i2c_adapter *i2cdev_adaps[I2CDEV_ADAPS_MAX];
#ifdef CONFIG_DEVFS_FS
static devfs_handle_t devfs_i2c[I2CDEV_ADAPS_MAX];
static devfs_handle_t devfs_handle = NULL;
#endif
static struct i2c_driver i2cdev_driver = {
.name = "i2c-dev dummy driver",
......@@ -101,8 +95,6 @@ static struct i2c_client i2cdev_client_template = {
.driver = &i2cdev_driver,
};
static int i2cdev_initialized;
static ssize_t i2cdev_read (struct file *file, char *buf, size_t count,
loff_t *offset)
{
......@@ -399,7 +391,7 @@ static int i2cdev_release (struct inode *inode, struct file *file)
int i2cdev_attach_adapter(struct i2c_adapter *adap)
{
int i;
char name[8];
char name[12];
if ((i = i2c_adapter_id(adap)) < 0) {
printk(KERN_DEBUG "i2c-dev.o: Unknown adapter ?!?\n");
......@@ -410,21 +402,17 @@ int i2cdev_attach_adapter(struct i2c_adapter *adap)
return -ENODEV;
}
sprintf (name, "%d", i);
sprintf (name, "i2c/%d", i);
if (! i2cdev_adaps[i]) {
i2cdev_adaps[i] = adap;
#ifdef CONFIG_DEVFS_FS
devfs_i2c[i] = devfs_register (devfs_handle, name,
devfs_register (NULL, name,
DEVFS_FL_DEFAULT, I2C_MAJOR, i,
S_IFCHR | S_IRUSR | S_IWUSR,
&i2cdev_fops, NULL);
#endif
printk(KERN_DEBUG "i2c-dev.o: Registered '%s' as minor %d\n",adap->name,i);
} else {
/* This is actually a detach_adapter call! */
#ifdef CONFIG_DEVFS_FS
devfs_unregister(devfs_i2c[i]);
#endif
devfs_remove("i2c/%d", i);
i2cdev_adaps[i] = NULL;
#ifdef DEBUG
printk(KERN_DEBUG "i2c-dev.o: Adapter unregistered: %s\n",adap->name);
......@@ -449,24 +437,13 @@ static void i2cdev_cleanup(void)
{
int res;
if (i2cdev_initialized >= 2) {
if ((res = i2c_del_driver(&i2cdev_driver))) {
printk(KERN_ERR "i2c-dev.o: Driver deregistration failed, "
"module not removed.\n");
}
i2cdev_initialized --;
}
if (i2cdev_initialized >= 1) {
#ifdef CONFIG_DEVFS_FS
devfs_unregister(devfs_handle);
#endif
if ((res = unregister_chrdev(I2C_MAJOR,"i2c"))) {
printk(KERN_ERR "i2c-dev.o: unable to release major %d for i2c bus\n",
I2C_MAJOR);
}
i2cdev_initialized --;
}
devfs_remove("i2c");
unregister_chrdev(I2C_MAJOR,"i2c");
}
int __init i2c_dev_init(void)
......@@ -475,23 +452,18 @@ int __init i2c_dev_init(void)
printk(KERN_INFO "i2c-dev.o: i2c /dev entries driver module version %s (%s)\n", I2C_VERSION, I2C_DATE);
i2cdev_initialized = 0;
if (register_chrdev(I2C_MAJOR,"i2c",&i2cdev_fops)) {
printk(KERN_ERR "i2c-dev.o: unable to get major %d for i2c bus\n",
I2C_MAJOR);
return -EIO;
}
#ifdef CONFIG_DEVFS_FS
devfs_handle = devfs_mk_dir(NULL, "i2c", NULL);
#endif
i2cdev_initialized ++;
devfs_mk_dir(NULL, "i2c", NULL);
if ((res = i2c_add_driver(&i2cdev_driver))) {
printk(KERN_ERR "i2c-dev.o: Driver registration failed, module not inserted.\n");
i2cdev_cleanup();
devfs_remove("i2c");
unregister_chrdev(I2C_MAJOR,"i2c");
return res;
}
i2cdev_initialized ++;
return 0;
}
......
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