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dahdi: sysfs: chrdev region (not usefull yet)

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Signed-off-by: Oron Peled <oron.peled@xorcom.com>
This commit is contained in:
Oron Peled 2012-10-14 16:20:47 +02:00 committed by Tzafrir Cohen
parent 53219879c8
commit 3a94ac322d
1 changed files with 32 additions and 0 deletions
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32
drivers/dahdi/dahdi-sysfs-chan.c
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@ -38,6 +38,8 @@
static struct class *dahdi_class;
static dev_t dahdi_channels_devt; /*!< Device number of first channel */
static struct cdev dahdi_channels_cdev; /*!< Channels chardev's */
/*
* Flags to remember what initializations already
@ -46,6 +48,7 @@ static struct class *dahdi_class;
static struct {
int channel_driver:1;
int channels_bus:1;
int cdev:1;
} should_cleanup;
static struct device_attribute chan_dev_attrs[] = {
@ -247,6 +250,17 @@ cleanup:
*/
static void sysfs_channels_cleanup(void)
{
if (should_cleanup.cdev) {
dahdi_dbg(DEVICES, "removing channels cdev\n");
cdev_del(&dahdi_channels_cdev);
should_cleanup.cdev = 0;
}
if (dahdi_channels_devt) {
dahdi_dbg(DEVICES, "unregistering chrdev_region\n");
unregister_chrdev_region(dahdi_channels_devt,
DAHDI_MAX_CHANNELS);
}
fixed_devfiles_remove();
if (dahdi_class) {
dahdi_dbg(DEVICES, "Destroying DAHDI class:\n");
@ -297,6 +311,24 @@ int __init dahdi_sysfs_chan_init(const struct file_operations *fops)
res = fixed_devfiles_create();
if (res)
goto cleanup;
dahdi_dbg(DEVICES, "allocating chrdev_region\n");
res = alloc_chrdev_region(&dahdi_channels_devt,
0,
DAHDI_MAX_CHANNELS,
"dahdi_channels");
if (res) {
dahdi_err("%s: Failed allocating chrdev for %d channels (%d)",
__func__, DAHDI_MAX_CHANNELS, res);
goto cleanup;
}
dahdi_dbg(DEVICES, "adding channels cdev\n");
res = cdev_add(&dahdi_channels_cdev, dahdi_channels_devt,
DAHDI_MAX_CHANNELS);
if (res) {
dahdi_err("%s: cdev_add() failed (%d)", __func__, res);
goto cleanup;
}
should_cleanup.cdev = 1;
return 0;
cleanup:
sysfs_channels_cleanup();