static int mon_text_open(struct inode *inode, struct file *file)
{
struct mon_bus *mbus;
struct usb_bus *ubus;
struct mon_reader_text *rp;
int rc;
down(&mon_lock);
mbus = inode->u.generic_ip;
ubus = mbus->u_bus;
rp = kmalloc(sizeof(struct mon_reader_text), GFP_KERNEL);
if (rp == NULL) {
rc = -ENOMEM;
goto err_alloc;
}
memset(rp, 0, sizeof(struct mon_reader_text));
INIT_LIST_HEAD(&rp->e_list);
init_waitqueue_head(&rp->wait);
init_MUTEX(&rp->printf_lock);
rp->printf_size = PRINTF_DFL;
rp->printf_buf = kmalloc(rp->printf_size, GFP_KERNEL);
if (rp->printf_buf == NULL) {
rc = -ENOMEM;
goto err_alloc_pr;
}
rp->r.m_bus = mbus;
rp->r.r_data = rp;
rp->r.rnf_submit = mon_text_submit;
rp->r.rnf_complete = mon_text_complete;
snprintf(rp->slab_name, SLAB_NAME_SZ, "mon%dt_%lx", ubus->busnum,
(long)rp);
rp->e_slab = kmem_cache_create(rp->slab_name,
sizeof(struct mon_event_text), sizeof(long), 0,
mon_text_ctor, mon_text_dtor);
if (rp->e_slab == NULL) {
rc = -ENOMEM;
goto err_slab;
}
mon_reader_add(mbus, &rp->r);
file->private_data = rp;
up(&mon_lock);
return 0;
// err_busy:
// kmem_cache_destroy(rp->e_slab);
err_slab:
kfree(rp->printf_buf);
err_alloc_pr:
kfree(rp);
err_alloc:
up(&mon_lock);
return rc;
}
static int mon_text_open(struct inode *inode, struct file *file)
{
struct mon_bus *mbus;
struct mon_reader_text *rp;
int rc;
mutex_lock(&mon_lock);
mbus = inode->i_private;
rp = kzalloc(sizeof(struct mon_reader_text), GFP_KERNEL);
if (rp == NULL) {
rc = -ENOMEM;
goto err_alloc;
}
INIT_LIST_HEAD(&rp->e_list);
init_waitqueue_head(&rp->wait);
mutex_init(&rp->printf_lock);
rp->printf_size = PRINTF_DFL;
rp->printf_buf = kmalloc(rp->printf_size, GFP_KERNEL);
if (rp->printf_buf == NULL) {
rc = -ENOMEM;
goto err_alloc_pr;
}
rp->r.m_bus = mbus;
rp->r.r_data = rp;
rp->r.rnf_submit = mon_text_submit;
rp->r.rnf_error = mon_text_error;
rp->r.rnf_complete = mon_text_complete;
snprintf(rp->slab_name, SLAB_NAME_SZ, "mon_text_%p", rp);
rp->e_slab = kmem_cache_create(rp->slab_name,
sizeof(struct mon_event_text), sizeof(long), 0,
mon_text_ctor);
if (rp->e_slab == NULL) {
rc = -ENOMEM;
goto err_slab;
}
mon_reader_add(mbus, &rp->r);
file->private_data = rp;
mutex_unlock(&mon_lock);
return 0;
// err_busy:
// kmem_cache_destroy(rp->e_slab);
err_slab:
kfree(rp->printf_buf);
err_alloc_pr:
kfree(rp);
err_alloc:
mutex_unlock(&mon_lock);
return rc;
}
