{
nvdimm_bus_lock(&nvdimm_bus->dev);
if (--nvdimm_bus->probe_active == 0)
- wake_up(&nvdimm_bus->probe_wait);
+ wake_up(&nvdimm_bus->wait);
nvdimm_bus_unlock(&nvdimm_bus->dev);
}
return NULL;
INIT_LIST_HEAD(&nvdimm_bus->list);
INIT_LIST_HEAD(&nvdimm_bus->mapping_list);
- init_waitqueue_head(&nvdimm_bus->probe_wait);
+ init_waitqueue_head(&nvdimm_bus->wait);
nvdimm_bus->id = ida_simple_get(&nd_ida, 0, 0, GFP_KERNEL);
if (nvdimm_bus->id < 0) {
kfree(nvdimm_bus);
list_del_init(&nvdimm_bus->list);
mutex_unlock(&nvdimm_bus_list_mutex);
+ wait_event(nvdimm_bus->wait,
+ atomic_read(&nvdimm_bus->ioctl_active) == 0);
+
nd_synchronize();
device_for_each_child(&nvdimm_bus->dev, NULL, child_unregister);
if (nvdimm_bus->probe_active == 0)
break;
nvdimm_bus_unlock(&nvdimm_bus->dev);
- wait_event(nvdimm_bus->probe_wait,
+ wait_event(nvdimm_bus->wait,
nvdimm_bus->probe_active == 0);
nvdimm_bus_lock(&nvdimm_bus->dev);
} while (true);
return rc;
}
-static long nd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
- long id = (long) file->private_data;
- int rc = -ENXIO, ro;
- struct nvdimm_bus *nvdimm_bus;
-
- ro = ((file->f_flags & O_ACCMODE) == O_RDONLY);
- mutex_lock(&nvdimm_bus_list_mutex);
- list_for_each_entry(nvdimm_bus, &nvdimm_bus_list, list) {
- if (nvdimm_bus->id == id) {
- rc = __nd_ioctl(nvdimm_bus, NULL, ro, cmd, arg);
- break;
- }
- }
- mutex_unlock(&nvdimm_bus_list_mutex);
-
- return rc;
-}
+enum nd_ioctl_mode {
+ BUS_IOCTL,
+ DIMM_IOCTL,
+};
static int match_dimm(struct device *dev, void *data)
{
return 0;
}
-static long nvdimm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+static long nd_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
+ enum nd_ioctl_mode mode)
+
{
- int rc = -ENXIO, ro;
- struct nvdimm_bus *nvdimm_bus;
+ struct nvdimm_bus *nvdimm_bus, *found = NULL;
+ long id = (long) file->private_data;
+ struct nvdimm *nvdimm = NULL;
+ int rc, ro;
ro = ((file->f_flags & O_ACCMODE) == O_RDONLY);
mutex_lock(&nvdimm_bus_list_mutex);
list_for_each_entry(nvdimm_bus, &nvdimm_bus_list, list) {
- struct device *dev = device_find_child(&nvdimm_bus->dev,
- file->private_data, match_dimm);
- struct nvdimm *nvdimm;
-
- if (!dev)
- continue;
+ if (mode == DIMM_IOCTL) {
+ struct device *dev;
+
+ dev = device_find_child(&nvdimm_bus->dev,
+ file->private_data, match_dimm);
+ if (!dev)
+ continue;
+ nvdimm = to_nvdimm(dev);
+ found = nvdimm_bus;
+ } else if (nvdimm_bus->id == id) {
+ found = nvdimm_bus;
+ }
- nvdimm = to_nvdimm(dev);
- rc = __nd_ioctl(nvdimm_bus, nvdimm, ro, cmd, arg);
- put_device(dev);
- break;
+ if (found) {
+ atomic_inc(&nvdimm_bus->ioctl_active);
+ break;
+ }
}
mutex_unlock(&nvdimm_bus_list_mutex);
+ if (!found)
+ return -ENXIO;
+
+ nvdimm_bus = found;
+ rc = __nd_ioctl(nvdimm_bus, nvdimm, ro, cmd, arg);
+
+ if (nvdimm)
+ put_device(&nvdimm->dev);
+ if (atomic_dec_and_test(&nvdimm_bus->ioctl_active))
+ wake_up(&nvdimm_bus->wait);
+
return rc;
}
+static long bus_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ return nd_ioctl(file, cmd, arg, BUS_IOCTL);
+}
+
+static long dimm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ return nd_ioctl(file, cmd, arg, DIMM_IOCTL);
+}
+
static int nd_open(struct inode *inode, struct file *file)
{
long minor = iminor(inode);
static const struct file_operations nvdimm_bus_fops = {
.owner = THIS_MODULE,
.open = nd_open,
- .unlocked_ioctl = nd_ioctl,
- .compat_ioctl = nd_ioctl,
+ .unlocked_ioctl = bus_ioctl,
+ .compat_ioctl = bus_ioctl,
.llseek = noop_llseek,
};
static const struct file_operations nvdimm_fops = {
.owner = THIS_MODULE,
.open = nd_open,
- .unlocked_ioctl = nvdimm_ioctl,
- .compat_ioctl = nvdimm_ioctl,
+ .unlocked_ioctl = dimm_ioctl,
+ .compat_ioctl = dimm_ioctl,
.llseek = noop_llseek,
};