firewire: Make use of struct device_type.
The device_type struct is useful for setting attributes for a device and overriding .release and .uevent for a group of devices. This patch uses it this way to clean up the sysfs code a bit. Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Kristian Høgsberg
Stefan Richter
Родитель
945ac22253
Коммит
21351dbe4e
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@ -138,9 +138,6 @@ fw_unit_uevent(struct device *dev, char **envp, int num_envp,
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int length = 0;
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int i = 0;
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if (!is_fw_unit(dev))
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goto out;
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get_modalias(unit, modalias, sizeof modalias);
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if (add_uevent_var(envp, num_envp, &i,
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@ -148,7 +145,6 @@ fw_unit_uevent(struct device *dev, char **envp, int num_envp,
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"MODALIAS=%s", modalias))
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return -ENOMEM;
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out:
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envp[i] = NULL;
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return 0;
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@ -157,7 +153,6 @@ fw_unit_uevent(struct device *dev, char **envp, int num_envp,
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struct bus_type fw_bus_type = {
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.name = "firewire",
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.match = fw_unit_match,
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.uevent = fw_unit_uevent,
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};
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EXPORT_SYMBOL(fw_bus_type);
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@ -199,8 +194,8 @@ int fw_device_enable_phys_dma(struct fw_device *device)
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EXPORT_SYMBOL(fw_device_enable_phys_dma);
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static ssize_t
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show_modalias_attribute(struct device *dev,
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struct device_attribute *attr, char *buf)
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modalias_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct fw_unit *unit = fw_unit(dev);
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int length;
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@ -211,30 +206,9 @@ show_modalias_attribute(struct device *dev,
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return length + 1;
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}
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static struct device_attribute modalias_attribute = {
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.attr = { .name = "modalias", .mode = S_IRUGO, },
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.show = show_modalias_attribute,
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};
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static ssize_t
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show_config_rom_attribute(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct fw_device *device = fw_device(dev);
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memcpy(buf, device->config_rom, device->config_rom_length * 4);
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return device->config_rom_length * 4;
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}
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static struct device_attribute config_rom_attribute = {
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.attr = {.name = "config_rom", .mode = S_IRUGO,},
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.show = show_config_rom_attribute,
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};
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static ssize_t
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show_rom_index_attribute(struct device *dev,
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struct device_attribute *attr, char *buf)
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rom_index_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct fw_device *device = fw_device(dev->parent);
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struct fw_unit *unit = fw_unit(dev);
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@ -243,9 +217,26 @@ show_rom_index_attribute(struct device *dev,
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(int)(unit->directory - device->config_rom));
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}
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static struct device_attribute rom_index_attribute = {
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.attr = { .name = "rom_index", .mode = S_IRUGO, },
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.show = show_rom_index_attribute,
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static struct device_attribute fw_unit_attributes[] = {
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__ATTR_RO(modalias),
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__ATTR_RO(rom_index),
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__ATTR_NULL,
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};
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static ssize_t
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config_rom_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct fw_device *device = fw_device(dev);
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memcpy(buf, device->config_rom, device->config_rom_length * 4);
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return device->config_rom_length * 4;
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}
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static struct device_attribute fw_device_attributes[] = {
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__ATTR_RO(config_rom),
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__ATTR_NULL,
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};
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struct read_quadlet_callback_data {
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@ -370,9 +361,15 @@ static void fw_unit_release(struct device *dev)
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kfree(unit);
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}
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static struct device_type fw_unit_type = {
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.attrs = fw_unit_attributes,
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.uevent = fw_unit_uevent,
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.release = fw_unit_release,
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};
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static int is_fw_unit(struct device *dev)
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{
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return dev->release == fw_unit_release;
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return dev->type == &fw_unit_type;
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}
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static void create_units(struct fw_device *device)
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@ -397,7 +394,7 @@ static void create_units(struct fw_device *device)
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unit->directory = ci.p + value - 1;
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unit->device.bus = &fw_bus_type;
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unit->device.release = fw_unit_release;
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unit->device.type = &fw_unit_type;
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unit->device.parent = &device->device;
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snprintf(unit->device.bus_id, sizeof unit->device.bus_id,
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"%s.%d", device->device.bus_id, i++);
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@ -406,27 +403,12 @@ static void create_units(struct fw_device *device)
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kfree(unit);
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continue;
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}
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if (device_create_file(&unit->device, &modalias_attribute) < 0) {
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device_unregister(&unit->device);
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kfree(unit);
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}
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if (device_create_file(&unit->device, &rom_index_attribute) < 0) {
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device_unregister(&unit->device);
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kfree(unit);
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}
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}
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}
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static int shutdown_unit(struct device *device, void *data)
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{
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struct fw_unit *unit = fw_unit(device);
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if (is_fw_unit(device)) {
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device_remove_file(&unit->device, &modalias_attribute);
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device_unregister(&unit->device);
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}
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device_unregister(device);
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return 0;
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}
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@ -456,11 +438,15 @@ static void fw_device_shutdown(struct work_struct *work)
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up_write(&fw_bus_type.subsys.rwsem);
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fw_device_cdev_remove(device);
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device_remove_file(&device->device, &config_rom_attribute);
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device_for_each_child(&device->device, NULL, shutdown_unit);
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device_unregister(&device->device);
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}
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static struct device_type fw_device_type = {
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.attrs = fw_device_attributes,
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.release = fw_device_release,
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};
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/* These defines control the retry behavior for reading the config
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* rom. It shouldn't be necessary to tweak these; if the device
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* doesn't respond to a config rom read within 10 seconds, it's not
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@ -507,7 +493,7 @@ static void fw_device_init(struct work_struct *work)
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goto error;
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device->device.bus = &fw_bus_type;
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device->device.release = fw_device_release;
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device->device.type = &fw_device_type;
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device->device.parent = device->card->device;
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device->device.devt = MKDEV(fw_cdev_major, minor);
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snprintf(device->device.bus_id, sizeof device->device.bus_id,
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@ -518,11 +504,6 @@ static void fw_device_init(struct work_struct *work)
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goto error_with_cdev;
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}
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if (device_create_file(&device->device, &config_rom_attribute) < 0) {
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fw_error("Failed to create config rom file.\n");
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goto error_with_device;
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}
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create_units(device);
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/* Transition the device to running state. If it got pulled
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@ -549,8 +530,6 @@ static void fw_device_init(struct work_struct *work)
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return;
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error_with_device:
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device_del(&device->device);
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error_with_cdev:
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down_write(&fw_bus_type.subsys.rwsem);
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idr_remove(&fw_device_idr, minor);
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