static void brcmf_fw_request_code_done(const struct firmware *fw, void *ctx)
{
struct brcmf_fw *fwctx = ctx;
int ret;
brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(fwctx->dev));
if (!fw)
goto fail;
/* only requested code so done here */
if (!(fwctx->flags & BRCMF_FW_REQUEST_NVRAM)) {
fwctx->done(fwctx->dev, fw, NULL, 0);
kfree(fwctx);
return;
}
fwctx->code = fw;
ret = request_firmware_nowait(THIS_MODULE, true, fwctx->nvram_name,
fwctx->dev, GFP_KERNEL, fwctx,
brcmf_fw_request_nvram_done);
if (!ret)
return;
brcmf_fw_request_nvram_done(NULL, fwctx);
return;
fail:
brcmf_dbg(TRACE, "failed: dev=%s\n", dev_name(fwctx->dev));
device_release_driver(fwctx->dev);
kfree(fwctx);
}
static void ar9170_usb_firmware_failed(struct ar9170_usb *aru)
{
struct device *parent = aru->udev->dev.parent;
struct usb_device *udev;
/*
* Store a copy of the usb_device pointer locally.
* This is because device_release_driver initiates
* ar9170_usb_disconnect, which in turn frees our
* driver context (aru).
*/
udev = aru->udev;
complete(&aru->firmware_loading_complete);
/* unbind anything failed */
if (parent)
down(&parent->sem);
device_release_driver(&udev->dev);
if (parent)
up(&parent->sem);
usb_put_dev(udev);
}
/**
* bus_remove_device - remove device from bus
* @dev: device to be removed
*
* - Remove device from all interfaces.
* - Remove symlink from bus' directory.
* - Delete device from bus's list.
* - Detach from its driver.
* - Drop reference taken in bus_add_device().
*/
void bus_remove_device(struct device *dev)
{
struct bus_type *bus = dev->bus;
struct subsys_interface *sif;
if (!bus)
return;
mutex_lock(&bus->p->mutex);
list_for_each_entry(sif, &bus->p->interfaces, node)
if (sif->remove_dev)
sif->remove_dev(dev, sif);
mutex_unlock(&bus->p->mutex);
sysfs_remove_link(&dev->kobj, "subsystem");
sysfs_remove_link(&dev->bus->p->devices_kset->kobj,
dev_name(dev));
device_remove_attrs(dev->bus, dev);
if (klist_node_attached(&dev->p->knode_bus))
klist_del(&dev->p->knode_bus);
pr_debug("bus: '%s': remove device %s\n",
dev->bus->name, dev_name(dev));
device_release_driver(dev);
bus_put(dev->bus);
}
static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
{
struct device *dev = &drive->gendev;
int ret = 1;
int err;
device_release_driver(dev);
/* FIXME: device can still be in use by previous driver */
strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
err = device_attach(dev);
if (err < 0)
printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
__func__, err);
drive->driver_req[0] = 0;
if (dev->driver == NULL) {
err = device_attach(dev);
if (err < 0)
printk(KERN_WARNING
"IDE: %s: device_attach(2) error: %d\n",
__func__, err);
}
if (dev->driver && !strcmp(dev->driver->name, driver))
ret = 0;
return ret;
}
static void brcmf_pcie_setup(struct device *dev, const struct firmware *fw,
void *nvram, u32 nvram_len)
{
struct brcmf_bus *bus = dev_get_drvdata(dev);
struct brcmf_pciedev *pcie_bus_dev = bus->bus_priv.pcie;
struct brcmf_pciedev_info *devinfo = pcie_bus_dev->devinfo;
struct brcmf_commonring **flowrings;
int ret;
u32 i;
brcmf_pcie_attach(devinfo);
ret = brcmf_pcie_download_fw_nvram(devinfo, fw, nvram, nvram_len);
if (ret)
goto fail;
devinfo->state = BRCMFMAC_PCIE_STATE_UP;
ret = brcmf_pcie_init_ringbuffers(devinfo);
if (ret)
goto fail;
ret = brcmf_pcie_init_scratchbuffers(devinfo);
if (ret)
goto fail;
brcmf_pcie_select_core(devinfo, BCMA_CORE_PCIE2);
ret = brcmf_pcie_request_irq(devinfo);
if (ret)
goto fail;
/* hook the commonrings in the bus structure. */
for (i = 0; i < BRCMF_NROF_COMMON_MSGRINGS; i++)
bus->msgbuf->commonrings[i] =
&devinfo->shared.commonrings[i]->commonring;
flowrings = kcalloc(devinfo->shared.nrof_flowrings, sizeof(flowrings),
GFP_KERNEL);
if (!flowrings)
goto fail;
for (i = 0; i < devinfo->shared.nrof_flowrings; i++)
flowrings[i] = &devinfo->shared.flowrings[i].commonring;
bus->msgbuf->flowrings = flowrings;
bus->msgbuf->rx_dataoffset = devinfo->shared.rx_dataoffset;
bus->msgbuf->max_rxbufpost = devinfo->shared.max_rxbufpost;
bus->msgbuf->nrof_flowrings = devinfo->shared.nrof_flowrings;
init_waitqueue_head(&devinfo->mbdata_resp_wait);
brcmf_pcie_intr_enable(devinfo);
if (brcmf_pcie_attach_bus(bus->dev) == 0)
return;
brcmf_pcie_bus_console_read(devinfo);
fail:
device_release_driver(dev);
}
static void carl9170_usb_firmware_failed(struct ar9170 *ar)
{
struct device *parent = ar->udev->dev.parent;
struct usb_device *udev;
/*
* Store a copy of the usb_device pointer locally.
* This is because device_release_driver initiates
* carl9170_usb_disconnect, which in turn frees our
* driver context (ar).
*/
udev = ar->udev;
complete(&ar->fw_load_wait);
/* unbind anything failed */
if (parent)
device_lock(parent);
device_release_driver(&udev->dev);
if (parent)
device_unlock(parent);
usb_put_dev(udev);
}
/**
* device_reprobe - remove driver for a device and probe for a new driver
* @dev: the device to reprobe
*
* This function detaches the attached driver (if any) for the given
* device and restarts the driver probing process. It is intended
* to use if probing criteria changed during a devices lifetime and
* driver attachment should change accordingly.
*/
int device_reprobe(struct device *dev)
{
if (dev->driver) {
if (dev->parent) /* Needed for USB */
down(&dev->parent->sem);
device_release_driver(dev);
if (dev->parent)
up(&dev->parent->sem);
}
return bus_rescan_devices_helper(dev, NULL);
}
/**
* device_reprobe - remove driver for a device and probe for a new driver
* @dev: the device to reprobe
*
* This function detaches the attached driver (if any) for the given
* device and restarts the driver probing process. It is intended
* to use if probing criteria changed during a devices lifetime and
* driver attachment should change accordingly.
*/
int device_reprobe(struct device *dev)
{
if (dev->driver) {
if (dev->parent) /* Needed for USB */
device_lock(dev->parent);
device_release_driver(dev);
if (dev->parent)
device_unlock(dev->parent);
}
return bus_rescan_devices_helper(dev, NULL);
}
/**
* phy_detach - detach a PHY device from its network device
* @phydev: target phy_device struct
*/
void phy_detach(struct phy_device *phydev)
{
phydev->attached_dev = NULL;
/* If the device had no specific driver before (i.e. - it
* was using the generic driver), we unbind the device
* from the generic driver so that there's a chance a
* real driver could be loaded */
if (phydev->dev.driver == &genphy_driver.driver)
device_release_driver(&phydev->dev);
}
/** called when module unloaded */
static void __exit mod_exit(void) {
lpc313x_deinit_adc();
device_release_driver(driv_dev);
device_destroy(driv_class,driv_number);
class_destroy(driv_class);
cdev_del(driv_object);
unregister_chrdev_region(driv_number,1);
dev_info(driv_dev, "[lpc313x_adc] driver unloaded\n");
}
/**
* bus_remove_device - remove device from bus
* @dev: device to be removed
*
* - Remove symlink from bus's directory.
* - Delete device from bus's list.
* - Detach from its driver.
* - Drop reference taken in bus_add_device().
*/
void bus_remove_device(struct device * dev)
{
if (dev->bus) {
sysfs_remove_link(&dev->kobj, "bus");
sysfs_remove_link(&dev->bus->devices.kobj, dev->bus_id);
device_remove_attrs(dev->bus, dev);
klist_remove(&dev->knode_bus);
pr_debug("bus %s: remove device %s\n", dev->bus->name, dev->bus_id);
device_release_driver(dev);
put_bus(dev->bus);
}
}
static void p54p_firmware_step2(const struct firmware *fw,
void *context)
{
struct p54p_priv *priv = context;
struct ieee80211_hw *dev = priv->common.hw;
struct pci_dev *pdev = priv->pdev;
int err;
if (!fw) {
dev_err(&pdev->dev, "Cannot find firmware (isl3886pci)\n");
err = -ENOENT;
goto out;
}
priv->firmware = fw;
err = p54p_open(dev);
if (err)
goto out;
err = p54_read_eeprom(dev);
p54p_stop(dev);
if (err)
goto out;
err = p54_register_common(dev, &pdev->dev);
if (err)
goto out;
out:
complete(&priv->fw_loaded);
if (err) {
struct device *parent = pdev->dev.parent;
if (parent)
device_lock(parent);
/*
* This will indirectly result in a call to p54p_remove.
* Hence, we don't need to bother with freeing any
* allocated ressources at all.
*/
device_release_driver(&pdev->dev);
if (parent)
device_unlock(parent);
}
pci_dev_put(pdev);
}
static void pci_stop_dev(struct pci_dev *dev)
{
pci_pme_active(dev, false);
if (dev->is_added) {
pci_proc_detach_device(dev);
pci_remove_sysfs_dev_files(dev);
device_release_driver(&dev->dev);
dev->is_added = 0;
}
if (dev->bus->self)
pcie_aspm_exit_link_state(dev);
}
static int umc_bus_pre_reset_helper(struct device *dev, void *data)
{
int ret = 0;
if (dev->driver) {
struct umc_dev *umc = to_umc_dev(dev);
struct umc_driver *umc_drv = to_umc_driver(dev->driver);
if (umc_drv->pre_reset)
ret = umc_drv->pre_reset(umc);
else
device_release_driver(dev);
}
return ret;
}
static void ar9170_usb_firmware_failed(struct ar9170_usb *aru)
{
struct device *parent = aru->udev->dev.parent;
complete(&aru->firmware_loading_complete);
/* unbind anything failed */
if (parent)
device_lock(parent);
device_release_driver(&aru->udev->dev);
if (parent)
device_unlock(parent);
usb_put_dev(aru->udev);
}
void pci_stop_root_bus(struct pci_bus *bus)
{
struct pci_dev *child, *tmp;
struct pci_host_bridge *host_bridge;
if (!pci_is_root_bus(bus))
return;
host_bridge = to_pci_host_bridge(bus->bridge);
list_for_each_entry_safe_reverse(child, tmp,
&bus->devices, bus_list)
pci_stop_bus_device(child);
/* stop the host bridge */
device_release_driver(&host_bridge->dev);
}
/**
* bus_remove_device - remove device from bus
* @dev: device to be removed
*
* - Remove symlink from bus's directory.
* - Delete device from bus's list.
* - Detach from its driver.
* - Drop reference taken in bus_add_device().
*/
void bus_remove_device(struct device * dev)
{
if (dev->bus) {
sysfs_remove_link(&dev->kobj, "subsystem");
remove_deprecated_bus_links(dev);
sysfs_remove_link(&dev->bus->devices.kobj, dev->bus_id);
device_remove_attrs(dev->bus, dev);
if (dev->is_registered) {
dev->is_registered = 0;
klist_del(&dev->knode_bus);
}
pr_debug("bus %s: remove device %s\n", dev->bus->name, dev->bus_id);
device_release_driver(dev);
put_bus(dev->bus);
}
}
/**
* bus_remove_device - remove device from bus
* @dev: device to be removed
*
* - Remove symlink from bus's directory.
* - Delete device from bus's list.
* - Detach from its driver.
* - Drop reference taken in bus_add_device().
*/
void bus_remove_device(struct device *dev)
{
if (dev->bus) {
sysfs_remove_link(&dev->kobj, "subsystem");
sysfs_remove_link(&dev->bus->p->devices_kset->kobj,
dev_name(dev));
device_remove_attrs(dev->bus, dev);
if (klist_node_attached(&dev->p->knode_bus))
klist_del(&dev->p->knode_bus);
pr_debug("bus: '%s': remove device %s\n",
dev->bus->name, dev_name(dev));
device_release_driver(dev);
bus_put(dev->bus);
}
}
static ssize_t driver_unbind(struct device_driver *drv,
const char *buf, size_t count)
{
struct bus_type *bus = get_bus(drv->bus);
struct device *dev;
int err = -ENODEV;
dev = bus_find_device(bus, NULL, (void *)buf, driver_helper);
if (dev && dev->driver == drv) {
device_release_driver(dev);
err = count;
}
put_device(dev);
put_bus(bus);
return err;
}
static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
{
struct device *dev = &drive->gendev;
int ret = 1;
down_write(&dev->bus->subsys.rwsem);
device_release_driver(dev);
/* FIXME: device can still be in use by previous driver */
strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
device_attach(dev);
drive->driver_req[0] = 0;
if (dev->driver == NULL)
device_attach(dev);
if (dev->driver && !strcmp(dev->driver->name, driver))
ret = 0;
up_write(&dev->bus->subsys.rwsem);
return ret;
}
static void brcmf_usb_probe_phase2(struct device *dev, int ret,
struct brcmf_fw_request *fwreq)
{
struct brcmf_bus *bus = dev_get_drvdata(dev);
struct brcmf_usbdev_info *devinfo = bus->bus_priv.usb->devinfo;
const struct firmware *fw;
if (ret)
goto error;
brcmf_dbg(USB, "Start fw downloading\n");
fw = fwreq->items[BRCMF_USB_FW_CODE].binary;
kfree(fwreq);
ret = check_file(fw->data);
if (ret < 0) {
brcmf_err("invalid firmware\n");
release_firmware(fw);
goto error;
}
devinfo->image = fw->data;
devinfo->image_len = fw->size;
ret = brcmf_usb_fw_download(devinfo);
release_firmware(fw);
if (ret)
goto error;
/* Attach to the common driver interface */
ret = brcmf_attach(devinfo->dev, devinfo->settings);
if (ret)
goto error;
complete(&devinfo->dev_init_done);
return;
error:
brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), ret);
complete(&devinfo->dev_init_done);
device_release_driver(dev);
}
static void acpi_processor_remove(struct acpi_device *device)
{
struct acpi_processor *pr;
if (!device || !acpi_driver_data(device))
return;
pr = acpi_driver_data(device);
if (pr->id >= nr_cpu_ids)
goto out;
/*
* The only reason why we ever get here is CPU hot-removal. The CPU is
* already offline and the ACPI device removal locking prevents it from
* being put back online at this point.
*
* Unbind the driver from the processor device and detach it from the
* ACPI companion object.
*/
device_release_driver(pr->dev);
acpi_unbind_one(pr->dev);
/* Clean up. */
per_cpu(processor_device_array, pr->id) = NULL;
per_cpu(processors, pr->id) = NULL;
cpu_maps_update_begin();
cpu_hotplug_begin();
/* Remove the CPU. */
arch_unregister_cpu(pr->id);
acpi_unmap_lsapic(pr->id);
cpu_hotplug_done();
cpu_maps_update_done();
try_offline_node(cpu_to_node(pr->id));
out:
free_cpumask_var(pr->throttling.shared_cpu_map);
kfree(pr);
}
static void brcmf_fw_request_nvram_done(const struct firmware *fw, void *ctx)
{
struct brcmf_fw *fwctx = ctx;
u32 nvram_length = 0;
void *nvram = NULL;
u8 *data = NULL;
size_t data_len;
bool raw_nvram;
brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(fwctx->dev));
if (fw && fw->data) {
data = (u8 *)fw->data;
data_len = fw->size;
raw_nvram = false;
} else {
data = bcm47xx_nvram_get_contents(&data_len);
if (!data && !(fwctx->flags & BRCMF_FW_REQ_NV_OPTIONAL))
goto fail;
raw_nvram = true;
}
if (data)
nvram = brcmf_fw_nvram_strip(data, data_len, &nvram_length,
fwctx->domain_nr, fwctx->bus_nr);
if (raw_nvram)
bcm47xx_nvram_release_contents(data);
if (fw)
release_firmware(fw);
if (!nvram && !(fwctx->flags & BRCMF_FW_REQ_NV_OPTIONAL))
goto fail;
fwctx->done(fwctx->dev, fwctx->code, nvram, nvram_length);
kfree(fwctx);
return;
fail:
brcmf_dbg(TRACE, "failed: dev=%s\n", dev_name(fwctx->dev));
release_firmware(fwctx->code);
device_release_driver(fwctx->dev);
kfree(fwctx);
}
/* Manually detach a device from its associated driver. */
static ssize_t driver_unbind(struct device_driver *drv,
const char *buf, size_t count)
{
struct bus_type *bus = bus_get(drv->bus);
struct device *dev;
int err = -ENODEV;
dev = bus_find_device_by_name(bus, NULL, buf);
if (dev && dev->driver == drv) {
if (dev->parent) /* Needed for USB */
device_lock(dev->parent);
device_release_driver(dev);
if (dev->parent)
device_unlock(dev->parent);
err = count;
}
put_device(dev);
bus_put(bus);
return err;
}
static ssize_t driver_unbind(struct device_driver *drv,
const char *buf, size_t count)
{
struct bus_type *bus = bus_get(drv->bus);
struct device *dev;
int err = -ENODEV;
dev = bus_find_device(bus, NULL, (void *)buf, driver_helper);
if (dev && dev->driver == drv) {
if (dev->parent) /* Needed for USB */
down(&dev->parent->sem);
device_release_driver(dev);
if (dev->parent)
up(&dev->parent->sem);
err = count;
}
put_device(dev);
bus_put(bus);
return err;
}
static void rtl_usb_unbind(struct ieee80211_hw *hw)
{
struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
struct device *parent = rtlusb->udev->dev.parent;
struct usb_device *udev;
/* Store a copy of the usb_device pointer locally.
* This is because device_release_driver initiates
* rtl_usb_disconnect, which in turn frees our
* driver context (rtl_priv).
*/
udev = rtlusb->udev;
/* unbind anything failed */
if (parent)
device_lock(parent);
device_release_driver(&udev->dev);
if (parent)
device_unlock(parent);
}
/**
* check_plugged_state_change - Check change in an MC object's plugged state
*
* @mc_dev: pointer to the fsl-mc device for a given MC object
* @obj_desc: pointer to the MC object's descriptor in the MC
*
* If the plugged state has changed from unplugged to plugged, the fsl-mc
* device is bound to the corresponding device driver.
* If the plugged state has changed from plugged to unplugged, the fsl-mc
* device is unbound from the corresponding device driver.
*/
static void check_plugged_state_change(struct fsl_mc_device *mc_dev,
struct dprc_obj_desc *obj_desc)
{
int error;
u32 plugged_flag_at_mc =
obj_desc->state & DPRC_OBJ_STATE_PLUGGED;
if (plugged_flag_at_mc !=
(mc_dev->obj_desc.state & DPRC_OBJ_STATE_PLUGGED)) {
if (plugged_flag_at_mc) {
mc_dev->obj_desc.state |= DPRC_OBJ_STATE_PLUGGED;
error = device_attach(&mc_dev->dev);
if (error < 0) {
dev_err(&mc_dev->dev,
"device_attach() failed: %d\n",
error);
}
} else {
mc_dev->obj_desc.state &= ~DPRC_OBJ_STATE_PLUGGED;
device_release_driver(&mc_dev->dev);
}
}
}
static void brcmf_usb_probe_phase2(struct device *dev,
const struct firmware *fw,
void *nvram, u32 nvlen)
{
struct brcmf_bus *bus = dev_get_drvdata(dev);
struct brcmf_usbdev_info *devinfo;
int ret;
brcmf_dbg(USB, "Start fw downloading\n");
devinfo = bus->bus_priv.usb->devinfo;
ret = check_file(fw->data);
if (ret < 0) {
brcmf_err("invalid firmware\n");
release_firmware(fw);
goto error;
}
devinfo->image = fw->data;
devinfo->image_len = fw->size;
ret = brcmf_usb_fw_download(devinfo);
release_firmware(fw);
if (ret)
goto error;
ret = brcmf_usb_bus_setup(devinfo);
if (ret)
goto error;
mutex_unlock(&devinfo->dev_init_lock);
return;
error:
brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), ret);
mutex_unlock(&devinfo->dev_init_lock);
device_release_driver(dev);
}
/**
* usb_driver_release_interface - unbind a driver from an interface
* @driver: the driver to be unbound
* @iface: the interface from which it will be unbound
*
* This can be used by drivers to release an interface without waiting
* for their disconnect() methods to be called. In typical cases this
* also causes the driver disconnect() method to be called.
*
* This call is synchronous, and may not be used in an interrupt context.
* Callers must own the device lock and the driver model's usb_bus_type.subsys
* writelock. So driver disconnect() entries don't need extra locking,
* but other call contexts may need to explicitly claim those locks.
*/
void usb_driver_release_interface(struct usb_driver *driver,
struct usb_interface *iface)
{
struct device *dev = &iface->dev;
/* this should never happen, don't release something that's not ours */
if (!dev->driver || dev->driver != &driver->driver)
return;
/* don't release from within disconnect() */
if (iface->condition != USB_INTERFACE_BOUND)
return;
/* don't release if the interface hasn't been added yet */
if (device_is_registered(dev)) {
iface->condition = USB_INTERFACE_UNBINDING;
device_release_driver(dev);
}
dev->driver = NULL;
usb_set_intfdata(iface, NULL);
iface->condition = USB_INTERFACE_UNBOUND;
mark_quiesced(iface);
}
static int intel_th_child_remove(struct device *dev, void *data)
{
device_release_driver(dev);
return 0;
}
