From: Jonathan Cameron <jic23@xxxxxxxxxx>
Starting point in boiler plate reduction similar to that done for
many similar cases elsewhere in the kernel.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
---
drivers/iio/industrialio-core.c | 35 +++++++++--------------------------
drivers/iio/industrialio-trigger.c | 6 +++---
include/linux/iio/iio.h | 31 +++++++++++++++++++++++++++++--
3 files changed, 41 insertions(+), 31 deletions(-)
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 17ec4cee51dc..7a5aa127c52e 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -1660,14 +1660,11 @@ static int iio_check_unique_scan_index(struct iio_dev *indio_dev)
static const struct iio_buffer_setup_ops noop_ring_setup_ops;
-/**
- * iio_device_register() - register a device with the IIO subsystem
- * @indio_dev: Device structure filled by the device driver
- **/
-int iio_device_register(struct iio_dev *indio_dev)
+int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod)
{
int ret;
+ indio_dev->driver_module = this_mod;
/* If the calling driver did not initialize of_node, do it here */
if (!indio_dev->dev.of_node && indio_dev->dev.parent)
indio_dev->dev.of_node = indio_dev->dev.parent->of_node;
@@ -1713,7 +1710,8 @@ int iio_device_register(struct iio_dev *indio_dev)
indio_dev->setup_ops = &noop_ring_setup_ops;
cdev_init(&indio_dev->chrdev, &iio_buffer_fileops);
- indio_dev->chrdev.owner = indio_dev->info->driver_module;
+
+ indio_dev->chrdev.owner = this_mod;
ret = cdev_device_add(&indio_dev->chrdev, &indio_dev->dev);
if (ret < 0)
@@ -1731,7 +1729,7 @@ int iio_device_register(struct iio_dev *indio_dev)
iio_device_unregister_debugfs(indio_dev);
return ret;
}
-EXPORT_SYMBOL(iio_device_register);
+EXPORT_SYMBOL(__iio_device_register);
/**
* iio_device_unregister() - unregister a device from the IIO subsystem
@@ -1763,23 +1761,8 @@ static void devm_iio_device_unreg(struct device *dev, void *res)
iio_device_unregister(*(struct iio_dev **)res);
}
-/**
- * devm_iio_device_register - Resource-managed iio_device_register()
- * @dev: Device to allocate iio_dev for
- * @indio_dev: Device structure filled by the device driver
- *
- * Managed iio_device_register. The IIO device registered with this
- * function is automatically unregistered on driver detach. This function
- * calls iio_device_register() internally. Refer to that function for more
- * information.
- *
- * If an iio_dev registered with this function needs to be unregistered
- * separately, devm_iio_device_unregister() must be used.
- *
- * RETURNS:
- * 0 on success, negative error number on failure.
- */
-int devm_iio_device_register(struct device *dev, struct iio_dev *indio_dev)
+int __devm_iio_device_register(struct device *dev, struct iio_dev *indio_dev,
+ struct module *this_mod)
{
struct iio_dev **ptr;
int ret;
@@ -1789,7 +1772,7 @@ int devm_iio_device_register(struct device *dev, struct iio_dev *indio_dev)
return -ENOMEM;
*ptr = indio_dev;
- ret = iio_device_register(indio_dev);
+ ret = __iio_device_register(indio_dev, this_mod);
if (!ret)
devres_add(dev, ptr);
else
@@ -1797,7 +1780,7 @@ int devm_iio_device_register(struct device *dev, struct iio_dev *indio_dev)
return ret;
}
-EXPORT_SYMBOL_GPL(devm_iio_device_register);
+EXPORT_SYMBOL_GPL(__devm_iio_device_register);
/**
* devm_iio_device_unregister - Resource-managed iio_device_unregister()
diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c
index 4061fed93f1f..9596fedacedb 100644
--- a/drivers/iio/industrialio-trigger.c
+++ b/drivers/iio/industrialio-trigger.c
@@ -250,7 +250,7 @@ static int iio_trigger_attach_poll_func(struct iio_trigger *trig,
= bitmap_empty(trig->pool, CONFIG_IIO_CONSUMERS_PER_TRIGGER);
/* Prevent the module from being removed whilst attached to a trigger */
- __module_get(pf->indio_dev->info->driver_module);
+ __module_get(pf->indio_dev->driver_module);
/* Get irq number */
pf->irq = iio_trigger_get_irq(trig);
@@ -286,7 +286,7 @@ static int iio_trigger_attach_poll_func(struct iio_trigger *trig,
out_put_irq:
iio_trigger_put_irq(trig, pf->irq);
out_put_module:
- module_put(pf->indio_dev->info->driver_module);
+ module_put(pf->indio_dev->driver_module);
return ret;
}
@@ -307,7 +307,7 @@ static int iio_trigger_detach_poll_func(struct iio_trigger *trig,
trig->attached_own_device = false;
iio_trigger_put_irq(trig, pf->irq);
free_irq(pf->irq, pf);
- module_put(pf->indio_dev->info->driver_module);
+ module_put(pf->indio_dev->driver_module);
return ret;
}
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index d68bec297a45..97a014300947 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -518,6 +518,7 @@ struct iio_buffer_setup_ops {
/**
* struct iio_dev - industrial I/O device
* @id: [INTERN] used to identify device internally
+ * @driver_module: [INTERN] used to make it harder to undercut users
* @modes: [DRIVER] operating modes supported by device
* @currentmode: [DRIVER] current operating mode
* @dev: [DRIVER] device structure, should be assigned a parent
@@ -558,6 +559,7 @@ struct iio_buffer_setup_ops {
*/
struct iio_dev {
int id;
+ struct module *driver_module;
int modes;
int currentmode;
@@ -604,9 +606,34 @@ struct iio_dev {
const struct iio_chan_spec
*iio_find_channel_from_si(struct iio_dev *indio_dev, int si);
-int iio_device_register(struct iio_dev *indio_dev);
+/**
+ * iio_device_register() - register a device with the IIO subsystem
+ * @indio_dev: Device structure filled by the device driver
+ **/
+#define iio_device_register(iio_dev) \
+ __iio_device_register((iio_dev), THIS_MODULE)
+int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod);
void iio_device_unregister(struct iio_dev *indio_dev);
-int devm_iio_device_register(struct device *dev, struct iio_dev *indio_dev);
+/**
+ * devm_iio_device_register - Resource-managed iio_device_register()
+ * @dev: Device to allocate iio_dev for
+ * @indio_dev: Device structure filled by the device driver
+ *
+ * Managed iio_device_register. The IIO device registered with this
+ * function is automatically unregistered on driver detach. This function
+ * calls iio_device_register() internally. Refer to that function for more
+ * information.
+ *
+ * If an iio_dev registered with this function needs to be unregistered
+ * separately, devm_iio_device_unregister() must be used.
+ *
+ * RETURNS:
+ * 0 on success, negative error number on failure.
+ */
+#define devm_iio_device_register(dev, indio_dev) \
+ __devm_iio_device_register((dev), (indio_dev), THIS_MODULE);
+int __devm_iio_device_register(struct device *dev, struct iio_dev *indio_dev,
+ struct module *this_mod);
void devm_iio_device_unregister(struct device *dev, struct iio_dev *indio_dev);
int iio_push_event(struct iio_dev *indio_dev, u64 ev_code, s64 timestamp);
int iio_device_claim_direct_mode(struct iio_dev *indio_dev);
--
2.13.3
--
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