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driver-core: document ERR_PTR() return values

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A number of functions in the driver core return ERR_PTR() values on
error. Document this in the kernel-doc of the functions.

Signed-off-by: Jani Nikula <ext-jani.1.nikula@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jani Nikula
2010-03-11 18:11:45 +02:00
committed by Greg Kroah-Hartman
parent 178a5b35b2
commit f0eae0ed3b
3 changed files with 14 additions and 0 deletions
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6
drivers/base/platform.c
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@@ -362,6 +362,8 @@ EXPORT_SYMBOL_GPL(platform_device_unregister);
* enumeration tasks, they don't fully conform to the Linux driver model.
* In particular, when such drivers are built as modules, they can't be
* "hotplugged".
*
* Returns &struct platform_device pointer on success, or ERR_PTR() on error.
*/
struct platform_device *platform_device_register_simple(const char *name,
int id,
@@ -408,6 +410,8 @@ EXPORT_SYMBOL_GPL(platform_device_register_simple);
* allocated for the device allows drivers using such devices to be
* unloaded without waiting for the last reference to the device to be
* dropped.
*
* Returns &struct platform_device pointer on success, or ERR_PTR() on error.
*/
struct platform_device *platform_device_register_data(
struct device *parent,
@@ -559,6 +563,8 @@ EXPORT_SYMBOL_GPL(platform_driver_probe);
*
* Use this in legacy-style modules that probe hardware directly and
* register a single platform device and corresponding platform driver.
*
* Returns &struct platform_device pointer on success, or ERR_PTR() on error.
*/
struct platform_device * __init_or_module platform_create_bundle(
struct platform_driver *driver,