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core: platform: let platform_driver_probe initialize module owner 

Since commit 9447057eaf ("platform_device: use a macro instead of
platform_driver_register"), platform_driver_register() always overwrites
the .owner field of a platform_driver with THIS_MODULE. This breaks
platform_driver_probe() which uses it from within the platform core
instead of the module init. Fix it by using a similar #define construct
to obtain THIS_MODULE and pass it on later.

Reported-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wolfram Sang 2014-10-28 17:40:41 +01:00 committed by Greg Kroah-Hartman
parent 161d698109
commit c3b50dc219
2 changed files with 10 additions and 7 deletions
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11
drivers/base/platform.c
View File

@ -580,9 +580,10 @@ void platform_driver_unregister(struct platform_driver *drv)
EXPORT_SYMBOL_GPL(platform_driver_unregister);
/**
* platform_driver_probe - register driver for non-hotpluggable device
* __platform_driver_probe - register driver for non-hotpluggable device
* @drv: platform driver structure
* @probe: the driver probe routine, probably from an __init section
* @module: module which will be the owner of the driver
*
* Use this instead of platform_driver_register() when you know the device
* is not hotpluggable and has already been registered, and you want to
@ -598,8 +599,8 @@ EXPORT_SYMBOL_GPL(platform_driver_unregister);
* Returns zero if the driver registered and bound to a device, else returns
* a negative error code and with the driver not registered.
*/
int __init_or_module platform_driver_probe(struct platform_driver *drv,
int (*probe)(struct platform_device *))
int __init_or_module __platform_driver_probe(struct platform_driver *drv,
int (*probe)(struct platform_device *), struct module *module)
{
int retval, code;
@ -614,7 +615,7 @@ int __init_or_module platform_driver_probe(struct platform_driver *drv,
/* temporary section violation during probe() */
drv->probe = probe;
retval = code = platform_driver_register(drv);
retval = code = __platform_driver_register(drv, module);
/*
* Fixup that section violation, being paranoid about code scanning
@ -633,7 +634,7 @@ int __init_or_module platform_driver_probe(struct platform_driver *drv,
platform_driver_unregister(drv);
return retval;
}
EXPORT_SYMBOL_GPL(platform_driver_probe);
EXPORT_SYMBOL_GPL(__platform_driver_probe);
/**
* platform_create_bundle - register driver and create corresponding device

6
include/linux/platform_device.h
View File

@ -197,8 +197,10 @@ extern void platform_driver_unregister(struct platform_driver *);
/* non-hotpluggable platform devices may use this so that probe() and
* its support may live in __init sections, conserving runtime memory.
*/
extern int platform_driver_probe(struct platform_driver *driver,
int (*probe)(struct platform_device *));
#define platform_driver_probe(drv, probe) \
__platform_driver_probe(drv, probe, THIS_MODULE)
extern int __platform_driver_probe(struct platform_driver *driver,
int (*probe)(struct platform_device *), struct module *module);
static inline void *platform_get_drvdata(const struct platform_device *pdev)
{