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driver core: warn that platform_driver_probe can not use deferred probing 

Add documentation that platform_driver_probe() is incompatible with
deferred probing.

Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Fabio Porcedda 2013-03-26 10:35:15 +01:00 committed by Greg Kroah-Hartman
parent 3db3c62584
commit 647c86d0a2
1 changed files with 5 additions and 1 deletions
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6
drivers/base/platform.c
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@ -555,7 +555,8 @@ EXPORT_SYMBOL_GPL(platform_driver_unregister);
/**
* platform_driver_probe - register driver for non-hotpluggable device
* @drv: platform driver structure
* @probe: the driver probe routine, probably from an __init section
* @probe: the driver probe routine, probably from an __init section,
* must not return -EPROBE_DEFER.
*
* Use this instead of platform_driver_register() when you know the device
* is not hotpluggable and has already been registered, and you want to
@ -566,6 +567,9 @@ EXPORT_SYMBOL_GPL(platform_driver_unregister);
* into system-on-chip processors, where the controller devices have been
* configured as part of board setup.
*
* This is incompatible with deferred probing so probe() must not
* return -EPROBE_DEFER.
*
* Returns zero if the driver registered and bound to a device, else returns
* a negative error code and with the driver not registered.
*/