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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>
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1 changed files with 5 additions and 1 deletions
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@ -555,7 +555,8 @@ EXPORT_SYMBOL_GPL(platform_driver_unregister);
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/**
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* platform_driver_probe - register driver for non-hotpluggable device
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* @drv: platform driver structure
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* @probe: the driver probe routine, probably from an __init section
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* @probe: the driver probe routine, probably from an __init section,
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* must not return -EPROBE_DEFER.
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*
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* Use this instead of platform_driver_register() when you know the device
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* is not hotpluggable and has already been registered, and you want to
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@ -566,6 +567,9 @@ EXPORT_SYMBOL_GPL(platform_driver_unregister);
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* into system-on-chip processors, where the controller devices have been
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* configured as part of board setup.
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*
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* This is incompatible with deferred probing so probe() must not
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* return -EPROBE_DEFER.
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*
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* Returns zero if the driver registered and bound to a device, else returns
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* a negative error code and with the driver not registered.
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*/
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