d72498ca2c
The proper fix would have been to select LEDS_CLASS but this can lead
to a circular dependency, as found out by Arnd.
This patch implements Arnd's suggestion instead, at the cost of some
auto-magic for a fringe feature.
Reported-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: Intel's 0-DAY
Fixes: 8d021d71b3 ("drm/nouveau/drm/nouveau: add a LED driver for the NVIDIA logo")
Signed-off-by: Martin Peres <martin.peres@free.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
58 lines
2 KiB
C
58 lines
2 KiB
C
/*
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* Copyright 2015 Martin Peres
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Martin Peres <martin.peres@free.fr>
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*/
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#ifndef __NOUVEAU_LED_H__
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#define __NOUVEAU_LED_H__
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#include "nouveau_drv.h"
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struct led_classdev;
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struct nouveau_led {
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struct drm_device *dev;
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struct led_classdev led;
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};
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static inline struct nouveau_led *
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nouveau_led(struct drm_device *dev)
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{
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return nouveau_drm(dev)->led;
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}
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/* nouveau_led.c */
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#if IS_REACHABLE(CONFIG_LEDS_CLASS)
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int nouveau_led_init(struct drm_device *dev);
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void nouveau_led_suspend(struct drm_device *dev);
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void nouveau_led_resume(struct drm_device *dev);
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void nouveau_led_fini(struct drm_device *dev);
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#else
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static inline int nouveau_led_init(struct drm_device *dev) { return 0; };
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static inline void nouveau_led_suspend(struct drm_device *dev) { };
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static inline void nouveau_led_resume(struct drm_device *dev) { };
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static inline void nouveau_led_fini(struct drm_device *dev) { };
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#endif
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#endif
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