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drm/vblank: Use spin_(un)lock_irq() in drm_crtc_vblank_reset()

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All of the drivers in the kernel tree only call this from one of the
following contexts:

* drm_crtc_funcs->reset
* During initial module load

Since both of these contexts are guaranteed to have interrupts enabled
beforehand, there's no need to use the irqsave/irqrestore variants of
spin_(un)lock(). So, fix this to make the irq context of this function
more obvious.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200720190736.180297-2-lyude@redhat.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Lyude Paul 2020-07-20 15:07:32 -04:00
parent 5767603c26
commit fbc678e836
1 changed files with 2 additions and 3 deletions
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5
drivers/gpu/drm/drm_vblank.c
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@ -1363,11 +1363,10 @@ EXPORT_SYMBOL(drm_crtc_vblank_off);
void drm_crtc_vblank_reset(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
unsigned long irqflags;
unsigned int pipe = drm_crtc_index(crtc);
struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
spin_lock_irqsave(&dev->vbl_lock, irqflags);
spin_lock_irq(&dev->vbl_lock);
/*
* Prevent subsequent drm_vblank_get() from enabling the vblank
* interrupt by bumping the refcount.
@ -1376,7 +1375,7 @@ void drm_crtc_vblank_reset(struct drm_crtc *crtc)
atomic_inc(&vblank->refcount);
vblank->inmodeset = 1;
}
spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
spin_unlock_irq(&dev->vbl_lock);
drm_WARN_ON(dev, !list_empty(&dev->vblank_event_list));
drm_WARN_ON(dev, !list_empty(&vblank->pending_work));