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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-11-23 10:32:53 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-12-01 10:05:11 +0100 |
| commit | 737292a3c0f251a93dcce4bedf7e4accb35335bc (patch) | |
| tree | 6849b21eb6b3ac4601174a91763c41dc5b6db95e /drivers/gpu/drm/gma500/gtt.c | |
| parent | 0e3089fa50df00b963067aa5a34d5fc01d93802a (diff) | |
| download | op-kernel-dev-737292a3c0f251a93dcce4bedf7e4accb35335bc.zip op-kernel-dev-737292a3c0f251a93dcce4bedf7e4accb35335bc.tar.gz | |
drm/gma500: Add driver private mutex for the fault handler
There's currently two places where the gma500 fault handler relies
upon dev->struct_mutex:
- To protect r->mappping
- To make sure vm_insert_pfn isn't called concurrently (in which case
the 2nd thread would get an error code).
Everything else (specifically psb_gtt_pin) is already protected by
some other locks. Hence just create a new driver-private mmap_mutex
just for this function.
With this gma500 is complete dev->struct_mutex free!
Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1448271183-20523-21-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'drivers/gpu/drm/gma500/gtt.c')
| -rw-r--r-- | drivers/gpu/drm/gma500/gtt.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/gtt.c b/drivers/gpu/drm/gma500/gtt.c index ce015db..8f69225 100644 --- a/drivers/gpu/drm/gma500/gtt.c +++ b/drivers/gpu/drm/gma500/gtt.c @@ -425,6 +425,7 @@ int psb_gtt_init(struct drm_device *dev, int resume) if (!resume) { mutex_init(&dev_priv->gtt_mutex); + mutex_init(&dev_priv->mmap_mutex); psb_gtt_alloc(dev); } |
