Protect concurrent access to struct psb_gem_object by acquiring the GEM object's reservation lock; as it's supposed to be. The use of the GTT mutex can now be moved into GTT code. Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> Acked-by: Patrik Jakobsson <patrik.r.jakobsson@xxxxxxxxx> --- drivers/gpu/drm/gma500/gem.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/gpu/drm/gma500/gem.c b/drivers/gpu/drm/gma500/gem.c index fe7d242567c0..026ce11f7460 100644 --- a/drivers/gpu/drm/gma500/gem.c +++ b/drivers/gpu/drm/gma500/gem.c @@ -31,6 +31,10 @@ int psb_gem_pin(struct psb_gem_object *pobj) unsigned int npages; int ret; + ret = dma_resv_lock(obj->resv, NULL); + if (drm_WARN_ONCE(dev, ret, "dma_resv_lock() failed, ret=%d\n", ret)) + return ret; + mutex_lock(&dev_priv->gtt_mutex); if (pobj->in_gart || pobj->stolen) @@ -56,11 +60,13 @@ int psb_gem_pin(struct psb_gem_object *pobj) out: ++pobj->in_gart; mutex_unlock(&dev_priv->gtt_mutex); + dma_resv_unlock(obj->resv); return 0; err_mutex_unlock: mutex_unlock(&dev_priv->gtt_mutex); + dma_resv_unlock(obj->resv); return ret; } @@ -71,6 +77,11 @@ void psb_gem_unpin(struct psb_gem_object *pobj) struct drm_psb_private *dev_priv = to_drm_psb_private(dev); u32 gpu_base = dev_priv->gtt.gatt_start; unsigned long npages; + int ret; + + ret = dma_resv_lock(obj->resv, NULL); + if (drm_WARN_ONCE(dev, ret, "dma_resv_lock() failed, ret=%d\n", ret)) + return; mutex_lock(&dev_priv->gtt_mutex); @@ -95,6 +106,7 @@ void psb_gem_unpin(struct psb_gem_object *pobj) out: mutex_unlock(&dev_priv->gtt_mutex); + dma_resv_unlock(obj->resv); } static vm_fault_t psb_gem_fault(struct vm_fault *vmf); -- 2.35.1
