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drm/gma500: Acquire reservation lock for GEM objects

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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@suse.de>
Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220308195222.13471-3-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
2022-03-08 20:52:12 +01:00
committed by Patrik Jakobsson
parent de2d1822f9
commit 16dad99de8
1 changed files with 12 additions and 0 deletions
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12
drivers/gpu/drm/gma500/gem.c
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@@ -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);