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drm/prime: Fix drm_gem_prime_mmap() stack use 

drivers/gpu/drm/drm_prime.c: In function 'drm_gem_prime_mmap':
>> drivers/gpu/drm/drm_prime.c:688:1: warning: the frame size of 1592 bytes is larger than 1024 bytes [-Wframe-larger-than=]

Fix by allocating on the heap.

Fixes: 7698799f95 ("drm/prime: Add drm_gem_prime_mmap()")
Reported-by: kbuild test robot <lkp@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Christian König <christian.koenig@amd.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20181121180215.13881-1-noralf@tronnes.org
hifive-unleashed-5.1
Noralf Trønnes 2018-11-21 19:02:15 +01:00
parent 7b24eec754
commit 10fdb7d2ad
1 changed files with 20 additions and 11 deletions
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31
drivers/gpu/drm/drm_prime.c
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@ -663,24 +663,33 @@ EXPORT_SYMBOL(drm_gem_prime_handle_to_fd);
*/
int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
{
/* Used by drm_gem_mmap() to lookup the GEM object */
struct drm_file priv = {
.minor = obj->dev->primary,
};
struct file fil = {
.private_data = &priv,
};
struct drm_file *priv;
struct file *fil;
int ret;
ret = drm_vma_node_allow(&obj->vma_node, &priv);
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
fil = kzalloc(sizeof(*fil), GFP_KERNEL);
if (!priv || !fil) {
ret = -ENOMEM;
goto out;
}
/* Used by drm_gem_mmap() to lookup the GEM object */
priv->minor = obj->dev->primary;
fil->private_data = priv;
ret = drm_vma_node_allow(&obj->vma_node, priv);
if (ret)
return ret;
goto out;
vma->vm_pgoff += drm_vma_node_start(&obj->vma_node);
ret = obj->dev->driver->fops->mmap(&fil, vma);
ret = obj->dev->driver->fops->mmap(fil, vma);
drm_vma_node_revoke(&obj->vma_node, &priv);
drm_vma_node_revoke(&obj->vma_node, priv);
out:
kfree(priv);
kfree(fil);
return ret;
}