From aed2c03c8d96ea471b86761129c213e05ab6fbef Mon Sep 17 00:00:00 2001 From: David Herrmann Date: Fri, 26 Jul 2013 12:09:32 +0200 Subject: drm/gem: fix mmap vma size calculations The VMA manager is page-size based so drm_vma_node_size() returns the size in pages. However, drm_gem_mmap_obj() requires the size in bytes. Apply PAGE_SHIFT so we no longer get EINVAL during mmaps due to too small buffers. This bug was introduced in commit: 0de23977cfeb5b357ec884ba15417ae118ff9e9b "drm/gem: convert to new unified vma manager" Fixes i915 gtt mmap failure reported by Sedat Dilek in: Re: linux-next: Tree for Jul 25 [ call-trace: drm | drm-intel related? ] Cc: Daniel Vetter Cc: Chris Wilson Signed-off-by: David Herrmann Reported-by: Sedat Dilek Tested-by: Sedat Dilek Signed-off-by: Dave Airlie --- drivers/gpu/drm/drm_gem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/gpu/drm/drm_gem.c') diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index 3613b50b5c2..1f7657286f0 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -666,7 +666,7 @@ int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) } obj = container_of(node, struct drm_gem_object, vma_node); - ret = drm_gem_mmap_obj(obj, drm_vma_node_size(node), vma); + ret = drm_gem_mmap_obj(obj, drm_vma_node_size(node) << PAGE_SHIFT, vma); mutex_unlock(&dev->struct_mutex); -- cgit v1.2.3-70-g09d2