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gpu: ion: Only map as much of the vma as the user requested

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Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
[jstultz: modified patch to apply to staging directory]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rebecca Schultz Zavin 2013-12-13 14:23:58 -08:00 • committed by Greg Kroah-Hartman
commit b82302438b
1 changed files with 2 additions and 0 deletions
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drivers/staging/android/ion/ion_system_heap.c
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@ -192,6 +192,8 @@ int ion_system_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
remap_pfn_range(vma, addr, page_to_pfn(sg_page(sg)),
sg_dma_len(sg), vma->vm_page_prot);
addr += sg_dma_len(sg);
if (addr >= vma->vm_end)
return 0;
}
return 0;
}