From: Rebecca Schultz Zavin <rebecca@android.com>
Date: Fri, 10 Aug 2012 04:29:52 +0000 (-0700)
Subject: gpu: ion: Only map as much of the vma as the user requested
X-Git-Tag: firefly_0821_release~4090^2~691
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=acc6b1e7ebc6b98d197204200c049f3394c88ae1;p=firefly-linux-kernel-4.4.55.git

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

Change-Id: If0e368e192941c118683ab74aed48e4e0cb5731d
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
---

diff --git a/drivers/gpu/ion/ion_system_heap.c b/drivers/gpu/ion/ion_system_heap.c
index 726448d43fc1..e7fb07d45a2a 100644
--- a/drivers/gpu/ion/ion_system_heap.c
+++ b/drivers/gpu/ion/ion_system_heap.c
@@ -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;
 }