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[024/115] gpu: ion: Only map as much of the vma as the user requested

Message ID 1386973529-4884-25-git-send-email-john.stultz@linaro.org
State Accepted
Headers show

Commit Message

John Stultz Dec. 13, 2013, 10:23 p.m. UTC 
From: Rebecca Schultz Zavin <rebecca@android.com>

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>
---
 drivers/staging/android/ion/ion_system_heap.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c
index 3f607df..7397bc4 100644
--- a/drivers/staging/android/ion/ion_system_heap.c
+++ b/drivers/staging/android/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;
 }