[PATCH 103/115] ion: check return value from remap_pfn_range

John Stultz
2013-12-14T03:27:47Z

From: Colin Cross <ccross@android.com>

Check the return value of remap_pfn_range and return an error if
it fails.

Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
drivers/staging/android/ion/ion_heap.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/android/ion/ion_heap.c b/drivers/staging/android/ion/ion_heap.c
index ce31561..ecc14fd 100644
--- a/drivers/staging/android/ion/ion_heap.c
+++ b/drivers/staging/android/ion/ion_heap.c
@@ -76,6 +76,7 @@ int ion_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
unsigned long offset = vma->vm_pgoff * PAGE_SIZE;
struct scatterlist *sg;
int i;
+ int ret;

for_each_sg(table->sgl, sg, table->nents, i) {
struct page *page = sg_page(sg);
@@ -91,8 +92,10 @@ int ion_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
offset = 0;
}
len = min(len, remainder);
- remap_pfn_range(vma, addr, page_to_pfn(page), len,
+ ret = remap_pfn_range(vma, addr, page_to_pfn(page), len,
vma->vm_page_prot);
+ if (ret)
+ return ret;
addr += len;
if (addr >= vma->vm_end)
return 0;
--
1.8.3.2