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ion: check return value from remap_pfn_range

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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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Colin Cross 2013-12-13 19:26:23 -08:00 • committed by Greg Kroah-Hartman
parent ce3d10933a
commit e460bc5e43
1 changed files with 4 additions and 1 deletions
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5
drivers/staging/android/ion/ion_heap.c
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@ -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; unsigned long offset = vma->vm_pgoff * PAGE_SIZE;
struct scatterlist *sg; struct scatterlist *sg;
int i; int i;
int ret;
for_each_sg(table->sgl, sg, table->nents, i) { for_each_sg(table->sgl, sg, table->nents, i) {
struct page *page = sg_page(sg); 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; offset = 0;
} }
len = min(len, remainder); 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); vma->vm_page_prot);
if (ret)
return ret;
addr += len; addr += len;
if (addr >= vma->vm_end) if (addr >= vma->vm_end)
return 0; return 0;