dma-contiguous: Retrun 'zero' pfn in case of error
When CMA allocator gets error return from the page
allocator framework, except for the -EBUSY case, it
will bail out. Caller depends on the 'pfn' for
confirming allocation successful or not. Return 0
for those error case.
CRs-Fixed: 647635
Change-Id: Ica4e04a9f9f18b1a29035ba2bae9deecfd68a5e8
Signed-off-by: Chintan Pandya <cpandya@codeaurora.org>
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index 6312bcd..2adcbbc 100644
--- a/drivers/base/dma-contiguous.c
+++ b/drivers/base/dma-contiguous.c
@@ -527,6 +527,7 @@
page = pfn_to_page(pfn);
break;
} else if (ret != -EBUSY) {
+ pfn = 0;
clear_cma_bitmap(cma, pfn, count);
break;
}