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Diffstat (limited to 'drivers/base/dma-contiguous.c')
-rw-r--r--drivers/base/dma-contiguous.c18
1 files changed, 7 insertions, 11 deletions
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index 34d94c762a1e..9a1469474f55 100644
--- a/drivers/base/dma-contiguous.c
+++ b/drivers/base/dma-contiguous.c
@@ -315,6 +315,7 @@ struct page *dma_alloc_from_contiguous(struct device *dev, int count,
{
unsigned long mask, pfn, pageno, start = 0;
struct cma *cma = dev_get_cma_area(dev);
+ struct page *page = NULL;
int ret;
if (!cma || !cma->count)
@@ -336,18 +337,17 @@ struct page *dma_alloc_from_contiguous(struct device *dev, int count,
for (;;) {
pageno = bitmap_find_next_zero_area(cma->bitmap, cma->count,
start, count, mask);
- if (pageno >= cma->count) {
- ret = -ENOMEM;
- goto error;
- }
+ if (pageno >= cma->count)
+ break;
pfn = cma->base_pfn + pageno;
ret = alloc_contig_range(pfn, pfn + count, MIGRATE_CMA);
if (ret == 0) {
bitmap_set(cma->bitmap, pageno, count);
+ page = pfn_to_page(pfn);
break;
} else if (ret != -EBUSY) {
- goto error;
+ break;
}
pr_debug("%s(): memory range at %p is busy, retrying\n",
__func__, pfn_to_page(pfn));
@@ -356,12 +356,8 @@ struct page *dma_alloc_from_contiguous(struct device *dev, int count,
}
mutex_unlock(&cma_mutex);
-
- pr_debug("%s(): returned %p\n", __func__, pfn_to_page(pfn));
- return pfn_to_page(pfn);
-error:
- mutex_unlock(&cma_mutex);
- return NULL;
+ pr_debug("%s(): returned %p\n", __func__, page);
+ return page;
}
/**