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Commit fb71285f authored by Marek Szyprowski's avatar Marek Szyprowski
Browse files

ARM: DMA-Mapping: print warning when atomic coherent allocation fails 



Print a loud warning when system runs out of memory from atomic DMA
coherent pool to let users notice the potential problem.

Reported-by: default avatarAaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
parent 6e5267aa

arch/arm/mm/dma-mapping.c

+4 −0
Original line number Diff line number Diff line
@@ -461,6 +461,10 @@ static void *__alloc_from_pool(size_t size, struct page **ret_page) 
		bitmap_set(pool->bitmap, pageno, count);

		ptr = pool->vaddr + PAGE_SIZE * pageno;

		*ret_page = pool->page + pageno;

	} else {

		pr_err_once("ERROR: %u KiB atomic DMA coherent pool is too small!\n"

			    "Please increase it with coherent_pool= kernel parameter!\n",

			    (unsigned)pool->size / 1024);

	}

	spin_unlock_irqrestore(&pool->lock, flags);