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| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2012-08-22 14:50:42 +0200 |
|---|---|---|
| committer | Marek Szyprowski <m.szyprowski@samsung.com> | 2012-08-28 21:01:03 +0200 |
| commit | fb71285f0c1633a85544784aae7577502274b77a (patch) | |
| tree | feac1389aef43f8cd58606fd9c546cbe38443406 /arch | |
| parent | 6e5267aa543817015edb4a65c66e15f9809f92bd (diff) | |
| download | linux-fb71285f0c1633a85544784aae7577502274b77a.tar.gz linux-fb71285f0c1633a85544784aae7577502274b77a.tar.bz2 linux-fb71285f0c1633a85544784aae7577502274b77a.zip | |
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: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index d1cc9c1d3566..acced9332109 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -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); |