diff options
Diffstat (limited to 'lib/swiotlb.c')
| -rw-r--r-- | lib/swiotlb.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/lib/swiotlb.c b/lib/swiotlb.c index 3c365ab6c..76f29ecba 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -29,10 +29,10 @@ #include <linux/ctype.h> #include <linux/highmem.h> #include <linux/gfp.h> +#include <linux/scatterlist.h> #include <asm/io.h> #include <asm/dma.h> -#include <asm/scatterlist.h> #include <linux/init.h> #include <linux/bootmem.h> @@ -656,7 +656,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size, */ phys_addr_t paddr = map_single(hwdev, 0, size, DMA_FROM_DEVICE); if (paddr == SWIOTLB_MAP_ERROR) - return NULL; + goto err_warn; ret = phys_to_virt(paddr); dev_addr = phys_to_dma(hwdev, paddr); @@ -670,7 +670,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size, /* DMA_TO_DEVICE to avoid memcpy in unmap_single */ swiotlb_tbl_unmap_single(hwdev, paddr, size, DMA_TO_DEVICE); - return NULL; + goto err_warn; } } @@ -678,6 +678,13 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size, memset(ret, 0, size); return ret; + +err_warn: + pr_warn("swiotlb: coherent allocation failed for device %s size=%zu\n", + dev_name(hwdev), size); + dump_stack(); + + return NULL; } EXPORT_SYMBOL(swiotlb_alloc_coherent); |