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| author |   Christoph Hellwig <hch@lst.de> | 2019-01-04 17:17:53 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-02-01 09:56:38 +0100 |
| commit | 645386dfe6307dbb28f10a4513792a59beda0efa (patch) | |
| tree | 32166531d281cf857a6bb73a22b0cb4c0e0c12d1 /include/linux/dma-mapping.h | |
| parent | dma-mapping: remove the default map_resource implementation (diff) | |
| download | linux-dev-645386dfe6307dbb28f10a4513792a59beda0efa.tar.xz linux-dev-645386dfe6307dbb28f10a4513792a59beda0efa.zip | |
dma-mapping: don't BUG when calling dma_map_resource on RAM
Use WARN_ON_ONCE to print a stack trace and return a proper error
code instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/dma-mapping.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 9842085e6774..b904d55247ab 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -353,7 +353,8 @@ static inline dma_addr_t dma_map_resource(struct device *dev, BUG_ON(!valid_dma_direction(dir)); /* Don't allow RAM to be mapped */ - BUG_ON(pfn_valid(PHYS_PFN(phys_addr))); + if (WARN_ON_ONCE(pfn_valid(PHYS_PFN(phys_addr)))) + return DMA_MAPPING_ERROR; if (dma_is_direct(ops)) addr = dma_direct_map_resource(dev, phys_addr, size, dir, attrs); |