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Commit 2550bbfd authored by Christoph Hellwig's avatar Christoph Hellwig
Browse files

dma-direct: don't crash on device without dma_mask 



Print a useful warning instead.

Reported-by: default avatarFinn Thain <fthain@telegraphics.com.au>
Tested-by: default avatarFinn Thain <fthain@telegraphics.com.au>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 267d2e18

lib/dma-direct.c

+7 −0
Original line number Diff line number Diff line
@@ -34,6 +34,13 @@ check_addr(struct device *dev, dma_addr_t dma_addr, size_t size, 
		const char *caller)

{

	if (unlikely(dev && !dma_capable(dev, dma_addr, size))) {

		if (!dev->dma_mask) {

			dev_err(dev,

				"%s: call on device without dma_mask\n",

				caller);

			return false;

		}



		if (*dev->dma_mask >= DMA_BIT_MASK(32)) {

			dev_err(dev,

				"%s: overflow %pad+%zu of device mask %llx\n",