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parisc: Fix sglist access in ccio-dma.c
commit d7da660cab
upstream.
This patch implements the same bug fix to ccio-dma.c as to sba_iommu.c.
It ensures that only the allocated entries of the sglist are accessed.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: stable@vger.kernel.org
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
f8f519d7df
commit
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1 changed files with 2 additions and 1 deletions
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@ -1003,7 +1003,7 @@ ccio_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents,
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ioc->usg_calls++;
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#endif
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while(sg_dma_len(sglist) && nents--) {
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while (nents && sg_dma_len(sglist)) {
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#ifdef CCIO_COLLECT_STATS
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ioc->usg_pages += sg_dma_len(sglist) >> PAGE_SHIFT;
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@ -1011,6 +1011,7 @@ ccio_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents,
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ccio_unmap_page(dev, sg_dma_address(sglist),
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sg_dma_len(sglist), direction, 0);
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++sglist;
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nents--;
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}
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DBG_RUN_SG("%s() DONE (nents %d)\n", __func__, nents);
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