Messages in this thread Patch in this message | | | Date | Thu, 19 Mar 2009 10:39:31 +0900 | Subject | [PATCH -tip] dma-debug: warn of unmapping an invalid dma address | From | FUJITA Tomonori <> |
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Calling dma_unmap families against an invalid dma address should be a bug.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> --- lib/dma-debug.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/lib/dma-debug.c b/lib/dma-debug.c index 9a350b4..f9e6d38 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c @@ -531,8 +531,11 @@ static void check_unmap(struct dma_debug_entry *ref) struct hash_bucket *bucket; unsigned long flags; - if (dma_mapping_error(ref->dev, ref->dev_addr)) + if (dma_mapping_error(ref->dev, ref->dev_addr)) { + err_printk(ref->dev, NULL, "DMA-API: device driver tries " + "to free an invalid DMA memory address\n"); return; + } bucket = get_hash_bucket(ref, &flags); entry = hash_bucket_find(bucket, ref); -- 1.6.0.6
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