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dma-debug: report -EEXIST errors in add_dma_entry

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Since, overlapping mappings are not supported by the DMA API we should
report an error if active_cacheline_insert returns -EEXIST.

Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Hamza Mahfooz <someguy@effective-light.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Hamza Mahfooz
2021-05-18 08:54:43 -04:00
committed by Christoph Hellwig
parent bab1622350
commit 2b4bbc6231
1 changed files with 2 additions and 4 deletions
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kernel/dma/debug.c
+2 -4
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@@ -566,11 +566,9 @@ static void add_dma_entry(struct dma_debug_entry *entry)
if (rc == -ENOMEM) {
pr_err("cacheline tracking ENOMEM, dma-debug disabled\n");
global_disable = true;
} else if (rc == -EEXIST) {
pr_err("cacheline tracking EEXIST, overlapping mappings aren't supported\n");
}
/* TODO: report -EEXIST errors here as overlapping mappings are
* not supported by the DMA API
*/
}
static int dma_debug_create_entries(gfp_t gfp)