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authorHamza Mahfooz <someguy@effective-light.com>2021-05-18 15:54:43 +0300
committerChristoph Hellwig <hch@lst.de>2021-06-22 09:15:47 +0300
commit2b4bbc6231d789f58676d2ccc42177df163e1c4a (patch)
treec7ec7d228c7fcd3b551f527de9c70f0ea07730a5 /kernel/dma
parentbab1622350699dc209db4f50d9ab99e6f6465334 (diff)
downloadlinux-2b4bbc6231d789f58676d2ccc42177df163e1c4a.tar.xz
dma-debug: report -EEXIST errors in add_dma_entry
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>
Diffstat (limited to 'kernel/dma')
-rw-r--r--kernel/dma/debug.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c
index 14de1271463f..dadae6255d05 100644
--- a/kernel/dma/debug.c
+++ b/kernel/dma/debug.c
@@ -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)