From 2b4bbc6231d789f58676d2ccc42177df163e1c4a Mon Sep 17 00:00:00 2001 From: Hamza Mahfooz Date: Tue, 18 May 2021 08:54:43 -0400 Subject: 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 Signed-off-by: Hamza Mahfooz Signed-off-by: Christoph Hellwig --- kernel/dma/debug.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'kernel/dma') 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) -- cgit v1.2.3