diff options
| -rw-r--r-- | lib/dma-debug.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/lib/dma-debug.c b/lib/dma-debug.c index 1ac35dbaf8e0..9722bd2dbc9b 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c @@ -102,9 +102,12 @@ static DEFINE_SPINLOCK(free_entries_lock); /* Global disable flag - will be set in case of an error */ static u32 global_disable __read_mostly; +/* Early initialization disable flag, set at the end of dma_debug_init */ +static bool dma_debug_initialized __read_mostly; + static inline bool dma_debug_disabled(void) { - return global_disable; + return global_disable || !dma_debug_initialized; } /* Global error count */ @@ -999,7 +1002,10 @@ void dma_debug_init(u32 num_entries) { int i; - if (dma_debug_disabled()) + /* Do not use dma_debug_initialized here, since we really want to be + * called to set dma_debug_initialized + */ + if (global_disable) return; for (i = 0; i < HASH_SIZE; ++i) { @@ -1026,6 +1032,8 @@ void dma_debug_init(u32 num_entries) nr_total_entries = num_free_entries; + dma_debug_initialized = true; + pr_info("DMA-API: debugging enabled by kernel config\n"); } |