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-rw-r--r--lib/dma-debug.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index d9b08e0f7f5..cf906201aec 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -670,12 +670,13 @@ static int device_dma_allocations(struct device *dev)
return count;
}
-static int dma_debug_device_change(struct notifier_block *nb,
- unsigned long action, void *data)
+static int dma_debug_device_change(struct notifier_block *nb, unsigned long action, void *data)
{
struct device *dev = data;
int count;
+ if (global_disable)
+ return 0;
switch (action) {
case BUS_NOTIFY_UNBOUND_DRIVER:
@@ -697,6 +698,9 @@ void dma_debug_add_bus(struct bus_type *bus)
{
struct notifier_block *nb;
+ if (global_disable)
+ return;
+
nb = kzalloc(sizeof(struct notifier_block), GFP_KERNEL);
if (nb == NULL) {
pr_err("dma_debug_add_bus: out of memory\n");