1 files changed, 4 insertions, 0 deletions

diff --git a/crypto/async_tx/async_tx.c b/crypto/async_tx/async_tx.c
index 60615fedcf5e..f9cdf04fe7c0 100644
--- a/crypto/async_tx/async_tx.c
+++ b/crypto/async_tx/async_tx.c
@@ -81,6 +81,10 @@ async_tx_channel_switch(struct dma_async_tx_descriptor *depend_tx,
         struct dma_device *device = chan->device;
         struct dma_async_tx_descriptor *intr_tx = (void *) ~0;
 
+        #ifdef CONFIG_ASYNC_TX_DISABLE_CHANNEL_SWITCH
+        BUG();
+        #endif
+
         /* first check to see if we can still append to depend_tx */
         spin_lock_bh(&depend_tx->lock);
         if (depend_tx->parent && depend_tx->chan == tx->chan) {