net/mlx5: Keep autogroups list ordered

[cascardo/linux.git] / drivers / dma / dmaengine.c

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 8c9f45f..6b53526 100644 (file)
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -997,6 +997,13 @@ int dma_async_device_register(struct dma_device *device)
                }
                chan->client_count = 0;
        }
+
+       if (!chancnt) {
+               dev_err(device->dev, "%s: device has no channels!\n", __func__);
+               rc = -ENODEV;
+               goto err_out;
+       }
+
        device->chancnt = chancnt;
 
        mutex_lock(&dma_list_mutex);