dmaengine: Convert to new IDA API
Simpler and shorter code.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Acked-by: Vinod Koul <vkoul@kernel.org>
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 08ba847..83e8c5c 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -161,9 +161,7 @@ static void chan_dev_release(struct device *dev)
chan_dev = container_of(dev, typeof(*chan_dev), device);
if (atomic_dec_and_test(chan_dev->idr_ref)) {
- mutex_lock(&dma_list_mutex);
- ida_remove(&dma_ida, chan_dev->dev_id);
- mutex_unlock(&dma_list_mutex);
+ ida_free(&dma_ida, chan_dev->dev_id);
kfree(chan_dev->idr_ref);
}
kfree(chan_dev);
@@ -896,17 +894,12 @@ static bool device_has_all_tx_types(struct dma_device *device)
static int get_dma_id(struct dma_device *device)
{
- int rc;
+ int rc = ida_alloc(&dma_ida, GFP_KERNEL);
- do {
- if (!ida_pre_get(&dma_ida, GFP_KERNEL))
- return -ENOMEM;
- mutex_lock(&dma_list_mutex);
- rc = ida_get_new(&dma_ida, &device->dev_id);
- mutex_unlock(&dma_list_mutex);
- } while (rc == -EAGAIN);
-
- return rc;
+ if (rc < 0)
+ return rc;
+ device->dev_id = rc;
+ return 0;
}
/**
@@ -1090,9 +1083,7 @@ int dma_async_device_register(struct dma_device *device)
err_out:
/* if we never registered a channel just release the idr */
if (atomic_read(idr_ref) == 0) {
- mutex_lock(&dma_list_mutex);
- ida_remove(&dma_ida, device->dev_id);
- mutex_unlock(&dma_list_mutex);
+ ida_free(&dma_ida, device->dev_id);
kfree(idr_ref);
return rc;
}