Simpler and shorter code.
Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
---
drivers/dma/dmaengine.c | 20 +++++---------------
1 file changed, 5 insertions(+), 15 deletions(-)
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 08ba8473a284..1e9bdadfc312 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);
@@ -896,16 +894,10 @@ static bool device_has_all_tx_types(struct dma_device *device)
static int get_dma_id(struct dma_device *device)
{
- int rc;
-
- 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);
+ int rc = ida_alloc(&dma_ida, GFP_KERNEL);
+ if (rc >= 0)
+ device->dev_id = rc;
return rc;
}
@@ -1090,9 +1082,7 @@ 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;
}
--
2.17.1
--
To unsubscribe from this list: send the line "unsubscribe dmaengine" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
