On 5/11/2022 10:18 PM, Miaoqian Lin wrote:
1. of_find_device_by_node() takes reference, we should use put_device()
to release it when not need anymore.
2. of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not needed anymore.
Add put_device() and of_node_put() in some error paths to fix.
Sounds like you need 2 patches for this? One just for the put_device()
and the other for the of_node_put()?
Fixes: ec9bfa1e1a79 ("dmaengine: ti-dma-crossbar: dra7: Use bitops instead of idr")
Fixes: a074ae38f859 ("dmaengine: Add driver for TI DMA crossbar on DRA7x")
Signed-off-by: Miaoqian Lin <linmq006@xxxxxxxxx>
---
drivers/dma/ti/dma-crossbar.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/dma/ti/dma-crossbar.c b/drivers/dma/ti/dma-crossbar.c
index 71d24fc07c00..f744ddbbbad7 100644
--- a/drivers/dma/ti/dma-crossbar.c
+++ b/drivers/dma/ti/dma-crossbar.c
@@ -245,6 +245,7 @@ static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec,
if (dma_spec->args[0] >= xbar->xbar_requests) {
dev_err(&pdev->dev, "Invalid XBAR request number: %d\n",
dma_spec->args[0]);
+ put_device(&pdev->dev);
return ERR_PTR(-EINVAL);
}
@@ -252,12 +253,14 @@ static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec,
dma_spec->np = of_parse_phandle(ofdma->of_node, "dma-masters", 0);
if (!dma_spec->np) {
dev_err(&pdev->dev, "Can't get DMA master\n");
+ put_device(&pdev->dev);
return ERR_PTR(-EINVAL);
}
map = kzalloc(sizeof(*map), GFP_KERNEL);
if (!map) {
of_node_put(dma_spec->np);
+ put_device(&pdev->dev);
return ERR_PTR(-ENOMEM);
}
@@ -268,6 +271,8 @@ static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec,
mutex_unlock(&xbar->mutex);
dev_err(&pdev->dev, "Run out of free DMA requests\n");
kfree(map);
+ of_node_put(dma_spec->np);
+ put_device(&pdev->dev);
return ERR_PTR(-ENOMEM);
}
set_bit(map->xbar_out, xbar->dma_inuse);
